### **ITEM P‑403 PLANT MIX BITUMINOUS PAVEMENTS (Base, Leveling or Surface Course)**

DESCRIPTION

**403‑1.1** This item shall consist of a **\[ \]** course composed of
mineral aggregate and bituminous material mixed in a central mixing
plant and placed on a prepared course in accordance with these
specifications and shall conform to the lines, grades, thicknesses, and
typical cross sections shown on the plans. Each course shall be
constructed to the depth, typical section, and elevation required by the
plans and shall be rolled, finished, and approved before the placement
of the next course.

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> **Specify base and/or leveling course(s). Surface course may also be
> specified but only for those pavements designed to accommodate
> aircraft of gross weights less than or equal to 12,500 pounds (5,670
> kg) or for surface course of shoulders, blast pads, service roads,
> etc. Item P-401 is to be specified for surface courses for pavements
> designed to accommodate aircraft gross weights greater than 12,500
> pounds (5,670 kg).**
>
> **This specification is to be used as a base or leveling course for
> pavements designed to accommodate aircraft of gross weights greater
> than 12,500 pounds (5,670 kg). State highway department specifications
> may be used in lieu of this specification for access roads, perimeter
> roads, stabilized base courses under Item P-501, and other pavements
> not subject to aircraft loading, or for pavements designed for
> aircraft gross weights of 12,500 pounds (5,670 kg) or less.**
>
> **Where a state highway department specification is to be used in lieu
> of this specification, the state specification must have a
> demonstrated satisfactory performance record under equivalent loadings
> and exposure. When a density requirement is not specified by a state
> specification, it is to be modified to incorporate the language found
> in paragraphs 403-5.1, 403-5.2 and 403-5.3. When state highway
> specification are approved, include all applicable/approved state
> specifications in the contract documents.**

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MATERIALS

**403‑2.1 AGGREGATE.** Aggregates shall consist of crushed stone,
crushed gravel, or crushed slag with or without natural sand or other
inert finely divided mineral aggregate. The portion of combined
materials retained on the No. 4 (4.75 mm) sieve is coarse aggregate. The
portion of combined materials passing the No. 4 (4.75 mm) sieve and
retained on the No. 200 (0.075 mm) sieve is fine aggregate, and the
portion passing the No. 200 (0.075 mm) sieve is mineral filler.

**a. Coarse Aggregate.** Coarse aggregate shall consist of sound, tough,
durable particles, free from adherent films of matter that would prevent
thorough coating and bonding with the bituminous material and be free
from organic matter and other deleterious substances. The percentage of
wear shall not be greater than **\[ \]** percent when tested in
accordance with ASTM C 131. The sodium sulfate soundness loss shall not
exceed 10 percent, or the magnesium sulfate soundness loss shall not
exceed 13 percent, after five cycles, when tested in accordance with
ASTM C 88.

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> **Percentage of wear shall not exceed 40 for surface, binder, and
> leveling courses and 50 for base course. Aggregates with a higher
> percentage loss of wear or soundness may be specified in lieu of those
> indicated, provided a satisfactory service record under similar
> conditions of service and exposure has been demonstrated.**

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Aggregate shall contain at least **\[ \]** percent by weight of
individual pieces having two or more fractured faces and **\[ \]**
percent by weight having at least one fractured face. The area of each
face shall be equal to at least 75 percent of the smallest midsectional
area of the piece. When two fractured faces are contiguous, the angle
between the planes of fractures shall be at least 30 degrees to count as
two fractured faces. Fractured faces shall be obtained by crushing.

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> **For pavement courses designed for aircraft gross weights of 60,000
> pounds (27 200 kg) or more, the Engineer shall specify 70 percent for
> two fractured faces and 85 percent for one fractured face. For
> pavement courses designed for aircraft gross weights less than 60,000
> pounds (27 200 kg), the Engineer shall specify 50 percent for two
> fractured faces and 65 percent for one fractured face.**
>
> **In areas where slag is not available or desired, the references to
> it should be deleted from all aggregate paragraphs.**

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The aggregate shall not contain more than a total of 8 percent, by
weight, of flat particles*,* elongated particles, and flat and elongated
particles*,* when tested in accordance with ASTM D 4791 with a value of
5:1.

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> **The Engineer may specify ASTM D 4791 with a ratio of 3:1. If so,
> replace the above paragraph as follows: "The aggregate shall not
> contain more than a total of 20 percent by weight of flat particles,
> elongated particles, and flat and elongated particles when tested in
> accordance with ASTM D4791 with a value of 3:1."**

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Slag shall be air‑cooled, blast furnace slag, and shall have a compacted
weight of not less than 70 pounds per cubic foot (1.12 mg/cubic meter)
when tested in accordance with ASTM C 29.

**b. Fine Aggregate.** Fine aggregate shall consist of clean, sound,
durable, angular shaped particles produced by crushing stone, slag, or
gravel that meets the requirements for wear and soundness specified for
coarse aggregate. The aggregate particles shall be free from coatings of
clay, silt, or other objectionable matter and shall contain no clay
balls. The fine aggregate, including any blended material for the fine
aggregate, shall have a plasticity index of not more than 6 and a liquid
limit of not more than 25 when tested in accordance with ASTM D 4318.

Natural (nonmanufactured) sand may be used to obtain the gradation of
the aggregate blend or to improve the workability of the mix. The amount
of sand to be added will be adjusted to produce mixtures conforming to
requirements of this specification. **\[**The fine aggregate shall not
contain more than 15 percent natural sand by weight of total
aggregates.**\]** If used, the natural sand shall meet the requirements
of ASTM D 1073 and shall have a plasticity index of not more than 6 and
a liquid limit of not more than 25 when tested in accordance with ASTM D
4318.

The aggregate shall have sand equivalent values of **\[ \]** or greater
when tested in accordance with ASTM D 2419.

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> **Typically the sand equivalent value should be 45, unless local
> conditions require lower value.**
>
> **The addition of natural sand to a mix containing all crushed coarse
> and fine aggregates will normally increase its workability and
> compactability. However, the addition of excessive amounts of natural
> sand tends to decrease the stability of the mixture. The requirement
> for a sand equivalent value of 45 usually limits the use of natural
> sand; however, the maximum of 15 percent natural sand may be included
> for locations where low stabilities are a chronic problem.**

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**c. Sampling.** ASTM D 75 shall be used in sampling coarse and fine
aggregate, and ASTM C 183 shall be used in sampling mineral filler.

**403‑2.2 MINERAL FILLER.** If filler, in addition to that naturally
present in the aggregate, is necessary, it shall meet the requirements
of ASTM D 242.

**403‑2.3 BITUMINOUS MATERIAL.** Bituminous material shall conform to
the following requirements: **\[ \]**.

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> **Asphalt cement binder shall conform to \[AASHTO MP1 Performance
> Grade (PG) \[\_\_\_\_\_\]\] \[ASTM D 3381 Table 1, 2, or 3 Viscosity
> Grade\]\[ASTM D 946 Penetration Grade \[\_\_\_\_\_\]\]. Test data
> indicating grade certification shall be provided by the supplier at
> the time of delivery of each load to the mix plant. Copies of these
> certifications shall be submitted to the Engineer. The Engineer shall
> specify the grade of bituminous material, based on geographical
> location and climatic conditions. Asphalt Institute Superpave Series
> No. 1 (SP-1) provides guidance on the selection of performance graded
> binders. Table VI‑1, Selecting Asphalt Grade, contained in the Asphalt
> Institute\'s Manual Series‑1 (MS‑1) provides guidance on the selection
> of asphalt type. For cold climates, Table 2 of ASTM D 3381 may be
> specified to minimize the susceptibility for thermal cracking. The
> Engineer should be aware that PG asphalt binders may contain modifiers
> that require elevated mixing and compaction temperatures that exceed
> the temperatures specified in Item P-403.**
>
> **Grades of some materials are listed below:**
>
> **NOTE: Performance Graded (PG) asphalt binders should be specified
> wherever available. The same grade PG binder used by the state highway
> department in the area should be considered as the base grade for the
> project (e.g. the grade typically specified in that specific location
> for dense graded mixes on highways with design ESALS less than 10
> million). The exception would be that grades with a low temperature
> higher than PG XX-22 should not be used (e.g. PG XX-16 or PG XX-10),
> unless the Engineer has had successful experience with them.
> Typically, rutting is not a problem on airport runways. However, at
> airports with a history of stacking on end of runways and taxiway
> areas, rutting has accrued due to the slow speed of loading on the
> pavement. If there has been rutting on the project or it is
> anticipated that stacking may accrue during the design life of the
> project, then the following grade \"bumping\" should be applied for
> the top 125 mm (5 inches) of paving in the end of runway and taxiway
> areas: for aircraft tire pressure between 100 and 200 psi, increase
> the high temperature one grade; for aircraft tire pressure greater
> than 200 psi, increase the high temperature two grades. Each grade
> adjustment is 6 degrees C. Polymer Modified Asphalt, PMA, has shown to
> perform very well in these areas. The low temperature grade should
> remain the same.**
>
> **Additional grade bumping and grade selection information is given in
> Table A.**

