**CONSTRUCTION STANDARD SPECIFICATION**

**SECTION 02232**

**[AGGREGATE BASE COURSE (ABC)]{.underline}**

**[RECYCLED ASPHALT BASE COURSE (RABC)]{.underline}**

**[CRUSHED CONCRETE BASE COURSE (CCBC)]{.underline}**

Page

PART 1 -- GENERAL

1.01 Summary [2](#summary)

1.02 References [2](#references)

1.03 Definitions [3](#definitions)

1.04 Submittals [4](#submittals)

1.05 Delivery, Storage And Handling [4](#delivery-storage-and-handling)

1.06 Project Conditions [4](#project-conditions)

PART 2 - PRODUCTS

2.01 Manufacturers [5](#manufacturers)

2.02 Materials [5](#materials)

2.03 Mixes [6](#mixes)

2.04 Source Quality Control [7](#source-quality-control)

PART 3 - EXECUTION

3.01 Preparation [7](#preparation)

3.02 Installation [8](#installation)

3.03 Field Quality Control [8](#field-quality-control)

3.04 Cleaning [9](#cleaning)

**CONSTRUCTION STANDARD SPECIFICATION**

**SECTION 02232**

**[AGGREGATE BASE COURSE (ABC)]{.underline}**

**[RECYCLED ASPHALT BASE COURSE (RABC)]{.underline}**

**[CRUSHED CONCRETE BASE COURSE (CCBC)]{.underline}**

# PART 1 -- GENERAL

## 1.01 SUMMARY

A. Section Includes: Work provided under this specification shall
include the furnishing, placement and compaction of either aggregate
base course (ABC), recycled asphalt base course (RABC), or crushed
concrete base course (CCBC).

Job mix formulae and gradations shall meet the criteria as set forth in
the most current City of Albuquerque approved base course mix designs.

B. Products Installed but not Furnished Under this Section:

1\. Prime coat for surface sealing of compacted aggregate base course.

2\. Prepared subgrade for a compacted soil foundation prior to placing
an aggregate base course in preparation for an asphalt pavement.

C. Related Sections: Refer to the following sections for related work:

1\. Section 02200, \"Earthwork\"

2.  Section 02510, \"Asphalt Concrete Pavement\"

## 1.02 REFERENCES

A. American Society for Testing and Materials (ASTM)

C88 Test Method for Soundness of Aggregates by Use of Sodium Sulfate or
Magnesium Sulfate

C131 Test Method for Resistance to Degradation of Small-Size Coarse
Aggregate by Abrasion and Impact in the Los Angeles Machine

C136 Method for Sieve Analysis of Fine and Coarse Aggregates

D75 Practice for Sampling Aggregates

D422 Test Method for Particle-Size Analysis of Soils

D1557 Test Methods for Moisture-Density Relations of Soils and
Soil-Aggregate Mixtures Using 10-lb(4.54-kg) Rammer and 18-in.(457mm)
Drop

D2419 Test for Sand Equivalent Value of Soils and Fine Aggregate

D2844 Test Methods for Resistance R-Value and Expansion Pressure of
Compacted Soils

D2922 Test Methods for Density of Soil and Soil-Aggregate in Place by
Nuclear Methods (Shallow Depth)

D2940 Specification for Graded Aggregate Material for Bases or Subbases
for Highways or Airports

D3017 Test Method for Water Content of Soil and Rock in-place by Nuclear
Methods (Shallow Depth)

D4318 Test Methods for Liquid Limit, Plastic Limit, and Plasticity Index
of Soils

B. City of Albuquerque "Standard Specifications For Public Works
Construction"

Section 302 Aggregate Base Course Construction

## 1.03 DEFINITIONS

A. Emulsified Asphalt: A paving asphalt uniformly suspended with water.
The emulsion permits the application of paving grade asphalts at normal
atmospheric temperatures to obtain workable fluidity. In the emulsifying
process, warm asphalt is mechanically milled into minute droplets or
globules and dispersed in water, treated with a small quantity of
emulsifying agent, usually some type of soap. By proper selection of an
emulsifying agent, emulsified asphalts are produced in several types and
grades. By choice of emulsifying agent, the emulsified asphalt may be:

1\. Anionic - asphalt globules are electro-negatively charged.

