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READ AND **REMOVE THIS PAGE** BEFORE PLACING

THE SPECIFICATION SECTION IN THE CONTRACT

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[DIVISION 17: SUPPLIES AND SERVICES]{.underline}

SECTION 17361 - AIRCRAFT PARKING RAMP MAINTENANCE

USE: Furnishing and applying a sealcoat on an existing aircraft ramp
bituminous wearing surface.

**NOTES TO SPECIFIER:**

A. Options within paragraphs are identified by enclosure in brackets;
blank spaces enclosed by brackets \[\_\_\_\_\_\] provide for information
to be inserted, as appropriate, to individual projects.

B. **TO AVOID CONFLICTING REQUIREMENTS AND COSTLY MISTAKES,** the
specifier must edit (delete, substitute or add to the text). The
remaining paragraphs must be renumbered.

C. DELETE FOR FINAL COPY: Notes to the Specifier, located between lines
of asterisks; all \[brackets\], [underlining]{.underline}, **boldface**,
and *italics*, within the paragraphs; and this page. (Open Reveal Codes
\[alt F3\] to do this accurately.)

D. [To Edit "(Footer B)":]{.underline} (Corel 8). **ENTIRE FOOTER SHOULD
BE BOLDED.** Click in the footer and delete the "Project Name (ftr B)"
text and replace it with the **Name of the Project (upper and lower
case)**. Replace date with current MM/YY (WITHOUT BRACKETS).

E. The Guide Specifications are intended to be continuously reviewed and
revised. User's technical comments are appreciated. Also, other related
or similar specification that are written "from scratch" that could
benefit others, or other questions can be sent to NSTC A/E Group, ST
110, or call (303) 987-6868.

**DRAWING DATA REQUIRED:**

**REQUIRED SPEC MODIFICATIONS:**

[GENERAL NOTES]{.underline}

A. Whenever entire articles, paragraphs, or subparagraphs are not
applicable, the articles, paragraphs, or subparagraphs should be
deleted; when necessary, reletter or renumber articles, paragraphs, or
subparagraphs.

B. THIS GUIDE IS NOT INTENDED AS A SUBSTITUTE FOR READING THE ENTIRE
SECTION.

[TECHNICAL NOTES]{.underline}

A. 1.1A: Select applicable words.

B. 1.1B: Select or add applicable specification sections. Do not list
specification sections from Division 17.

C. 1.2: Select or add applicable references.

D. 1.3A: Select applicable specification section.

E. 1.3B: Insert number of copies of Certificates of Conformance
required. Normally 3 copies are required. Distribution after review is
normally 1 copy to the COR, 1 copy to the Contractor, and 1 copy to the
project file.

F. 4.1 and 4.2: When a \"lump sum\" Contract is used, delete the title
PART 4: MEASUREMENT AND PAYMENT, and both articles from this section.
Measurement and payment will be addressed in Part 4 of Section 01009 or
Section 01010.

G. 4.1A: When not a \"lump sum\" Contract, select applicable phrases:
use the \"no measurement\" phrase when none of the Pay Items in this
sections are included in the Bid Schedule.

H. 4.2A: When not a \"lump sum\" Contract, select applicable phrases;
use the \"no direct payment\" phrase when none of the Pay Items in this
section are included in the Bid Schedule.

I. 4.2A: When not a \"lump sum\" Contract and payment is to be made
under this section, select applicable Pay Items. Do not change Pay Item
number. When Government-furnished property is specified for Pay Items,
the letter suffix GF will be added after the parenthesis of the item
number.

**REVISIONS OF THIS SECTION:**

CSI format, editorial changes: 12/01

Metric:

Technical Update: 02/90

SECTION 17361

AIRCRAFT PARKING RAMP MAINTENANCE

[PART 1: GENERAL]{.underline}

1.1 SUMMARY:

A. Section Includes: \[Sealing cracks\] \[and\] applying a coal-tar
pitch emulsion sealcoat, (including a siliconed latex rubber additive)
\[with\] \[and\] \[without\] mineral aggregate, on an existing
bituminous wearing surface.

1.2 REFERENCES:

A. American Association of State Highway and Transportation Officials:

AASHTO M 52-81 Tar for Use in Road Construction (R 1986)

AASHTO T 27-84 Sieve Analysis of Fine and Coarse Aggregates

AASHTO T 182-84 Coating and Stripping of Bitumen-Aggregate Mixtures

B. Federal Specifications:

Fed. Spec. R-P-355E Pitch, Coal Tar Emulsion (Coating for Bituminous
Pavements)

Fed. Spec. SS-S-1401C Sealant, Joint, Non-Jet-Fuel-Resistant, Hot
Applied, for Portland Cement and Asphalt Concrete Pavements

1.3 SUBMITTALS:

A. General: Submittals shall be according to \[Section 01009 - General
Information and Requirements.\] \[Section 01300 - Submittals.\]
\[Section 01365 - Certificates of Conformance.\]

B. Certificates of Conformance: Submit \[\_\_\_\_\] copies of written
certification from the manufacturer of the Contractor-furnished coal-tar
pitch emulsion and rubber additive, for each consignment of the emulsion
shipped to be used on this project that they conform to the requirements
of this specification section, with the exception that the volatile
material shall not exceed 50% and the non-volatile be 50 percent.