+-----------------------+----------------------+----------------------+
| > **TABLE A. BINDER   |                      |                      |
| > GRADE SELECTION AND |                      |                      |
| > GRADE BUMPING**     |                      |                      |
| >                     |                      |                      |
| > **BASED ON GROSS    |                      |                      |
| > AIRCRAFT WEIGHT.**  |                      |                      |
+-----------------------+----------------------+----------------------+
| **Aircraft Gross      | > **High Temperature |                      |
| Weight**              | > Adjustment to**    |                      |
|                       | >                    |                      |
| > **(pounds)**        | > **Base Binder      |                      |
|                       | > Grade**            |                      |
+-----------------------+----------------------+----------------------+
|                       | > **Pavement Type**  |                      |
+-----------------------+----------------------+----------------------+
|                       | > **Runway**         | > **Taxiway/Apron**  |
+-----------------------+----------------------+----------------------+
| > **Less than         | > **\--**            | > **\--**            |
| > 12,500**            |                      |                      |
+-----------------------+----------------------+----------------------+
| > **Less than         | > **\--**            | > **1**              |
| > 60,000**            |                      |                      |
+-----------------------+----------------------+----------------------+
| > **Less than         | > **\--**            | > **1**              |
| > 100,000**           |                      |                      |
+-----------------------+----------------------+----------------------+
| > **Greater than      | > **1**              | > **2**              |
| > 100,000**           |                      |                      |
+-----------------------+----------------------+----------------------+
| > **NOTES:**          |                      |                      |
| >                     |                      |                      |
| > **1. PG grades      |                      |                      |
| > above a --22 on the |                      |                      |
| > low end (e.g.       |                      |                      |
| > 64--16) are not     |                      |                      |
| > recommended.        |                      |                      |
| > Limited experience  |                      |                      |
| > has shown this to   |                      |                      |
| > be a poor           |                      |                      |
| > performer.**        |                      |                      |
| >                     |                      |                      |
| > **2. PG grades      |                      |                      |
| > below a 64 on the   |                      |                      |
| > high end (e.g.      |                      |                      |
| > 58-22) are not      |                      |                      |
| > recommended. These  |                      |                      |
| > binders often       |                      |                      |
| > provide tender      |                      |                      |
| > tendencies.**       |                      |                      |
| >                     |                      |                      |
| > **3. PG grades      |                      |                      |
| > above a 76 on the   |                      |                      |
| > high end (e.g.      |                      |                      |
| > 82-22) are very     |                      |                      |
| > stiff and may be    |                      |                      |
| > difficult to work   |                      |                      |
| > and compact.**      |                      |                      |
+-----------------------+----------------------+----------------------+

+------------+---------+-----------+----------------------------------+
| **Grade    |         |           |                                  |
| Speci      |         |           |                                  |
| fication** |         |           |                                  |
+------------+---------+-----------+----------------------------------+
| **P        | **Vi    |           | > **Performance Graded**         |
| enetration | scosity |           | >                                |
| Grade**    | Grade** |           | > **Asphalt Institute**          |
|            |         |           | >                                |
| **ASTM D   | >       |           | > **Superpave Series No.         |
| 946**      |  **ASTM |           | > 1(SP-1)**                      |
|            | > D     |           |                                  |
|            | >       |           |                                  |
|            |  3381** |           |                                  |
+------------+---------+-----------+----------------------------------+
| >          | > *     | > **      | > **In general, the Engineer     |
|  **40‑50** | *AC‑5** | AR‑1000** | > should choose a PG‑asphalt     |
| >          | >       | >         | > binder that has been approved  |
| >          | > **    | > **      | > for use in the vicinity by the |
|  **60‑70** | AC‑10** | AR‑2000** | > State DOT, and is locally      |
| >          | >       | >         | > available. In general, a high  |
| >          | > **    | > **      | > reliability (98 percent) on    |
| **85‑100** | AC‑15** | AR‑4000** | > both the high and low          |
| >          | >       | >         | > temperature categories is      |
| > *        | > **    | > **      | > sufficiently conservative.**   |
| *100‑120** | AC‑20** | AR‑8000** |                                  |
| >          | >       |           |                                  |
| > *        | > **    |           |                                  |
| *120‑150** | AC‑30** |           |                                  |
|            | >       |           |                                  |
|            | > **    |           |                                  |
|            | AC‑40** |           |                                  |
+------------+---------+-----------+----------------------------------+

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The Contractor shall furnish vendor\'s certified test reports for each
lot of bituminous material shipped to the project. The vendor\'s
certified test report for the bituminous material can be used for
acceptance or tested independently by the Engineer.

**403‑2.4 PRELIMINARY MATERIAL ACCEPTANCE.** Prior to delivery of
materials to the job site, the Contractor shall submit certified test
reports to the Engineer for the following materials:

**a. Coarse Aggregate.**

**(1)** Percent of wear.

**(2)** Soundness.

(3) Unit weight of slag.

(4) Percent fractured faces

**b. Fine Aggregate.**

**(1)** Liquid limit.

**(2)** Plasticity index.

**(3)** Sand equivalent.

**c. Mineral Filler.**

**d. Bituminous Material.** Test results for bituminous material shall
include temperature/viscosity charts for mixing and compaction
temperatures.

The certification(s) shall show the appropriate ASTM test(s) for each
material, the test results, and a statement that the material meets the
specification requirement.

The Engineer may request samples for testing, prior to and during
production, to verify the quality of the materials and to ensure
conformance with the applicable specifications.

**403-2.5 ANTI-STRIPPING AGENT.** Any anti-stripping agent or additive
if required shall be heat stable, shall not change the asphalt cement
viscosity beyond specifications, shall contain no harmful ingredients,
shall be added in recommended proportion by approved method, and shall
be a material approved by the Department of Transportation of the State
in which the project is located.

COMPOSITION

**403‑3.1 COMPOSITION OF MIXTURE.** The bituminous plant mix shall be
composed of a mixture of well‑graded aggregate, filler and anti-strip
agent if required, and bituminous material. The several aggregate
fractions shall be sized, handled in separate size groups, and combined
in such proportions that the resulting mixture meets the grading
requirements of the job mix formula (JMF).

**403‑3.2 JOB MIX FORMULA.** No bituminous mixture for payment shall be
produced until a job mix formula has been approved in writing by the
Engineer. The bituminous mixture shall be designed using procedures
contained in Chapter 5, MARSHALL METHOD OF MIX DESIGN, of the Asphalt
Institute\'s Manual Series No. 2 (MS‑2), Mix Design Methods for Asphalt
Concrete, sixth edition, and shall meet the requirements of Tables 1, 2
and 3.

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> **Engineer may specify the Eastern Region Laboratory Procedures Manual
> (ERLPM), Section 2 in lieu of MS-2.**

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Tensile Strength Ratio (TSR) of the composite mixture, as determined by
ASTM D 4867, shall not be less than 75. Anti‑stripping agent shall be
added to the asphalt, as necessary, to produce a TSR of not less than
75. If an antistrip agent is required, it will be provided by the
Contractor at no additional cost to the Owner.

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> **Engineer may specify a TSR of not less than 80 in areas that are
> prone to stripping at a TSR of 75.**

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The job mix formula shall be submitted in writing by the Contractor to
the Engineer at least **\[ \]** days prior to the start of paving
operations and shall include as a minimum:

**a.** Percent passing each sieve size for total combined gradation,
individual gradation of all aggregate stockpiles and percent by weight
of each stockpile used in the job mix formula.

**b.** Percent of asphalt cement.

**c.** Asphalt performance, viscosity or penetration grade, and type of
modifier if used.

**d.** Number of blows of hammer compaction per side of molded specimen.

**e.** Mixing temperature.

**f.** Compaction temperature.

**g.** Temperature of mix when discharged from the mixer.

**h.** Temperature‑viscosity relationship of the asphalt cement.

**i.** Plot of the combined gradation on the Federal Highway
Administration (FHWA) 45 power gradation curve.

**j.** Graphical plots of stability, flow, air voids, voids in the
mineral aggregate, and unit weight versus asphalt content.

**k.** Percent natural sand.

**l.** Percent fractured faces.

**m.** Percent by weight of flat particles, elongated particles, and
flat and elongated particles (and criteria).

**n.** Tensile Strength Ratio (TSR).

**o.** Antistrip agent (if required).

The Contractor shall submit to the Engineer the results of verification
testing of three (3) asphalt samples prepared at the optimum asphalt
content. The average of the results of this testing shall indicate
conformance with the job mix formula requirements specified in Tables 1,
2 and 3.

When the project requires asphalt mixtures of differing aggregate
gradations, a separate job mix formula and the results of job mix
formula verification testing must be submitted for each mix.

The job mix formula for each mixture shall be in effect until a
modification is approved in writing by the Engineer. Should a change in
sources of materials be made, a new job mix formula must be submitted
within \[ \] days and approved by the Engineer in writing before the new
material is used. After the initial production job mix formula(s)
has/have been approved by the Engineer and a new or modified job mix
formula is required for whatever reason, the subsequent cost of the
Engineer's approval of the new or modified job mix formula will be borne
by the Contractor. There will be no time extension given or
considerations for extra costs associated with the stoppage of
production paving or restart of production paving due to the time needed
for the Engineer to approve the initial, new or modified job mix
formula.

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> **The Engineer shall specify the number of days. A minimum of 10 days
> is recommended.**
>
> **For mixes with maximum size aggregate of 1\" or less, the Marshall
> Design Criteria applicable to the project shall be specified by the
> Engineer from the information shown below and inserted into Table 1.
> Asterisks denote insert points.**

+---------------------+-------------------------+---------------------+
| **Test Property**   | **Pavements Designed    | **Pavements         |
|                     | for Aircraft Gross      | Designed for        |
|                     | Weights of 60,000 Lbs.  | Aircraft Gross      |
|                     | or More or Tire         | Weights Less Than   |
|                     | Pressures of 100 Psi or | 60,000 Lbs. or Tire |
|                     | More**                  | Pressures Less Than |
|                     |                         | 100 Psi**           |
+=====================+=========================+=====================+
| **Number of Blows** | **75**                  | **50**              |
+---------------------+-------------------------+---------------------+
| **Stability, pounds | **1800 (8006)**         | **1000 (4448)**     |
| (newtons)**         |                         |                     |
+---------------------+-------------------------+---------------------+
| **Flow, 0.01 in.**  | **8-16**                | **8-20**            |
|                     |                         |                     |
| **(0.25 mm)**       |                         |                     |
+---------------------+-------------------------+---------------------+
| **Air Voids**       | **2-5**                 | **2-5**             |
|                     |                         |                     |
| **(percent)**       |                         |                     |
+---------------------+-------------------------+---------------------+
| **Percent Voids     | **See Table 2**         | **See Table 2**     |
| in**                |                         |                     |
|                     |                         |                     |
| **Mineral           |                         |                     |
| Aggregate**         |                         |                     |
|                     |                         |                     |
| **(minimum)**       |                         |                     |
+---------------------+-------------------------+---------------------+