2\. Cationic - asphalt globules are electro-positively charged.

B. Prime Coat: An application of emulsified asphalt to an untreated
granular base in preparation for a subsequent asphalt course. The prime
coat is designed to waterproof the base surface, and provide adhesion
between the base and the next course.

C. Base Course: Placed on prepared surfaces to distribute wheel loads,
provide a non-frost susceptible material on which to support surface
courses.

## 1.04 SUBMITTALS

A. General: Submit the following in accordance with Conditions of
Contract and Section 01330, "Submittal Procedures".

B. Product Data: Submit product data for each base course material and
prime coat used, including supplier and design mix identification
number.

C. Certification of Compliance: Provide certification that mix design
complies with the requirements specified in 2.03 "Mixes" of this
specification.

D. Test Reports: Provide laboratory test reports to show that materials
comply with requirements specified in 2.02 "Materials" of this
specification.

## 1.05 DELIVERY, STORAGE AND HANDLING

A. Delivery: Contractor shall provide to the Sandia Delegated
Representative (SDR) with each load of batched material and/or material
delivered to the job site, before unloading at the site, a copy of the
delivery ticket on which is printed, stamped or written, the information
defined in TABLE 02232.A.

+----------+-----------------------------------------------------------+
| DELIVERY |                                                           |
| TICKET   |                                                           |
| INF      |                                                           |
| ORMATION |                                                           |
|          |                                                           |
| **TABLE  |                                                           |
| 0        |                                                           |
| 2232.A** |                                                           |
+----------+-----------------------------------------------------------+
| A.       | Name of Supplier                                          |
+----------+-----------------------------------------------------------+
| B.       | Date of Delivery                                          |
+----------+-----------------------------------------------------------+
| C.       | Delivery Ticket Number                                    |
+----------+-----------------------------------------------------------+
| D.       | Name of Contractor                                        |
+----------+-----------------------------------------------------------+
| E.       | Project Name (optional)                                   |
+----------+-----------------------------------------------------------+
| F.       | Job Mix Formula Identification Number                     |
+----------+-----------------------------------------------------------+
| G.       | Weight of Load                                            |
+----------+-----------------------------------------------------------+
| H.       | Time Loaded                                               |
+----------+-----------------------------------------------------------+

B. Protection: Base course shall be transported in suitable vehicles
with a cover. A load shall be covered immediately after loading and
remain covered until unloading.

## 1.06 PROJECT CONDITIONS

Environmental Requirement: In the event of temporary suspension of the
Work or inclement weather, or as directed by the SDR, all of the Work,
materials and equipment incorporated therein shall be protected against
damage, injury or loss from the weather, whether in storage on or off
the site.

# PART 2 - PRODUCTS

## 2.01 MANUFACTURERS

Subject to compliance with requirements, manufacturers of products
include, but are not limited to, the following:

Western Mobile, Inc.

Calmat Co. of New Mexico

## 2.02 MATERIALS

A. General: Provide base course material consisting of fine and coarse
aggregate, the combination of materials conforming to the requirements
of ASTM D2940.

Base course shall have a resistance value (R-value) not less than 76 as
determined by ASTM D2844.

B. Coarse Aggregate: Durable crushed particles of either stone, gravel,
asphalt concrete pavement, or portland cement concrete.

1\. Aggregates retained on the No. 4 (4.75 mm) sieve shall be capable of
withstanding the effects of handling, spreading, and compacting without
degradation production or deleterious fines.

2\. Coarse aggregates shall comply with the requirements shown in TABLE
02232.B.

C. Fine Aggregate: Aggregates retained on the No. 4 (4.75 mm) sieve
shall consist of fines from the operation of crushing course aggregate.

1\. Natural sand, or finer mineral matter, or both, may be added where
available and suitable.

2\. Fine aggregate shall comply with the requirements shown in TABLE
02232.B.