[PART 2: PRODUCTS]{.underline}

2.1 MATERIALS:

A. Crack Sealer: Shall be hot-poured, conforming to Fed. Spec. SS-S-1401
and shall set to a tack free condition within 24 hours.

B. Rubberized Coal Tar Pitch Emulsion Sand Slurry Protective Coating:
Shall be a basic coal tar pitch emulsion containing not more than 50%
water and not less than 50% non-volatile material content and conform to
Fed. Spec. R-P 355. In addition, the following additives shall be used:
Rubber as will provide a thixotropic composition as a copolymer being
present as a percent of the coal tar pitch emulation and having an
average particle size between 2000 and 4000 angstroms, said latex
copolymer containing 20 to 30 parts acrylic nonomer and 70 to 80 parts
of vinyl acetate with silicones as 3% of rubber content, and No. 3 sand
blasting sand generally passing U.S. sieve 20 and retained on U.S. sieve
30, 16 pounds per gallon, or 80 percent by volume of the coal tar pitch
emulsion, water as needed for application consistency (not exceeding
equal parts of coal tar pitch emulsion and water), to assure uniform
sand coverage on each coat. This composition shall be used for the first
two coats. The third coat shall consist of the same materials except
that no sand shall be present and the latex additive reduced
proportionately.

C. Bituminous Material: Shall be a coal tar pitch emulsion prepared from
a high temperature coal tar pitch conforming to the requirements of
AASHTO M-52. Oil and water gas tars shall not be used. The coal tar
pitch emulsion shall conform to Fed. Spec. R-P-355 with the exception
that the ash of Non-Volatile shall be 50% + and the water content shall
not exceed 50%.

D. Water: Shall be clear fresh potable water having a temperature of 50
degrees F or higher. The amount of water added to the coal tar pitch
emulsion shall not exceed 100%.

E. Mineral Aggregate: Shall be either a natural or a manufactured
angular product and shall be composed of clean, hard, durable, uncoated
particles, free from lumps of clay and all organic matter. The mineral
aggregate shall meet the gradation given in Table 1. The test for
gradation shall be made according to AASHTO T-27.

TABLE 1 - REQUIREMENTS FOR GRADATION OF AGGREGATE

Sieve Designation Percentage of Weight

(Square Openings) Passing Sieves

No. 16 . . . . . . . . . . . . . . . . . . . . . . . 100

No. 20 . . . . . . . . . . . . . . . . . . . . . .95-100

No. 30 . . . . . . . . . . . . . . . . . . . . . . 5-15

No. 40 . . . . . . . . . . . . . . . . . . . . . . 2-5

No. 100. . . . . . . . . . . . . . . . . . . . . . 0-2

2.2 EQUIPMENT:

A. Crack Sealing:

1\. Sealing Equipment: The melting kettle used to melt the crack sealing
compound shall be a double boiler, indirect fired type. The space
between the inner and outer shells shall be filled with a suitable heat
transfer oil or substitute having a flash point of not less than 600
degrees F. (315 degrees C). The kettle shall be equipped with a
satisfactory means of agitating the crack sealer at all times. This may
be accomplished by continuous stirring with mechanically operated
paddles and/or by a continuous circulating gear pump attached to the
heating unit. The kettle shall be equipped with thermostatic control
calibrated between 200 and 550 degrees F (93 and 288 degrees C). A
pressure hose will be directly connected to the melting kettle in such a
manner as to permit pumping the melted sealer throughout the hose to a
suitable applicator which will be direct and control the filling of
joints and cracks. The hose handle and applicator nozzle will be so
designed as to preclude the necessity of using direct flame on any
portion to free sealer.

2\. Routing Machine: A self-powered machine operating a power driven
tool or bit specifically designed for this purpose. The bit shall rotate
about a designed for axis at sufficient speed to cut a smooth walled,
slightly tapered groove in the pavement surface on the meandering line
of the crack. The machine used to power the router shall be so designed
as to permit the router to follow the trace of the crack without
deviation.

B. Resurfacing:

1\. Spray Distributors: Shall be self-propelled, equipped with pneumatic
tires, and be capable of applying 0.10 to 0.50 gal/yd^2^ of tar emulsion
slurry over the required width of application. Distributors shall be
equipped with removable manhole covers, tachometers. pressure gauges,
and volume-measuring devices.