**For mixes with maximum size aggregate greater than 1 inch up to a
maximum of 1-½ inches, the Marshall Design Criteria shall be modified by
the Engineer per the guidance found in Asphalt Institute Manual Series
No. 2 (MS-2), Chapter 5 and the test method specified shall be ASTM D
5581 in lieu of ASTM D 6926. Modifications to the flow criteria may be
required for modified asphalt cement binders.**

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  ----------------------------------- -----------------------------------
  **TABLE 1. MARSHALL DESIGN          
  CRITERIA**                          

  TEST PROPERTY                       \*

  Number of blows                     \*

  Stability, pounds (newtons) minimum \*

  (newtons) minimum                   

  Flow, 0.01 in. (0.25 mm)            \*

  Air voids (percent)                 \*

  Percent voids in mineral aggregate, See Table 2
  minimum                             
  ----------------------------------- -----------------------------------

+---------------------+---------------------+-------------------------+
| **TABLE 2. MINIMUM  |                     |                         |
| PERCENT**           |                     |                         |
|                     |                     |                         |
| **VOIDS IN MINERAL  |                     |                         |
| AGGREGATE**         |                     |                         |
+---------------------+---------------------+-------------------------+
| Maximum Particle    |                     | Minimum Voids in        |
| Size                |                     | Mineral Aggregate,      |
|                     |                     | percent                 |
+---------------------+---------------------+-------------------------+
| in.                 | mm                  | Percent                 |
+---------------------+---------------------+-------------------------+
| ½                   | 12.5                | 16                      |
+---------------------+---------------------+-------------------------+
| ¾                   | 19.0                | 15                      |
+---------------------+---------------------+-------------------------+
| 1                   | 25.0                | 14                      |
+---------------------+---------------------+-------------------------+
| 1-½                 | 37.5                | 13                      |
+---------------------+---------------------+-------------------------+

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> **Modifications to the minimum VMA as found in Table 2 may be made
> depending on the definition of maximum particle size and/or local
> conditions.**

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The mineral aggregate shall be of such size that the percentage
composition by weight, as determined by laboratory sieves, will conform
to the gradation or gradations specified in Table 3 when tested in
accordance with ASTM C 136 and C 117.

The gradations in Table 3 represent the limits that shall determine the
suitability of aggregate for use from the sources of supply. The
aggregate, as selected (and used in the JMF), shall have a gradation
within the limits designated in Table 3 and shall not vary from the low
limit on one sieve to the high limit on the adjacent sieve, or vice
versa, but shall be well graded from coarse to fine.

Deviations from the final approved mix design for bitumen content and
gradation of aggregates shall be within the action limits for individual
measurements as specified in paragraph 403‑6.5a. The limits still will
apply if they fall outside the master grading band in Table 3.

The maximum size aggregate used shall not be more than one‑half of the
thickness of the course being constructed except where otherwise shown
on the plans or ordered by the Engineer.

+-----------------------------------+-----------------------------------+
| **TABLE 3. AGGREGATE ‑ BITUMINOUS |                                   |
| PAVEMENTS**                       |                                   |
+-----------------------------------+-----------------------------------+
| Sieve Size                        | Percentage by Weight Passing      |
|                                   | Sieve                             |
+-----------------------------------+-----------------------------------+
| 1‑½ in. (37.50 mm)                | \*                                |
+-----------------------------------+-----------------------------------+
| 1 in. (25.0 mm)                   | \*                                |
+-----------------------------------+-----------------------------------+
| ¾ in. (19.0 mm)                   | \*                                |
+-----------------------------------+-----------------------------------+
| ½ in. (12.5 mm)                   | \*                                |
+-----------------------------------+-----------------------------------+
| ⅜ in. (9.5 mm)                    | \*                                |
+-----------------------------------+-----------------------------------+
| No. 4 (4.75 mm)                   | \*                                |
+-----------------------------------+-----------------------------------+
| No. 8 (2.36 mm)                   | \*                                |
+-----------------------------------+-----------------------------------+
| No. 16 (1.18 mm)                  | \*                                |
+-----------------------------------+-----------------------------------+
| No. 30 (0.60 mm)                  | \*                                |
+-----------------------------------+-----------------------------------+
| No. 50 (0.30 mm)                  | \*                                |
+-----------------------------------+-----------------------------------+
| No. 100 (0.15 mm)                 | \*                                |
+-----------------------------------+-----------------------------------+
| No. 200 (0.075 mm)                | \*                                |
+-----------------------------------+-----------------------------------+
| Asphalt percent                   | \*                                |
|                                   |                                   |
| Stone or gravel                   | \*                                |
|                                   |                                   |
| Slag                              |                                   |
+-----------------------------------+-----------------------------------+

The aggregate gradations shown are based on aggregates of uniform
specific gravity. The percentages passing the various sieves shall be
corrected when aggregates of varying specific gravities are used, as
indicated in the Asphalt Institute Manual Series No. 2 (MS‑2), Chapter
3.

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **The aggregate gradation shall be specified by the Engineer from the
> gradations shown in this note. The gradation shall be inserted into
> Table 3. Asterisks denote insert points.**
>
> **Where locally‑available aggregates cannot be economically blended to
> meet the grading requirements of the gradations shown, the gradations
> may be modified to fit the characteristics of such local aggregates
> with approval of the FAA. The modified gradation must produce a paving
> mixture that satisfies the mix design requirements.**

+--------------------+-----------+-----------+-----------+-----------+
| #                  |           |           |           |           |
| ### AGGREGATE ‑ BI |           |           |           |           |
| TUMINOUS PAVEMENTS |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **Sieve Size**     | **P       |           |           |           |
|                    | ercentage |           |           |           |
|                    | by Weight |           |           |           |
|                    | Passing   |           |           |           |
|                    | Sieves**  |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
|                    | **1‑½"    | **1"      | **¾ "     | **½"      |
|                    | max**     | max**     | max**     | max**     |
+--------------------+-----------+-----------+-----------+-----------+
| **1‑½ in. (37.5    | **100**   | **‑‑**    | **‑‑**    | **‑‑**    |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **1 in. (24.0      | **86‑98** | **100**   | **‑‑**    | **‑‑**    |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **¾ in. (19.0      | **68‑93** | **76‑98** | **100**   | **‑‑**    |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **½ in. (12.5      | **57‑81** | **66‑86** | **79‑99** | **100**   |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **⅜ in. (9.5 mm)** | **49‑69** | **57‑77** | **68‑88** | **79‑99** |
+--------------------+-----------+-----------+-----------+-----------+
| **No. 4 (4.75      | **34‑54** | **40‑60** | **48‑68** | **58‑78** |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **No. 8 (2.36      | **22‑42** | **26‑46** | **33‑53** | **39‑59** |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **No. 16 (1.18     | **13‑33** | **17‑37** | **20‑40** | **26‑46** |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **No. 30 (0.600    | **8‑24**  | **11‑27** | **14‑30** | **19‑35** |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **No. 50 (0.300    | **6‑18**  | **7‑19**  | **9‑21**  | **12‑24** |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **No. 100 (0.150   | **4‑12**  | **6‑16**  | **6‑16**  | **7‑17**  |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **No. 200 (0.075   | **3‑6**   | **3‑6**   | **3‑6**   | **3‑6**   |
| mm)**              |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+
| **Asphalt          | **        | **        | **        | **        |
| percent:**         | 4.5‑7.0** | 4.5‑7.0** | 5.0‑7.5** | 5.5‑8.0** |
|                    |           |           |           |           |
| **Stone or         | **        | **        | **        | **7       |
| gravel**           | 5.0‑7.5** | 5.0‑7.5** | 6.5‑9.5** | .0‑10.5** |
|                    |           |           |           |           |
| **Slag**           |           |           |           |           |
+--------------------+-----------+-----------+-----------+-----------+

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

**403‑3.3 RECYCLED ASPHALT CONCRETE.** Recycled HMA shall consist of
reclaimed asphalt pavement (RAP), coarse aggregate, fine aggregate,
mineral filler, and asphalt cement. The RAP shall be of a consistent
gradation and asphalt content and properties. When RAP is fed into the
plant, the maximum RAP chunk size shall not exceed 2 inches. The
recycled HMA mix shall be designed using procedures contained in AI
MS-02. The recycled asphalt concrete mix shall be designed using
procedures contained in the Asphalt Institute\'s Manual Series Number 2
(MS‑2). The percentage of asphalt in the RAP shall be established for
the mixture design according to ASTM D 2172 using the appropriate dust
correction procedure. The job mix shall meet the requirements of
paragraph 403‑3.2 RAP should only be used for shoulder surface course
mixes and for any intermediate courses. The amount of RAP shall be
limited to **\[ \]** percent.

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\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **Reclaimed Asphalt Pavement (RAP) should not be used for surface
> mixes, except on shoulders. It can be used very effectively in lower
> layers or for shoulders. Engineer to specify the maximum percentage of
> reclaimed asphalt allowed in the mix. The amount of RAP shall be
> limited to 30 percent, as long as the resulting recycled mix meets all
> requirements that are specified for virgin mixtures. The Contractor
> may obtain the RAP from the job site or an existing source.**

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

In addition to the requirements of paragraph 403‑3.2, the job mix
formula shall indicate the percent of reclaimed asphalt pavement and the
percent and viscosity grade of new asphalt. The Contractor shall submit
documentation to the Engineer, indicating that the mixing equipment
proposed for use is adequate to mix the percent of RAP shown in the job
mix formula and meet all local and national environmental regulations.