D. Prime Coat: Prime coat for surface sealing of compacted base course
shall comply with the requirements of Section 02510, "Asphalt Concrete
Pavement".

  --------------------------------------- --------------- ----------------
  **ENGINEERING REQUIREMENTS TABLE                        
  02232.B**                                               

  CHARACTERISTIC                          Fine            Course

  Los Angeles Abrasion Wear (ASTM C131)                   40% max.

  Soundness (5 cycles ASTM C88)           15% max.        15% max.

  Crushed Aggregate (% Material Retained                  50% max.
  on 3/8 inch sieve (9.5 mm) by wt.,                      
  having at least two (2) fractured                       
  faces)                                                  

  Maximum % passing No. 200 (75 μm)       60% of No. 30   
                                          (600 μm)        

  Plasticity Index (Material finer than   4.0 max.        
  No. 40 sieve) (425 μm)                                  

  Sand Equivalent Value                   35 min.         
  --------------------------------------- --------------- ----------------

## 2.03 MIXES

A. Job mix formula gradation shall comply with the requirements for
gradation ranges and tolerances shown in TABLE 02232.C.

B. Job mix formulas required in this specification are the same as those
required by the City of Albuquerque\'s Public Works Department. Job mix
formulas pre-approved by the City of Albuquerque Materials Engineer are
on file with the manufacturers listed in 2.01 "Manufacturers" and shall
comply with the latest edition of the City of Albuquerque Standard
Specification for Public Works Construction, Section 3.02 - "Aggregate
Base Course Construction."

+------------+--------------------+----------------+-----------------+
| *          |                    |                |                 |
| *GRADATION |                    |                |                 |
| RANGES AND |                    |                |                 |
| TO         |                    |                |                 |
| LERANCES** |                    |                |                 |
|            |                    |                |                 |
| **TABLE    |                    |                |                 |
| 02232.C**  |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| Sieve      | Production         | Percent        | Production      |
|            |                    | Passing        |                 |
| Size/Type  | Range              |                | Tolerances      |
|            |                    |                | (+/-%)          |
+------------+--------------------+----------------+-----------------+
| 1-1/2 inch | 100                | 100            |                 |
| (38.1 mm)  |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| 1 inch     | 95 - 100           | 100            |                 |
|            |                    |                |                 |
| (25.4 mm)  |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| 3/4 inch   |                    | 90 - 100       | 8               |
| (19.1 mm)  |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| 1/2 inch   | 65 - 75            |                | 8               |
|            |                    |                |                 |
| (12.7 mm)  |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| 3/8 inch   |                    | 65 - 80        | 8               |
|            |                    |                |                 |
| (9.5 mm)   |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| No. 4      | 34 - 46            | 48 - 55        | 8               |
| (4.75 mm)  |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| No. 30     | 12 - 18            | 18 - 25        | 5               |
| (600 μm)   |                    |                |                 |
+------------+--------------------+----------------+-----------------+
| No. 200    | 5 - 12             | 6 - 15         | 3               |
| (600 μm)   |                    |                |                 |
+------------+--------------------+----------------+-----------------+

## 2.04 SOURCE QUALITY CONTROL

A. Tests: A sample of material delivered to the project shall be taken
for each 300 tons (270 metric tons) placed or each day's placement,
whichever is greater, and tested for gradation and moisture density
relationship.

1\. Average value of individual gradation tests, for all sieve size
determinations, shall comply with the job mix formula within the
tolerances specified in TABLE 02232.C.

2.  Noncompliant material shall be resampled and retested for
    compliance. Material not in compliance after the initial and
    follow-up testing shall be removed and replaced by the Contractor at
    no cost to the SNL.

# PART 3 - EXECUTION

## 3.01 PREPARATION

Immediately upon completion of compaction, Contractor shall seal the
surface of the compacted base course with a prime coat according to the
requirements of Section 02510, "Asphalt Concrete Pavement."

A. Prime coat shall be applied as required to provide a uniform coverage
of the surface.

B. If final surfacing is to be placed within twenty-four (24) hours
after completion of compaction, the prime coat may be waived as
authorized by the SDR.