2\. Mixing or Agitating Equipment: Shall be tank-type power mixer.
Mixing in tanks may be done in horizontal, round-bottom tanks equipped
with a power driven full-sweep mixer of sufficient capacity to maintain
the mineral content of the emulsion in complete suspension.

3\. Pumping Equipment: Shall be available for pumping water and for
handling or applying the emulsion. When compressed-air spray equipment
is used for applications of the emulsion, heavy-duty air compressors
shall be furnished.

4\. Mixing Machines: Shall be a central plant mixer, a transit mixer, or
any type mixer approved by the Contracting Officer capable of producing
a uniform mixture of emulsion and aggregate.

a\. Transit Mixer or Other Type Mixer: When used for preparing the
slurry, the slurry may be applied with a spreader box into which the
slurry is conveyed by a chute. The spreader box shall consist of a
rectangular frame 10 feet or more in width and not less than 8 feet
long, equipped for towing, and with a squeegee screed across the inside
of the box about three-quarters toward the rear which is adjustable for
thickness of application and crown of pavement. The squeegee on the
spreader box may be neoprene rubber belting, 1/2 inch thick and 6 to 8
inches in width, held vertically across the width of the box (preferable
with 4 inches of \"free rubber\" for aggregate flexibility) and anchored
to an adjustable frame. The front and side of the box shall be lined
with 1/4 inch thick belting to prevent slurry leakage and to assure
proper spreading. The slurry box shall be equipped with wheels in order
that it may be raised off the pavement and quickly towed into position
for use on adjacent lanes.

b\. Spray-Type Applicator or Distributor: Shall be used for applying the
slurry when approved by the Contracting Officer. This equipment shall be
equipped with an agitator to keep the slurry uniformly mixed before and
during application and so designed to uniformly spread the slurry on the
pavement surface at the specified rates of application.

c\. Other Tools or Equipment: Brushes, hand squeegees, hose equipment,
aggregate batched, and sand spreaders, tank trucks, water distributors
and flushers, power sweepers, power blowers, barricades, shall be
provided as required.

2.3 MIXES:

A. Quantities And Composition of Materials Per Square Yard: The
approximate amounts and composition of materials per square yard for the
sealcoat shall be as provided in Table 2. The exact amounts to be used
shall be determined by the Contracting Officer.

TABLE 2 - QUANTITIES AND COMPOSITION OF MATERIALS

Gallons

of Coal Gallons Application

Tar Pitch Gallons Pounds of Rate/Gal.

Application Emulsion of Water of Sand Additives Square Yard

1st 100 45 800 5 0.20 - 0.30

2nd 100 45 800 5 0.20 - 0.30

3rd 100 30 -0- 3 0.15 - 0.20

[PART 3: EXECUTION]{.underline}

3.1 PREPARATION:

A. Crack Sealing: Cracks shall be routed to a depth of not less than 3/4
inch and not less than 1/2 inch in width. The cracks shall then be
cleaned by blowing with compressed air.

B. Resurfacing: Bituminous pavement surfaces which have been softened by
petroleum derivatives or have failed due to any other cause shall be
removed to the full depth of the damage and replaced with new bituminous
concrete coarser than that of the existing pavement. Areas of the
pavement surface to be treated shall be in a firm consolidated condition
and sufficiently cured so that there is no concentration of oils on the
surface. Areas that have been subjected to fuel or oil spillage shall be
wire brushed to remove any accumulations. The accumulations removed by
air blowing and the area primed with shellac or a synthetic resin which
will not allow the oil in the pavement to bleed through to prevent
disbonding of the protective coating. Prior to placing the sealcoat, the
surface of the pavement shall be clean and free from dust, dirt, or
other loose foreign matter, grease, oil, or any type of objectionable
surface film. The existing surface shall be cleaned with a power blower
and wire brushes, when approved by the Contracting Officer. Where
vegetation exists in cracks, the vegetation shall be removed and the
cracks cleaned to a depth of two inches. These cracks shall be treated
with a concentrated solution of an approved herbicide.

3.2 APPLICATION:

A. Crack Sealing:

1\. Crack Filling: Cracks shall be sealed immediately following final
cleaning of the sides of the cracks. The sides of the cracks shall be
surface dry, and the atmospheric and pavement temperatures shall both be
above 40 degrees F at the time of installation of crack sealing
materials. Open cracks ready for sealing that cannot be sealed under the
conditions specified or when rain interrupts filling operations,shall be
blown out and allowed to dry prior to installing the crack sealing
materials. Crack sealer shall be heated and applied at the temperature
specified by the manufacturer. Cracks shall be filled with crack sealer
without formation of voids or entrapped air. More than one application
of crack sealer may be necessary to fill cracks to the required level.
Excess or spilled sealer shall be removed from the pavement and
discarded.