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **The appropriate test should be selected to conform to the grade of
> new asphalt specified. If a penetration grade is specified, use
> penetration test. If a viscosity grade is specified, use a viscosity
> test. If a PG asphalt binder is specified, use the dynamic shear
> rheometer and bending beam tests. RAP containing coal tars may be
> require additional precautions during production and may be
> excluded.**

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\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

The blend of new asphalt cement and the RAP asphalt binder shall meet
the requirements in paragraph 403-2.3. The virgin asphalt cement shall
not be more than two standard asphalt material grades different than
that specified in paragraph 403-2.3

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **Delete paragraph 403-3.3 in its entirety if recycled asphalt
> pavement is not to be allowed and include a sentence that RAP will not
> be permitted to be used.**

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

**403‑3.4 TEST SECTION.** Prior to full production, the Contractor shall
prepare and place a quantity of bituminous mixture according to the job
mix formula. The amount of mixture shall be sufficient to construct a
test section **\[ \]** long and **\[ \]** wide**,** placed in two lanes,
with a longitudinal cold joint, and shall be of the same depth specified
for the construction of the course which it represents. A cold joint is
an exposed construction joint at least 4 hours old or whose mat has
cooled to less than 160°F. The underlying grade or pavement structure
upon which the test section is to be constructed shall be the same as
the remainder of the course represented by the test section. The
equipment used in construction of the test section shall be the same
type and weight to be used on the remainder of the course represented by
the test section.

THE TEST SECTION SHALL BE EVALUATED FOR ACCEPTANCE AS A SINGLE LOT IN
ACCORDANCE WITH THE ACCEPTANCE CRITERIA IN PARAGRAPH 403-5.1 AND
403-6.3. THE TEST SECTION SHALL BE DIVIDED INTO EQUAL SUBLOTS. AS A
MINIMUM THE TEST SECTION SHALL CONSIST OF 3 SUBLOTS.

The test section shall be considered acceptable if the average mat
density of the test section cores is greater than or equal to 98 percent
and the average joint density of the test section cores is greater than
or equal to 95 percent. If the initial test section should prove to be
unacceptable, the necessary adjustments to the job mix formula, plant
operation, placing procedures, and/or rolling procedures shall be made.
A second test section shall then be placed. If the second test section
also does not meet specification requirements, both sections shall be
removed at the Contractor\'s expense. Additional test sections, as
required, shall be constructed and evaluated for conformance to the
specifications. Any additional sections that are not acceptable shall be
removed at the Contractor\'s expense. Full production shall not begin
until an acceptable section has been constructed and accepted in writing
by the Engineer. Once an acceptable test section has been placed,
payment for the initial test section and the section that meets
specification requirements shall be made in accordance with paragraph
403‑8.1.

Job mix control testing shall be performed by the Contractor at the
start of plant production and in conjunction with the calibration of the
plant for the job mix formula. If the aggregates produced by the plant
do not satisfy the gradation requirements or produce a mix that meets
the JMF, it will be necessary to reevaluate and redesign the mix using
plant‑produced aggregates. Specimens shall be prepared and the optimum
bitumen content determined in the same manner as for the original design
tests.

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **The test section should be a minimum of 300 feet (90 m) long and 20
> to 30 feet (6 to 9 m) wide. The test section affords the Contractor
> and the Engineer an opportunity to determine the quality of the
> mixture in place, as well as performance of the plant and laydown
> equipment.**

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

**403‑3.5 TESTING LABORATORY.** The Contractor's laboratory used to
develop the job mix formula shall meet the requirements of ASTM D 3666
including the requirement to be accredited by a national authority such
as the National Voluntary Laboratory Accreditation Program (NVLAP), the
American Association for Laboratory Accreditation (AALA), or AASHTO
Accreditation Program (AAP). A certification signed by the manager of
the laboratory stating that it meets these requirements shall be
submitted to the Engineer prior to the start of construction. The
certification shall contain as a minimum:

**a.** Qualifications of personnel; laboratory manager, supervising
technician, and testing technicians.

**b.** A listing of equipment to be used in developing the job mix.

**c.** A copy of the laboratory\'s quality control system.

**d.** Evidence of participation in the AASHTO Materials Reference
Laboratory (AMRL) program.

**e.** ASTM D 3666 certification of accreditation by a nationally
recognized accreditation program.

CONSTRUCTION METHODS

**403‑4.1 WEATHER LIMITATIONS.** The bituminous mixture shall not be
placed upon a wet surface or when the surface temperature of the
underlying course is less than specified in Table 4. The temperature
requirements may be waived by the Engineer, if requested; however, all
other requirements including compaction shall be met.

**TABLE 4. BASE TEMPERATURE LIMITATIONS**

+------------------------------+-------------------+-------------------+
| Mat Thickness                | Base Temperature  |                   |
|                              | (Minimum)         |                   |
+------------------------------+-------------------+-------------------+
|                              | Deg. F            | Deg. C            |
+------------------------------+-------------------+-------------------+
| 3 in. (7.5 cm) or greater    | 40                | 4                 |
+------------------------------+-------------------+-------------------+
| Greater than 1 in. (2.5 cm)  | 45                | 7                 |
|                              |                   |                   |
| but less than 3 in. (7.5 cm) |                   |                   |
+------------------------------+-------------------+-------------------+
| 1 in. (2.5 cm) or less       | 50                | 10                |
+------------------------------+-------------------+-------------------+

**403‑4.2 BITUMINOUS MIXING PLANT.** Plants used for the preparation of
bituminous mixtures shall conform to the requirements of ASTM D 995 with
the following changes:

**a. Requirements for All Plants.**

**(1) Truck Scales.** The bituminous mixture shall be weighed on
approved scales furnished by the Contractor, or on certified public
scales at the Contractor\'s expense. Scales shall be inspected and
sealed as often as the Engineer deems necessary to assure their
accuracy. Scales shall conform to the requirements of the General
Provisions, Section 90‑01.

In lieu of scales, and as approved by the Engineer, asphalt mixture
weights may be determined by the use of an electronic weighing system
equipped with an automatic printer that weighs the total paving mixture.
Contractor must furnish calibration certification of the weighing system
prior to mix production and as often thereafter as requested by the
Engineer.

**(2) Testing Facilities.** The Contractor shall provide laboratory
facilities at the plant for the use of the Engineer\'s acceptance
testing and the Contractor\'s quality control testing. The Engineer will
always have priority in the use of the laboratory. The lab shall have
sufficient space and equipment so that both testing representatives
(Engineer's and Contractor's) can operate efficiently. The lab shall
also meet the requirements of ASTM D 3666.

The plant testing laboratory shall have a floor space area of not less
than 150 square feet, with a ceiling height of not less than 7-½ feet.
The laboratory shall be weather tight, sufficiently heated in cold
weather, air-conditioned in hot weather to maintain temperatures for
testing purposes of 70 degrees F +/- 5 degrees F. The plant testing
laboratory shall be located on the plant site to provide an unobstructed
view, from one of its windows, of the trucks being loaded with the plant
mix materials.

Laboratory facilities shall be kept clean, and all equipment shall be
maintained in proper working condition. The Engineer shall be permitted
unrestricted access to inspect the Contractor's laboratory facility and
witness quality control activities. The Engineer will advise the
Contractor in writing of any noted deficiencies concerning the
laboratory facility, equipment, supplies, or testing personnel and
procedures. When the deficiencies are serious enough to be adversely
affecting the test results, the incorporation of the materials into the
work shall be suspended immediately and will not be permitted to resume
until the deficiencies are satisfactorily corrected.

As a minimum, the plant testing laboratory shall have:

**(a)** Adequate artificial lighting

**(b)** Electrical outlets sufficient in number and capacity for
operating the required testing equipment and drying samples.

**(c)** Fire extinguishers (2), Underwriter's Laboratories approved

**(d)** Work benches for testing, minimum 2-½ feet by 10 feet.

**(e)** Desk with 2 chairs

**(f)** Sanitary facilities convenient to testing laboratory

**(g)** Exhaust fan to outside air, minimum 12 inch blade diameter

**(h)** A direct telephone line and telephone including a FAX machine
operating 24 hours per day, seven days per week

**(i)** File cabinet with lock for Engineer

**(j)** Sink with running water, attached drain board and drain capable
of handling separate material

**(k)** Metal stand for holding washing sieves

**(l)** Two element hot plate or other comparable heating device, with
dial type thermostatic controls for drying aggregates

**(m)** Mechanical shaker and appropriate sieves (listed in JMF, Table
3) meeting the requirements of ASTM E-11 for determining the gradation
of coarse and fine aggregates in accordance with ASTM C 136

**(n)** Marshall testing equipment meeting ASTM D 6926, ASTM D 6927, or
ASTM D 5581 as necessary, automatic compaction equipment capable of
compacting three specimens at once and other apparatus as specified in
ASTM C 127, D 2172, D 2726, and D 2041

**(o)** Oven, thermostatically controlled, inside minimum 1 cubic foot

**(p)** Two volumetric specific gravity flasks, 500 CC

**(q)** Other necessary hand tools required for sampling and testing

**(r)** Library containing contract specifications, latest ASTM volumes
4.01, 4.02,4.03 and 4.09, AASHTO standard specification parts I and II,
and Asphalt Institute Publication MS-2.

**(s)** Equipment for Theoretical Specific Gravity testing including a
4,000 cc pycnometer, vacuum pump capable of maintaining 30 ml mercury
pressure and a balance, 16-20 kilograms with accuracy of 0.5 grams

**(t)** Extraction equipment, centrifuge and reflux types and ROTOflex
equipment

**(u)** A masonry saw with diamond blade for trimming pavement cores and
samples

**(v)** Telephone

Approval of the plant and testing laboratory by the Engineer requires
all facilities and equipment to be in good working order during
production, sampling and testing. Failure to provide the specified
facilities shall be sufficient cause for disapproving bituminous plant
operations.

The Owner shall have access to the lab and at the plant whenever
Contractor is producing asphalt for the project.

**(3) Inspection of Plant.** The Engineer, or Engineer\'s authorized
representative, shall have access, at all times, to all areas of the
plant for checking adequacy of equipment; inspecting operation of the
plant: verifying weights, proportions, and material properties; and
checking the temperatures maintained in the preparation of the mixtures.

**(4) Storage Bins and Surge Bins.** Use of surge bins or storage bins
for temporary storage of hot bituminous mixtures will be permitted as
follows:

**(a)** The bituminous mixture may be stored in surge bins for a period
of time not to exceed 3 hours.

**(b)** The bituminous mixture may be stored in insulated storage bins
for a period of time not to exceed 24 hours**.**

The bins shall be such that mix drawn from them meets the same
requirements as mix loaded directly into trucks.