C. Traffic on compacted base course shall be limited to only final
surfacing traffic and vehicles applying moisture control, as authorized
by the SDR.

## 3.02 [INSTALLATION]{.underline}

A. General: Each base course shall be placed in lifts which will provide
not less than four (4) inches (102 mm) and not more than 6 inches (152
mm) compacted thickness. Work shall be to the lines, grades, dimensions,
moisture, density and typical sections as specified in contract
documents.

B. Spreading: Aggregate bases shall be delivered to the roadbed as
uniform mixtures and each layer shall be spread in one operation.

1\. Aggregate bases shall be delivered to the roadbed at a uniform
quantity without resorting to picking up, or otherwise shifting the
aggregate base material.

2\. Use of motor graders will be permitted during depositing, spreading
and compacting operations.

3\. Segregation of aggregates shall be avoided and the material as
spread shall be free from pockets of coarse or fine material.

C. Tolerances: Material shall be moisture conditioned within a range of
optimum moisture plus or minus two percent (+/-2%), and compacted to a
dry density greater than ninety-five (95) percent of maximum dry density
as determined in accordance under the procedures specified in ASTM
D1557. Such moisture shall be uniformly distributed throughout the
material.

D. Finished Surface: Finished surface of the compacted aggregate base
course shall not deviate from finished grade in excess of 1/2 inch (12.7
mm) in 10 feet (3 m) when tested with a 10-foot (3 m) straight edge in
any direction. All deviations in excess of the specified shall be
corrected by the Contractor prior to authorization for placement of the
next lift of material.

## 3.03 FIELD QUALITY CONTROL

A. Field testing of only locally processed or produced material directly
incorporated into the Work, including but not limited to the
establishment of density curves representative of materials to be used
in the compliance test, will be paid by SNL.

In the event the initial testing shows defective work, materials,
supplies or equipment, all subsequent testing shall be at Contractor\'s
sole expense. Contractor shall pay for such subsequent retesting
directly to the testing agency.

B. Tests: Compaction tests will be taken at the rate of one test for
each 500 SY (420 m2) per lift placed, or as directed by the SDR, in
accordance with the requirements of ASTM D2922 and D3017. Areas
represented by noncompliant tests shall be reworked and retested for
compliance by SNL.

Test reports will include but not be limited to the requirements of
TABLE 02232.D .

+-----------------------------------------------------------------------+
| **TEST REPORT INFORMATION**                                           |
|                                                                       |
| **TABLE 02232.D**                                                     |
+-----------------------------------------------------------------------+
| FIELD DATA                                                            |
+-----------------------------------------------------------------------+
| > Date of Sampling/Field Test                                         |
+-----------------------------------------------------------------------+
| > Project Number                                                      |
+-----------------------------------------------------------------------+
| > Project Title                                                       |
+-----------------------------------------------------------------------+
| > Location of sample/field test as defined by the project plans and   |
| > specifications                                                      |
+-----------------------------------------------------------------------+
| > Time of Sampling/Field Testing                                      |
+-----------------------------------------------------------------------+
| > Field test results with reference specification limits              |
+-----------------------------------------------------------------------+
| LABORATORY DATA                                                       |
+-----------------------------------------------------------------------+
| > Base Course Classification                                          |
+-----------------------------------------------------------------------+
| > Gradation                                                           |
+-----------------------------------------------------------------------+
| > Plasticity Index                                                    |
+-----------------------------------------------------------------------+
| > Liquid Limit                                                        |
+-----------------------------------------------------------------------+
| > Optimum moisture/maximum dry density relationship and graph         |
+-----------------------------------------------------------------------+
| > Estimated Soil Resistance R-Value                                   |
+-----------------------------------------------------------------------+

## 3.04 CLEANING

Contractor shall keep the premises free from accumulations of waste
materials, rubbish, and other debris resulting from the Work.

A. Remove all waste materials, rubbish, and debris from and about the
premises.

B. Remove all tools, construction equipment and machinery, and surplus
materials.

C. Contractor shall restore to their original condition those portions
of the site not designated for alteration by the Contract documents.

END OF SECTION