2\. Weather Limitation:. Crack repair materials shall not be applied in
wet cracks or where frost, snow or ice is present nor when the ambient
temperature is below 40 degrees F (4 degrees C).

B. Resurfacing:

1\. Premixing: When the emulsion and aggregate are blended, the material
shall be premixed to produce a slurry seal coat. The quantities of
materials to be combined in each batch shall be according to the
proportions shown in Table 2.

2\. Mixing: Before application, the materials shall be proportioned
accurately and mixed by approved mixing equipment. The emulsion and the
water are first charged into the mixer and blended to the desired
consistency. Aggregate shall be added at a slow and uniform rate while
the mixing is continued, mineral aggregate and the latex rubber additive
shall then be added. After all the constituents are in the mixer, the
mixing shall continue for approximately five minutes longer. The mixing
shall produce a smooth, free flowing, homogeneous mixture of uniform
consistency. Slow mixing shall be continuous from the time the bitumen
is placed into the mixer until the slurry is applied by distributor
truck or poured into the spreading equipment. During the entire mixing
process, no breaking, segregating, or hardening of the emulsion, nor
balling, lumping, or swelling of the aggregate shall be permitted. When
transit mixers are used, the drum shall be rotated at its lowest
possible speed. The emulsion shall be continuously circulated or
agitated from the time it has been mixed until its application on the
pavement surface. Spray bar nozzles, pumps, or other equipment can be
cleaned with coal-tar toluene or xylene.

3\. Application: After the pavement surface has been inspected, the
coating shall be applied over the pavement in three applications
according to the method described below. The emulsion shall be
thoroughly agitated before use and during use so that a homogeneous
consistency is assured for proper and uniform application. The slurry
shall be applied at a uniform rate to provide the desired amount. Care
shall be taken not to overload the box with slurry but a sufficient
quantity shall be maintained to supply a feed against the full width of
the squeegee. During the application, surfaces of adjacent structures
shall be protected to prevent them from being spattered or marred.

a\. Hand Method: The emulsion shall be applied in two or three coats in
the amounts per square yard as stated in Table 2. The material shall be
poured in rows on the pavement and spread with a squeegee or brush. This
procedure shall be continued until the entire area is covered. The first
coat shall be allowed to dry and cure sufficiently to prevent pickup
before the second coat is applied.

b\. Distributor or Applicator: When applied by distributor or approved
applicator, the emulsion shall be applied uniformly to the surface of
the pavement at the prescribed pressures and in the amounts per square
yard as specified in Table 2. The first application shall be cured
sufficiently to drive over without damage before the second application
is applied. In areas inaccessible to the distributor application may be
by the hand method.

4\. Curing: The applied emulsion sealcoat shall be allowed to cure for
not less than four hours between coats and not less than forty-eight
hours after the 3rd coat, during which time all traffic shall be
excluded from the area that has been sealed.

5\. Weather Limitations: The tar emulsion seal coat shall not be applied
when the weather is foggy or when rain threatens, nor when the
atmospheric or pavement temperature is below 50 degrees F, unless
otherwise approved by the Contracting Officer.

3.3 FIELD QUALITY CONTROL:

A. Sampling and Testing: The Government will test all materials and bear
such costs; except, the Contractor will bear the costs of retesting when
required by initial failure of materials or work to meet specified
requirements. The Government will order all tests. The Contractor shall
cooperate with personnel gathering samples for tests.

[PART 4: MEASUREMENT AND PAYMENT]{.underline}

4.1 METHOD OF MEASUREMENT:

A. Units: \[The work described in this section will not be measured for
payment.\] \[Crack sealing will be measured and paid for \[on a lump sum
basis.\] \[by the linear foot of crack routed, cleaned, and sealed
measured along the ground surface of the crack sealed.\] \[Resurfacing
will be measured and paid for \[on a lump sum basis.\] \[by the square
yard.\] \[One measurement will be made to include all applications of
coal-tar pitch emulsion seal coat.\] \[Mineral Aggregate shall be
included in the per square yard measurement of quantities.\]

4.2 BASIS OF PAYMENT:

A. Payment: \[No direct payment for the work described under this
section will be made. The Contractor shall include consideration for
this item in the bid price for other items of the Contract.\] \[Prices
and payment will be full compensation for the work described in this
section. Payment will be made under:\]

[Pay Item Pay Unit]{.underline}

17361(1) Crack Sealing. . . . . . . . . . . . . . . Lump Sum

17361(2) Crack Sealing. . . . . . . . . . . . . . . Linear Foot

17361(11) Resurfacing (Coal-Tar Pitch Emulsion) . . Lump Sum

17361(12) Resurfacing (Coal-Tar Pitch Emulsion) . . Square Yard

END OF SECTION