If the Engineer determines that there is an excessive amount of heat
loss, segregation or oxidation of the mixture due to temporary storage,
no temporary storage will be allowed.

**403‑4.3 HAULING EQUIPMENT.** Trucks used for hauling bituminous
mixtures shall have tight, clean, and smooth metal beds. To prevent the
mixture from adhering to them, the truck beds shall be lightly coated
with a minimum amount of an approved asphalt release agent. Petroleum
products shall not be used for coating truck beds. Each truck shall have
a suitable cover to protect the mixture from adverse weather. When
necessary, to ensure that the mixture will be delivered to the site at
the specified temperature, truck beds shall be insulated or heated and
covers shall be securely fastened.

**403‑4.4 BITUMINOUS PAVERS.** Bituminous pavers shall be self‑propelled
with an activated heated screed, capable of spreading and finishing
courses of bituminous plant mix material that will meet the specified
thickness, smoothness, and grade. The paver shall have sufficient power
to propel itself and the hauling equipment without adversely affecting
the finished surface.

The paver shall have a receiving hopper of sufficient capacity to permit
a uniform spreading operation. The hopper shall be equipped with a
distribution system to place the mixture uniformly in front of the
screed without segregation. The screed shall effectively produce a
finished surface of the required evenness and texture without tearing,
shoving, or gouging the mixture.

The paver shall be equipped with a control system capable of
automatically maintaining the specified screed elevation. The control
system shall be automatically actuated from either a reference line
and/or through a system of mechanical sensors or sensor‑directed
mechanisms or devices that will maintain the paver screed at a
predetermined transverse slope and at the proper elevation to obtain the
required surface. The transverse slope controller shall be capable of
maintaining the screed at the desired slope within plus or minus 0.1
percent.

The controls shall be capable of working in conjunction with any of the
following attachments:

**a.** Ski‑type device of not less than 30 feet (9.14 m) in length.

**b.** Taut stringline (wire) set to grade.

**c.** Short ski or shoe.

**d.** Laser control.

If, during construction, it is found that the spreading and finishing
equipment in use leaves tracks or indented areas, or produces other
blemishes in the pavement and/or base course that are not satisfactorily
corrected by the scheduled operations, the use of such equipment shall
be discontinued and satisfactory equipment shall be provided by the
Contractor.

**403‑4.5 ROLLERS.** Rollers of the vibratory, steel wheel, and
pneumatic‑tired type shall be used. They shall be in good condition,
capable of operating at slow speeds to avoid displacement of the
bituminous mixture. The number, type, and weight of rollers shall be
sufficient to compact the mixture to the required density while it is
still in a workable condition.

All rollers shall be specifically designed and suitable for compacting
hot mix bituminous concrete and shall be properly used. Rollers that
impair the stability of any layer of a pavement structure or underlying
soils shall not be used. Depressions in pavement surfaces caused by
rollers shall be repaired by the Contractor at its own expense.

The use of equipment that causes crushing of the aggregate will not be
permitted.

**a. Nuclear Densometer.** The Contractor shall have on site a nuclear
densometer during all paving operations in order to assist in the
determination of the optimum rolling pattern, type of roller and
frequencies, as well as to monitor the effect of the rolling operations
during production paving. The Contractor shall also supply a qualified
technician during all paving operations to calibrate the nuclear
densometer and obtain accurate density readings for all new bituminous
concrete. These densities shall be supplied to the Engineer upon request
at any time during construction. No separate payment will be made for
supplying the density gauge and technician.

**403‑4.6 PREPARATION OF BITUMINOUS MATERIAL.** The bituminous material
shall be heated in a manner that will avoid local overheating and
provide a continuous supply of the bituminous material to the mixer at a
uniform temperature. The temperature of the bituminous material
delivered to the mixer shall be sufficient to provide a suitable
viscosity for adequate coating of the aggregate particles, but shall not
exceed 325 degrees F (160 degrees C), unless otherwise required by the
manufacturer*.*

**403‑4.7 PREPARATION OF MINERAL AGGREGATE.** The aggregate for the
mixture shall be heated and dried prior to introduction into the mixer.
The maximum temperature and rate of heating shall be such that no damage
occurs to the aggregates. The temperature of the aggregate and mineral
filler shall not exceed 350 degrees F (175 degrees C) when the asphalt
is added. Particular care shall be taken that aggregates high in calcium
or magnesium content are not damaged by overheating. The temperature
shall not be lower than is required to obtain complete coating and
uniform distribution on the aggregate particles and to provide a mixture
of satisfactory workability.

**403‑4.8 PREPARATION OF BITUMINOUS MIXTURE.** The aggregates and the
bituminous material shall be weighed or metered and introduced into the
mixer in the amount specified by the job mix formula.

The combined materials shall be mixed until the aggregate obtains a
uniform coating of bitumen and is thoroughly distributed throughout the
mixture. Wet mixing time shall be the shortest time that will produce a
satisfactory mixture, but not less than 25 seconds for batch plants. The
wet mixing time for all plants shall be established by the Contractor,
based on the procedure for determining the percentage of coated
particles described in ASTM D 2489, for each individual plant and for
each type of aggregate used. The wet mixing time will be set to achieve
95 percent of coated particles. For continuous mix plants, the minimum
mixing time shall be determined by dividing the weight of its contents
at operating level by the weight of the mixture delivered per second by
the mixer. The moisture content of all bituminous mixtures upon
discharge shall not exceed 0.5 percent.

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **For batch plants, wet mixing time begins with the introduction of
> bituminous material into the mixer and ends with the opening of the
> mixer discharge gate. Distribution of aggregate and bituminous
> material as they enter the pugmill, speed of mixer shafts, and
> arrangement and pitch of paddles are factors governing efficiency of
> mixing. Prolonged exposure to air and heat in the pugmill hardens the
> asphalt film on the aggregate. Mixing time, therefore, should be the
> shortest time required to obtain uniform distribution of aggregate
> sizes and thorough coating of aggregate particles with bituminous
> material.**

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\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

**403‑4.9 PREPARATION OF THE UNDERLYING SURFACE.** Immediately before
placing the bituminous mixture, the underlying course shall be cleaned
of all dust and debris. A prime coat or tack coat shall be applied in
accordance with Item P‑602 or P‑603, if shown on the plans.

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\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **Engineer should evaluate the presence of paint and rubber deposits
> on the existing pavement and, if needed, may specify milling, grinding
> or other suitable means to remove same prior to placement of new
> bituminous material.**

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

**403‑4.10 LAYDOWN PLAN, TRANSPORTING, PLACING, AND FINISHING.** Prior
to the placement of the bituminous mixture, the Contractor shall prepare
a laydown plan for approval by the Engineer. This is to minimize the
number of cold joints in the pavement. The laydown plan shall include
the sequence of paving laydown by stations, width of lanes, temporary
ramp location(s), and laydown temperature. The laydown plan shall also
include estimated time of completion for each portion of the work (i.e.
milling, paving, rolling, cooling, etc.). Modifications to the laydown
plan shall be approved by the Engineer.

The bituminous mixture shall be transported from the mixing plant to the
site in vehicles conforming to the requirements of paragraph 403-4.3.
Deliveries shall be scheduled so that placing and compacting of mixture
is uniform with minimum stopping and starting of the paver. Hauling over
freshly placed material shall not be permitted until the material has
been compacted, as specified, and allowed to cool to atmospheric
temperature.

**\[**The Contractor may elect to use a material transfer vehicle to
deliver mix to the paver.**\]**

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> **Use of a material transfer vehicle allows the paver to be operated
> almost continuously without stopping between truckloads of mix, if a
> continuous supply of mix is available from the asphalt plant. The use
> of a transfer vehicle is recommended on long paving lanes.**

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Paving during nighttime construction shall require the following:

**a.** All paving machines, rollers, distribution trucks and other
vehicles required by the Contractor for his operations shall be equipped
with artificial illumination sufficient to safely complete the work.

**b.** Minimum illumination level shall be twenty (20) horizontal foot
candles and maintained in the following areas:

**(1)** An area of 30 feet wide by 30 feet long immediately behind the
paving machines during the operations of the machines.

**(2)** An area 15 feet wide by 30 feet long immediately in front and
back of all rolling equipment, during operation of the equipment.

**(3)** An area 15 feet wide by 15 feet long at any point where an area
is being tack coated prior to the placement of pavement.

**c.** As partial fulfillment of the above requirements, the Contractor
shall furnish and use, complete artificial lighting units with a minimum
capacity of 3,000 watt electric beam lights, affixed to all equipment in
such a way to direct illumination on the area under construction.

> **d.** In addition, the Contractor shall furnish \[ \] portable
> floodlight units similar or equal to \[ \].

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> **Engineer to specify the minimum number of floodlighting units and
> may elect to specify a particular manufacturer's lighting unit "or
> equal".**
>
> **If nighttime paving requires the critical re-opening of airfield
> facilities, the following additional language should be added:**
>
> **"If the Contractor places any out of specification mix in the
> project work area, the Contractor is required to remove it at its own
> expense, to the satisfaction of the Engineer. If the Contractor has to
> continue placing non-payment bituminous concrete, as directed by the
> Engineer, to make the surfaces safe for aircraft operations, the
> Contractor shall do so to the satisfaction of the Engineer. It is the
> Contractor's responsibility to leave the facilities to be paved in a
> safe condition ready for aircraft operations. No consideration for
> extended closure time of the area being paved will be given. As a
> first order of work for the next paving shift, the Contractor shall
> remove all out of specification material and replace with approved
> material to the satisfaction of the Engineer. When the above
> situations occur, there will be no consideration given for additional
> construction time or payment for extra costs."**

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The initial placement and compaction of the mixture shall occur at a
temperature suitable for obtaining density, surface smoothness, and
other specified requirements but not less than 250ºF (121ºC).

Edges of existing bituminous pavement abutting the new work shall be saw
cut and carefully removed as shown on the drawings and painted with
bituminous tack coat before new material is placed against it.

Upon arrival, the mixture shall be placed to the full width by a
bituminous paver. It shall be struck off in a uniform layer of such
depth that, when the work is completed, it shall have the required
thickness and conform to the grade and contour indicated. The speed of
the paver shall be regulated to eliminate pulling and tearing of the
bituminous mat. Unless otherwise permitted, placement of the mixture
shall begin along the centerline of a crowned section or on the high
side of areas with a one‑way slope. The mixture shall be placed in
consecutive adjacent strips having a minimum width of **\[ \]** except
where edge lanes require less width to complete the area. Additional
screed sections shall not be attached to widen paver to meet the minimum
lane width requirements specified above unless additional auger sections
are added to match. The longitudinal joint in one course shall offset
the longitudinal joint in the course immediately below by at least 1
foot (30 cm); however, the joint in the surface top course shall be at
the centerline of crowned pavements. Transverse joints in one course
shall be offset by at least 10 feet (3 m) from transverse joints in the
previous course.

Transverse joints in adjacent lanes shall be offset a minimum of 10 feet
(3 m).

On areas where irregularities or unavoidable obstacles make the use of
mechanical spreading and finishing equipment impractical, the mixture
may be spread and luted by hand tools. Areas of segregation in the
course, as determined by the Engineer, shall be removed and replaced at
the Contractor's expense. The area shall be removed by saw cutting and
milling a minimum of 2 inches deep. The area to be removed and replaced
shall be a minimum width of the paver and a minimum of 10 feet long.

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> **The Engineer should specify the widest paving lane practicable in an
> effort to hold the number of longitudinal joints to a minimum.**

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**403‑4.11 COMPACTION OF MIXTURE.** After placing, the mixture shall be
thoroughly and uniformly compacted by power rollers. The surface shall
be compacted as soon as possible when the mixture has attained
sufficient stability so that the rolling does not cause undue
displacement, cracking or shoving. The sequence of rolling operations
and the type of rollers used shall be at the discretion of the
Contractor. The speed of the roller shall, at all times, be sufficiently
slow to avoid displacement of the hot mixture and be effective in
compaction. Any displacement occurring as a result of reversing the
direction of the roller, or from any other cause, shall be corrected at
once.

Sufficient rollers shall be furnished to handle the output of the plant.
Rolling shall continue until the surface is of uniform texture, true to
grade and cross section, and the required field density is obtained.

To prevent adhesion of the mixture to the roller, the wheels shall be
equipped with a scraper and kept properly moistened using a water
soluble asphalt release agent approved by the engineer.

In areas not accessible to the roller, the mixture shall be thoroughly
compacted with approved power driven tampers. Tampers shall weigh not
less than 275 pounds, have a tamping plate width not less than 15
inches, be rated at not less than 4,200 vibrations per minute, and be
suitably equipped with a standard tamping plate wetting device.

Any mixture that becomes loose and broken, mixed with dirt, contains
check‑cracking, or in any way defective shall be removed and replaced
with fresh hot mixture and immediately compacted to conform to the
surrounding area. This work shall be done at the Contractor\'s expense.
Skin patching shall not be allowed.

**403‑4.12 JOINTS.** The formation of all joints shall be made in such a
manner as to ensure a continuous bond between the courses and obtain the
required density. All joints shall have the same texture as other
sections of the course and meet the requirements for smoothness and
grade.

The roller shall not pass over the unprotected end of the freshly laid
mixture except when necessary to form a transverse joint. When necessary
to form a transverse joint, it shall be made by means of placing a
bulkhead or by tapering the course. The tapered edge shall be cut back
to its full depth and width on a straight line to expose a vertical face
prior to placing the adjacent lane. In both methods, all contact
surfaces shall be given a tack coat of bituminous material before
placing any fresh mixture against the joint.

Longitudinal joints which are irregular, damaged, uncompacted, or
otherwise defective **\[**or which have been left exposed for more than
4 hours, or whose surface temperature has cooled to less than 160^0^
F**\]** shall be cut back \[specify cutback\] to expose a clean, sound
surface for the full depth of the course. All contact surfaces shall be
cleaned and dry and given a tack coat of bituminous material prior to
placing any fresh mixture against the joint. The cost of this work and
tack coat shall be considered incidental to the cost of the bituminous
course.

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> **Engineer may retain the bracketed language regarding the treatment
> of "cold joints" when considered necessary. The cutback should be no
> more than 6 inches.**

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MATERIAL ACCEPTANCE

**403‑5.1 ACCEPTANCE SAMPLING AND TESTING.** Unless otherwise specified,
all acceptance sampling and testing necessary to determine conformance
with the requirements specified in this section will be performed by the
Engineer at no cost to the Contractor. Testing organizations performing
these tests shall meet the requirements of ASTM D 3666. All equipment in
Contractor furnished laboratories shall be calibrated by the testing
organization prior to the start of operations.

**a. Field Placed Material.** Material placed in the field shall be
tested for mat and joint density on a lot basis. A lot will consist of:

-   one day or shift's production not to exceed 2,000 tons (1 814 000
    kg), or

-   a half day or shift's production where a day\'s production is
    expected to consist of between 2,000 and 4,000 tons (1 814 000 and 3
    628 000 kg), or

-   similar subdivisions for tonnages over 4,000 tons (3 628 000 kg).

Where more than one plant is simultaneously producing material for the
job, the lot sizes shall apply separately for each plant.

**(1) Mat Density.** The lot shall be divided into four equal sublots.
One core of finished, compacted materials shall be taken by the
Contractor from each sublot. Core locations will be determined by the
Engineer on a random basis in accordance with procedures contained in
ASTM D 3665. Cores shall not be taken closer than one foot from a
transverse or longitudinal joint.

**(2) Joint Density.** The lot shall be divided into four equal sublots.
One core of finished, compacted materials shall be taken by the
Contractor from each sublot. Core locations will be determined by the
Engineer on a random basis in accordance with procedures contained in
ASTM D 3665. Edge of cores will be taken within 6 inches of the joint of
the same lot material but not directly on the joint.

**(3) Sampling.** Samples shall be neatly cut with a core drill. The
cutting edge of the core drill bit shall be of hardened steel or other
suitable material with diamond chips embedded in the metal cutting edge.
The minimum diameter of the sample shall be five inches. Samples that
are clearly defective, as a result of sampling, shall be discarded and
another sample taken. The Contractor shall furnish all tools, labor, and
materials for cutting samples, cleaning, and filling the cored pavement.
Cored pavement shall be cleaned and core holes shall be filled in a
manner acceptable to the Engineer and within one day after sampling.

**(4) Testing.** The bulk specific gravity of each cored sample will be
measured by the Engineer in accordance with ASTM D 2726 or ASTM D 1188,
whichever is applicable. The percent compaction (density) of each sample
will be determined by dividing the bulk specific gravity of each sublot
sample by the average bulk specific gravity of all laboratory prepared
specimens for the lot, as determined as follows:

**(a)** Sufficient material for preparation of test specimens for all
testing will be sampled by the Engineer on a random basis, in accordance
with the procedures contained in ASTM D 3665. One set of laboratory
compacted specimens will be prepared for each sublot in accordance with
ASTM D 6926, at the number of blows required by paragraph 403‑3.2,
Table 1. Each set of laboratory compacted specimens will consist of
three test portions prepared from the same sample increment. The sample
of bituminous mixture may be put in a covered metal tin and placed in an
oven for not less than 30 minutes or more than 60 minutes to stabilize
to compaction temperature. The compaction temperature of the specimens
shall be as specified in the job mix formula.

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> **Engineer should increase hold times to not less than 60 minutes and
> not more than 90 minutes when absorptive aggregates are used,**

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**(b)** The bulk specific gravity of each test specimen shall be
measured by the Engineer in accordance with ASTM D 2726 using the
procedure for laboratory-prepared thoroughly dry specimens, or ASTM D
1188, whichever is applicable, for use in computing pavement density.

**(c)** The bulk specific gravity used to determine the joint density at
joints formed between different lots shall be the lowest of the bulk
specific gravity values from the two different lots.

**(5) Acceptance.** Acceptance of field placed material for mat and
joint density will be determined by the Engineer in accordance with the
requirements of paragraph 403-5.2b.

**d. Partial Lots --- Field Placed Material.** When operational
conditions cause a lot to be terminated before the specified number of
tests have been made for the lot, or when the Contractor and Engineer
agree in writing to allow overages or other minor tonnage placements to
be considered as partial lots, the following procedure will be used to
adjust the lot size and the number of tests for the lot.

The last batch produced where production is halted will be sampled, and
its properties shall be considered as representative of the particular
sublot from which it was taken. In addition, an agreed to minor
placement will be sampled, and its properties shall be considered as
representative of the particular sublot from which it was taken. Where
three sublots are produced, they shall constitute a lot. Where one or
two sublots are produced, they shall be incorporated into the next lot,
and the total number of sublots shall be used in the acceptance plan
calculation, i.e., n = 5 or n = 6, for example. Partial lots at the end
of asphalt production on the project shall be included with the previous
lot.

**403‑5.2 ACCEPTANCE CRITERIA.**

**a. General.** Acceptance will be based on the following
characteristics of the bituminous mixture and completed pavement and
test results:

**(1)** Mat density

**(2)** Joint density

**(3)** Thickness

**(4)** Smoothness

**(5)** Grade

Mat density will be evaluated for acceptance in accordance with
paragraph 403-5.2b(1). Joint density will be evaluated for acceptance in
accordance with paragraph 403-5.2b(2).

Thickness will be evaluated by the Engineer for compliance in accordance
with paragraph 403-5.2b(3). Acceptance for smoothness will be based on
the criteria contained in paragraph 403-5.2b(4). Acceptance for grade
will be based on the criteria contained in paragraph 403-5.2b(5).

The Engineer may at any time, notwithstanding previous plant acceptance,
reject and require the Contractor to dispose of any batch of bituminous
mixture which is rendered unfit for use due to contamination,
segregation, incomplete coating of aggregate, or improper mix
temperature. Such rejection may be based on only visual inspection or
temperature measurements. In the event of such rejection, the Contractor
may take a representative sample of the rejected material in the
presence of the Engineer, and if it can be demonstrated in the
laboratory, in the presence of the Engineer, that such material was
erroneously rejected, payment will be made for the material at the
contract unit price.

**b. Acceptance Criteria.**

**(1) Mat Density.** Acceptance of each lot of plant produced material
for mat density shall be based on the average of all of the densities
taken from the sublots. If the average mat density of the lot so
established equals or exceeds 96 percent, the lot shall be acceptable.
If the average mat density of the lot is below 96 percent, the lot shall
be removed and replaced at the Contractor's expense.

**(2) Joint Density.** Acceptance of each lot of plant produced material
for joint density shall be based on the average of all of the joint
densities taken from the sublots. If the average joint density of the
lot so established equals or exceeds 94 percent, the lot shall be
acceptable. If the average joint density of the lot is less than 94
percent, the Contractor shall stop production and evaluate the method of
compacting joints. Production may resume once the reason for poor
compaction has been determined and appropriate measures have been taken
to ensure proper compaction.

**(3) Thickness.** Thickness of each course shall be evaluated by the
Engineer for compliance to the requirements shown on the plans.
Measurements of thickness shall be made by the Engineer using the cores
extracted for each sublot for density measurement. The maximum allowable
deficiency at any point shall not be more than ¼ inch less than the
thickness indicated for the lift. Average thickness of lift, or combined
lifts, shall not be less than the indicated thickness. Where thickness
deficiency exceeds the specified tolerances, the lot or sublot shall be
corrected by the Contractor at his expense by removing the deficient
area and replacing with new pavement. The Contractor, at his expense,
may take additional cores as approved by the Engineer to circumscribe
the deficient area.

**(4) Smoothness.** The final surface shall be free from roller marks.
The finished surfaces of each course of the pavement, except the
finished surface of the final surface course, shall not vary more than ⅜
inch when evaluated with a 16 foot straightedge. The finished surface of
the final surface course shall not vary more than ¼ inch when evaluated
with a 16 foot straightedge. The lot size shall be \[ \] square yards
(square meters). Smoothness measurements shall be made at 50 foot
intervals and as determined by the Engineer. In the longitudinal
direction, a smoothness reading shall be made at the center of each
paving lane. In the transverse direction, smoothness readings shall be
made continuously across the full width of the pavement. However,
transverse smoothness readings shall not be made across designed grade
changes. At warped transition areas, straightedge position shall be
adjusted to measure surface smoothness and not design grade transitions.
When more than 15 percent of all measurements within a lot exceed the
specified tolerance, the Contractor shall remove the deficient area to
the depth of the course of pavement and replace with new material. Skin
patching shall not be permitted. Isolated high points may be ground off
providing the course thickness complies with the thickness specified on
the plans. High point grinding will be limited to 15 square yards. Areas
in excess of 15 square yards will require removal and replacement of the
course in accordance with the limitations noted above.

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> **The Engineer shall specify the lot size. A minimum of 2,000 square
> yards (1 650 square meters) is recommended.**

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**(5) Grade.** The finished surface of the pavement shall not vary from
the gradeline elevations and cross sections shown on the plans by more
than ½ inch (12.70 mm). The finished grade of each lot will be
determined by running levels at intervals of 50 feet (15.2 m) or less
longitudinally and all breaks in grade transversely (not to exceed 50
feet) to determine the elevation of the completed pavement. The
Contractor shall pay the cost of surveying of the level runs that shall
be performed by a licensed surveyor. The documentation, stamped and
signed by a licensed surveyor, shall be provided by the Contractor to
the Engineer. The lot size shall be \[ \] square yards (square meters).
When more than 15 percent of all the measurements within a lot are
outside the specified tolerance, or if any one shot within the lot
deviates ¾ inch or more from planned grade, the Contractor shall remove
the deficient area to the depth of the final course of pavement and
replace with new material. Skin patching shall not be permitted.
Isolated high points may be ground off providing the course thickness
complies with the thickness specified on the plans. High point grinding
will be limited to 15 square yards. The surface of the ground pavement
shall have a texture consisting of grooves between 0.090 and 0.130
inches wide. The peaks and ridges shall be approximately 1/32 inch
higher than the bottom of the grooves. The pavement shall be left in a
clean condition. The removal of all of the slurry resulting form the
grinding operation shall be continuous. The grinding operation should be
controlled so the residue from the operation does not flow across other
lanes of pavement. Areas in excess of 15 square yards will require
removal and replacement of the pavement in accordance with the
limitations noted above.

**c. Density Outliers.** If the tests within a lot include a very large
or a very small value that appears to be outside the normal limits of
variation, check for an outlier in accordance with ASTM E 178, at a
significance level of 5 percent, to determine if this value should be
discarded.

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> **A minimum of 2,000 square yards (1,650 square meters) is
> recommended.**

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**403‑5.3 RESAMPLING PAVEMENT FOR MAT DENSITY.**

**a. General.** Resampling of a lot of pavement will only be allowed for
mat density and then, only if the Contractor requests same in writing,
within 48 hours after receiving the written test results from the
Engineer. A retest will consist of all the sampling and testing
procedures contained in paragraphs 403‑5.1b(1). Only one resampling per
lot will be permitted.

**(1)** A redefined mat density shall be calculated for the resampled
lot. The number of tests used to calculate the redefined mat density
shall include the initial tests made for that lot plus the retests.

**(2)** The cost for resampling and retesting shall be borne by the
Contractor.

**b. Payment for Resampled Lots.** The redefined mat density for a
resampled lot shall be used to evaluate the acceptance of that lot in
accordance with Paragraph 403-5.2.

**\[403‑5.4 LEVELING COURSE.** Any course used for truing and leveling
shall meet the requirements of paragraph 403‑3.2, but shall not be
subject to the density requirements of paragraph 403-5.1. The leveling
course shall be compacted with the same effort used to achieve density
of the test section. The truing and leveling course shall not exceed a
nominal thickness of 1‑½ inches (37.5 mm). The leveling course is the
first variable thickness lift of an overlay placed prior to subsequent
courses.**\]**

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> **Use this paragraph only when there is a need to restore proper
> cross‑section prior to overlaying. Areas of the pavement requiring a
> leveling course shall be shown on the plans.**

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Contractor QUALITY CONTROL

**403‑6.1 GENERAL.** The Contractor shall perform quality control
sampling, testing, and inspection during all phases of the work and
shall perform them at a rate sufficient to ensure that the work conforms
to the contract requirements, and at minimum test frequencies required
by paragraph 403-6.3, including but not limited to:

**a.** Mix Design

**b.** Aggregate Grading

**c.** Quality of Materials

**d.** Stockpile Management

**e.** Proportioning

**f.** Mixing and Transportation

**g.** Placing and Finishing

**h.** Joints

**i.** Compaction

**j.** Surface smoothness

**403‑6.2 TESTING LABORATORY.** The Contractor shall provide a fully
equipped asphalt laboratory meeting the requirements of paragraph
403-3.5 and 403-4.2a(2) located at the plant or job site. The Contractor
shall provide the Engineer with certification stating that all of the
testing equipment to be used is properly calibrated and will meet the
specifications applicable for the specified test procedures.

**403‑6.3 QUALITY CONTROL TESTING.** The Contractor shall perform all
quality control tests necessary to control the production and
construction processes applicable to these specifications and as set
forth in the approved Quality Control Program. The testing program shall
include, but not necessarily be limited to, tests for the control of
asphalt content, aggregate gradation, temperatures, aggregate moisture,
field compaction, and surface smoothness.

**a. Asphalt Content.** A minimum of two tests shall be performed per
lot in accordance with ASTM D 2172 for determination of asphalt content.
The weight of ash portion of the test, as described in ASTM D 2172,
shall be determined as part of the first test performed at the beginning
of plant production; and as part of every tenth test performed
thereafter, for the duration of plant production. The last weight of ash
value obtained shall be used in the calculation of the asphalt content
for the mixture. The asphalt content for the lot will be determined by
averaging the test results.

The use of the nuclear method for determining asphalt content in
accordance with ASTM D 4125 is permitted, provided that it is calibrated
for the specific mix being used.

**b. Gradation.** Aggregate gradations shall be determined a minimum of
twice per lot from mechanical analysis of extracted aggregate in
accordance with ASTM D 5444 and ASTM C 136 (Dry Sieve). When asphalt
content is determined by the nuclear method, aggregate gradation shall
be determined from hot bin samples on batch plants, or from the cold
feed on drum mix or continuous mix plants, and tested in accordance with
ASTM C 136 (dry sieve) using actual batch weights to determine the
combined aggregate gradation of the mixture.

**c. Moisture Content of Aggregate.** The moisture content of aggregate
used for production shall be determined a minimum of once per lot in
accordance with ASTM C 566.

**d. Moisture Content of Mixture.** The moisture content of the mixture
shall be determined once per lot in accordance with ASTM D 1461 **\[**or
AASHTO T110**\]**.

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> **ASTM D 1461 may be replaced with an AASHTO moisture content testing
> procedure using a conventional oven or microwave. The frequency can
> also change in the specification depending on the probability of
> incurring a moisture problem.**

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**e. Temperatures.** Temperatures shall be checked, at least four times
per lot, at necessary locations to determine the temperatures of the
dryer, the bitumen in the storage tank, the mixture at the plant, and
the mixture at the job site.

**f. In‑Place Density Monitoring.** The Contractor shall conduct any
necessary testing to ensure that the specified density is being
achieved. A nuclear gauge may be used to monitor the pavement density in
accordance with ASTM D 2950.

**g. Additional Testing.** Any additional testing that the Contractor
deems necessary to control the process may be performed at the
Contractor\'s option.

**h. Monitoring.** The Engineer reserves the right to monitor any or all
of the above testing.

**403‑6.4 SAMPLING.** When directed by the Engineer, the Contractor
shall sample and test any material that appears inconsistent with
similar material being sampled, unless such material is voluntarily
removed and replaced or deficiencies corrected by the Contractor. All
sampling shall be in accordance with standard procedures specified.

**403‑6.5 CONTROL CHARTS.** The Contractor shall maintain linear control
charts both for individual measurements and range (i.e., difference
between highest and lowest measurements) for aggregate gradation and
asphalt content.

Control charts shall be posted in a location satisfactory to the
Engineer and shall be kept current. As a minimum, the control charts
shall identify the project number, the contract item number, the test
number, each test parameter, the Action and Suspension Limits applicable
to each test parameter, and the Contractor\'s test results. The
Contractor shall use the control charts as part of a process control
system for identifying potential problems and assignable causes before
they occur. If the Contractor\'s projected data during production
indicates a problem and the Contractor is not taking satisfactory
corrective action, the Engineer may suspend production or acceptance of
the material.

**a. Individual Measurements.** Control charts for individual
measurements shall be established to maintain process control within
tolerance for aggregate gradation and asphalt content. The control
charts shall use the job mix formula target values as indicators of
central tendency for the following test parameters with associated
Action and Suspension Limits:

  --------------------------- --------------------- ---------------------
  **CONTROL CHART LIMITS FOR                        
  INDIVIDUAL MEASUREMENTS**                         

  Sieve                       Action Limit          Suspension Limit

  ¾ inch (19.0 mm)            0%                    0%

  ½ inch (12.5 mm)            +/‑6%                 +/‑9%

  ⅜ inch (9.5 mm)             +/‑6%                 +/‑9%

  No. 4 (4.75 mm)             +/‑6%                 +/‑9%

  No. 16 (1.18 mm)            +/‑5%                 +/‑7.5%

  No. 50 (0.30 mm)            +/‑3%                 +/‑4.5%

  No. 200 (0.075 mm)          +/‑2%                 +/‑3%

  Asphalt Content             +/‑0.45%              +/‑0.70%
  --------------------------- --------------------- ---------------------

**b. Range.** Control charts for range shall be established to control
process variability for the test parameters and Suspension Limits listed
below. The range shall be computed for each lot as the difference
between the two test results for each control parameter. The Suspension
Limits specified below are based on a sample size of n = 2. Should the
Contractor elect to perform more than two tests per lot, the Suspension
Limits shall be adjusted by multiplying the Suspension Limit by 1.18 for
n = 3 and by 1.27 for n = 4.

+-------------------------------------+--------------------------------+
| **CONTROL CHART LIMITS BASED ON     |                                |
| RANGE**                             |                                |
|                                     |                                |
| **(Based on n = 2)**                |                                |
+-------------------------------------+--------------------------------+
| Sieve                               | Suspension Limit               |
+-------------------------------------+--------------------------------+
| ½ inch (12.5 mm)                    | 11 percent                     |
+-------------------------------------+--------------------------------+
| ⅜ inch (9.5 mm)                     | 11 percent                     |
+-------------------------------------+--------------------------------+
| No. 4 (4.75 mm)                     | 11 percent                     |
+-------------------------------------+--------------------------------+
| No. 16 (1.18 mm)                    | 9 percent                      |
+-------------------------------------+--------------------------------+
| No. 50 (0.30 mm)                    | 6 percent                      |
+-------------------------------------+--------------------------------+
| No. 200 (0.075 mm)                  | 3.5 percent                    |
+-------------------------------------+--------------------------------+
| Asphalt Content                     | 0.8 percent                    |
+-------------------------------------+--------------------------------+

**c. Corrective Action.** The Contractor Quality Control Program shall
indicate that appropriate action shall be taken when the process is
believed to be out of tolerance. The Plan shall contain sets of rules to
gauge when a process is out of control and detail what action will be
taken to bring the process into control. As a minimum, a process shall
be deemed out of control and production stopped and corrective action
taken, if:

**(1)** One point falls outside the Suspension Limit line for individual
measurements or range; or

**(2)** Two points in a row fall outside the Action Limit line for
individual measurements.

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

> **The aggregate control chart parameters and Suspension and Action
> Limits contained in the above** **paragraphs are based on ¾ inch (19.0
> mm) maximum size aggregate gradation. When 1‑inch (25.0 mm) or 1‑¼
> inch (31.2 mm) maximum size aggregate greater than ¾\" is specified,
> the Individual Measurements Chart requirements should be amended as
> follows:**

  ----------------------------- ----------------- -----------------------
  **Sieve**                     **Action Limit**  **Suspension Limit**

  **1 inch or greater or 1‑½    **0%**            **0%**
  inch**                                          

  **¾ inch**                    **26%**           **11%**
  ----------------------------- ----------------- -----------------------

> **When ½‑inch (12.5 mm) maximum size aggregate is specified, the
> ¾-inch (19.0 mm) and 1‑inch (25.0 mm) sieves should be deleted from
> the Individual Measurements Chart and the ½‑inch (12.5 mm) sieve
> Action and Suspension Limits should be changed to 0%. For the ½‑inch
> (12.5 mm) gradation, the ½‑inch sieve should be deleted from the Range
> Chart.**

**\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \* \*
\* \* \* \* \* \* \* \* \* \* \* \* \* \***

**403-6.6 QUALITY CONTROL REPORTS.** The Contractor shall maintain
records and shall submit reports of quality control activities daily.

METHOD OF MEASUREMENT

**403‑7.1 MEASUREMENT.** Plant mix bituminous concrete pavement shall be
measured by the number of tons (kg) of bituminous mixture used in the
accepted work. Recorded batch weights or truck scale weights will be
used to determine the basis for the tonnage.

BASIS OF PAYMENT

**403‑8.1 PAYMENT.** Payment for an accepted lot of bituminous concrete
pavement shall be made at the contract unit price per ton (kg) for
bituminous mixture**.** The price shall be compensation for furnishing
all materials, for all preparation, mixing, and placing of these
materials, and for all labor, equipment, tools, and incidentals
necessary to complete the item.

Payment will be made under:

> Item P‑403‑8.1a Bituminous **\[ \] \[**Surface**\] \[**Base**\]
> \[**Binder**\] \[**Leveling**\]** Course

---per ton (kg)

TESTING REQUIREMENTS

> ASTM C 29 Bulk Density ("Unit Weight") and Voids in Aggregate
>
> ASTM C 88 Soundness of Aggregates by Use of Sodium Sulfate or
> Magnesium Sulfate
>
> ASTM C 117 Materials Finer than 75μm (No.200) Sieve in Mineral
> Aggregates by Washing
>
> ASTM C 127 Specific Gravity and Absorption of Coarse Aggregate
>
> ASTM C 131 Resistance to Degradation of Small Size Coarse Aggregate by
> Abrasion and Impact in the Los Angeles Machine
>
> ASTM C 136 Sieve Analysis of Fine and Coarse Aggregates
>
> ASTM C 183 Sampling and the Amount of Testing of Hydraulic Cement
>
> ASTM C 566 Total Evaporable Moisture Content of Aggregate by Drying
>
> ASTM D 75 Sampling Aggregates
>
> ASTM D 979 Sampling Bituminous Paving Mixtures
>
> ASTM D 995 Mixing Plants for Hot‑Mixed Hot‑Laid Bituminous Paving
> Mixtures
>
> ASTM D 1073 Fine Aggregate for Bituminous Paving Mixtures
>
> ASTM D 1074 Compressive Strength of Bituminous Mixtures
>
> ASTM D 1188 Bulk Specific Gravity and Density of Compacted Bituminous
> Mixtures Using Paraffin‑Coated Specimens
>
> ASTM D 1461 Moisture or Volatile Distillates in Bituminous Paving
> Mixtures
>
> ASTM D 2041 Theoretical Maximum Specific Gravity and Density of
> Bituminous Paving Mixtures
>
> ASTM D 2172 Quantitative Extraction of Bitumen from Bituminous Paving
> Mixtures
>
> ASTM D 2419 Sand Equivalent Value of Soils and Fine Aggregate
>
> ASTM D 2489 Estimating Degree of Particle Coating of
> Bituminous‑Aggregate Mixtures
>
> ASTM D 2726 Bulk Specific Gravity and Density of Non-Absorptive
> Compacted Bituminous Mixtures
>
> ASTM D 2950 Density of Bituminous Concrete in Place by Nuclear Methods
>
> ASTM D 3203 Percent Air Voids in Compacted Dense and Open Bituminous
> Paving Mixtures
>
> ASTM D 3665 Random Sampling of Construction Materials
>
> ASTM D 3666 Minimum Requirements for Agencies Testing and Inspecting
> Road and Paving Materials
>
> ASTM D 4125 Asphalt Content of Bituminous Mixtures by the Nuclear
> Method
>
> ASTM D 4318 Liquid Limit, Plastic Limit, and Plasticity Index of Soils
>
> ASTM D 4791 Flat Particles***,*** Elongated Particles***,*** or Flat
> and Elongated Particles in Coarse Aggregate
>
> ASTM D 4867 Effect of Moisture on Asphalt Concrete Paving Mixtures
>
> ASTM D 5444 Mechanical Size Analysis of Extracted Aggregate
>
> ASTM D 5581 Resistance to Plastic Flow of Bituminous Mixtures Using
> Marshall Apparatus (6\" Diameter Specimen)
>
> ASTM D 6926 Preparation of Bituminous Specimens Using MARSHALL
> Apparatus
>
> ASTM D 6927 MARSHALL Stability and Flow of Bituminous Mixtures
>
> ASTM E 11 Wire-Cloth Sieves for Testing Purposes
>
> ASTM E 178 Dealing with Outlying Observations
>
> AASHTO T 30 Mechanical Analysis of Extracted Aggregate
>
> **\[**AASHTO T 110 Moisture or Volatile Distillates in Bituminous
> Paving Mixtures**\]**

The Asphalt Institute\'s Mix Design Methods for Asphalt Concrete

Manual No. 2 (MS‑2)

MATERIAL REQUIREMENTS

> ASTM D 242 Mineral Filler for Bituminous Paving Mixtures
>
> ASTM D 946 Penetration Graded Asphalt Cement for Use in Pavement
> Construction
>
> ASTM D 3381 Viscosity‑Graded Asphalt Cement for Use in Pavement
> Construction
>
> ASTM D 4552 Classifying Hot‑Mix Recycling Agents
>
> AASHTO MP1 Performance Graded Binder Designation

**END OF ITEM P‑403**