SECTION 02748 PAV 2008.doc

SECTION 02748

BITUMINOUS TACK AND PRIME COATS

1 GENERAL

1.1 REFERENCES

The publications listed below form a part of this specification to the extent referenced. The publications are referred to in the text by basic designation only.

AMERICAN ASSOCIATION OF STATE HIGHWAY AND TRANSPORTATION OFFICIALS (AASHTO)

AASHTO M 20

Penetration Graded Asphalt Cement

AASHTO M 81

Cut-Back Asphalt (Rapid-Curing Type)

AASHTO M 82

Cut-Back Asphalt (Medium-Curing Type)

AASHTO M 226

Viscosity Graded Asphalt Cement

AASHTO T 40

Sampling Bituminous Materials

AMERICAN SOCIETY OF TESTING AND MATERIALS (ASTM)

ASTM D 140

Sampling Bituminous Materials

ASTM D 946

Penetration-Graded Asphalt Cement for Use in Pavement Construction

ASTM D 977

Emulsified Asphalt

ASTM D 1250

Petroleum Measurement Tables

ASTM D 2026

Cutback Asphalt (Slow-Curing Type)

ASTM D 2027

Cutback Asphalt (Medium-Curing Type)

ASTM D 2028

Cutback Asphalt (Rapid-Curing Type)

ASTM D 2397

Cationic Emulsified Asphalt

ASTM D 2995

Determining Application Rate of Bituminous Distributors

ASTM D 3381

Viscosity-Graded Asphalt Cement for Use in Pavement Construction

NEW JERSEY STATE HIGHWAY DEPARTMENT (NJSHD)

Standard Specifications for

Road and Bridge Construction

1.2 UNIT PRICES

1.2.1 Payment

The quantities of bituminous material, determined as specified, will be not paid for separately. Application shall be accomplished in accordance with the requirements of other line items and payment shall constitute full compensation for all operations necessary to complete the work as specified herein.

1.2.2 Waybills and Delivery Tickets

Before the final statement is allowed, the Contractor shall file with the Contracting Officer certified waybills and certified delivery tickets for all bituminous materials used in the construction of the pavement covered by the contract. The Contractor shall not remove bituminous material from storage until the initial outage and temperature measurements have been taken. The delivery or storage units will not be released until the final outage has been taken.

1.3 SUBMITTALS

Government approval is required for submittals with a "GA" designation; submittals having an "FIO" designation are for information only. The following shall be submitted in accordance with Section 01330 SUBMITTAL PROCEDURES:

SD-09 Reports Tests; GA.

Copies of all test results for bituminous materials, within 24 hours of completion of tests. Certified copies of the manufacturer's test reports indicating compliance with applicable specified requirements, not less than 30 days before the material is required in the work.

SD-18 Records Waybills and Delivery Tickets; GA.

Waybills and delivery tickets, during progress of the work.

1.4 PLANT, EQUIPMENT, MACHINES AND TOOLS

1.4.1 General Requirements

Plant, equipment, machines and tools used in the work shall be subject to approval and shall be maintained in a satisfactory working condition at all times.

1.4.2 Bituminous Distributor

The distributor shall have pneumatic tires of such size and number to prevent rutting, shoving or otherwise damaging the base surface or other layers in the pavement structure. The distributor shall be designed and equipped to spray the bituminous material in a uniform coverage at the specified temperature, at readily determined and controlled rates with an allowable variation from the specified rate of not more than plus or minus 5 percent, and at variable widths. Distributor equipment shall include a separate power unit for the bitumen pump, full-circulation spray bars, tachometer, pressure gauges, volume-measuring devices, adequate heaters for heating of materials to the proper application temperature, a thermometer for reading the temperature of tank contents, and a hand hose attachment suitable for applying bituminous material manually to areas inaccessible to the distributor. The distributor shall be equipped to circulate and agitate the bituminous material during the heating process.

1.4.3 Power Brooms and Power Blowers

Power brooms and power blowers shall be suitable for cleaning the surfaces to which the bituminous coat is to be applied.

1.5 WEATHER LIMITATIONS

Bituminous coat shall be applied only when the surface to receive the bituminous coat is dry. Bituminous coat shall be applied only when the atmospheric temperature in the shade is 50 degrees For above and when the temperature has not been below 35 degrees F for the 12 hours prior to application.

2 PRODUCTS

2.1 TACK COAT

Cutback asphalt and Emulsified asphalt shall conform to ASTM D 977, ASTM D 2026, ASTM D 2027, ASTM D 2028, ASTM D 2397 or AASHTO M 81, AASHTO M 82, and the requirements of the NJSHD Specifications.

3 EXECUTION

3.1 PREPARATION OF SURFACE

Immediately before applying the bituminous coat, all loose material, dirt, clay, or other objectionable material shall be removed from the surface to be treated. The surface shall be dry and clean at the time of treatment.

3.2 APPLICATION RATE

The exact quantities within the range specified, which may be varied to suit field conditions, shall be in accordance with the New Jersey State Highway Specifications, Sections 400-27 & 400-28, or as determined by the Contracting Officer's Representative.

3.2.1 Tack Coat

Bituminous material for the tack coat shall be applied in quantities specified in New Jersey State Highway Specifications, Sections 400-27 & 400-28, or as determined by the Contracting Officer's Representative.

3.2.2 Prime Coat

Bituminous material for the prime coat shall be applied in quantities New Jersey State Highway Specifications, Sections 400-27 & 400-28, or as determined by the Contracting Officer's Representative.

3.3 APPLICATION TEMPERATURE

3.3.1 Viscosity Relationship

Asphalt application temperature shall provide an application viscosity between 10 and 60 seconds, Saybolt Furol, or between 20 and 120 centistokes, kinematic. The temperature viscosity relation shall be furnished to the Contracting Officer.

3.3.2 Temperature Ranges

The viscosity requirements shall determine the application temperature to be used. The following is a normal range of application temperatures:

Liquid Asphalt

SC-70 120-225 degrees F

SC-250 165-270 degrees F

MC-30 85-190 degrees F

MC-70 120-225 degrees F

MC-250 165-270 degrees F

RC-70 120-200 degrees F*

RC-250 165-250 degrees F*

Paving Grade Asphalt

Penetration Grades

200-300 plus 265 degrees F

120-150 plus 270 degrees F

85-100 plus 280 degrees F

Viscosity Grades

AC 2.5 plus 270 degrees F

AC 5 plus 280 degrees F

AC 10 plus 280 degrees F

AR 1000 plus 275 degrees F

AR 2000 plus 285 degrees F

AR 4000 plus 290 degrees F

Emulsions

RS-1 70-140 degrees F

MS-1 70-160 degrees F

HFMS-1 70-160 degrees F

SS-1 70-160 degrees F

SS-1h 70-160 degrees F

CRS-1 125-185 degrees F

CSS-1 70-160 degrees F

CSS-1h 70-160 degrees F

*These temperature ranges exceed the flash point of the material and care should be taken in their heating.

NOTE: At the discretion of the contracting Officer's Representative, the Requirements of the New Jersey State Highway Department Specifications for Road and Bridge Construction (current edition) shall prevail.

3.4 APPLICATION

Following preparation and subsequent inspection of the surface, the bituminous coat shall be applied at the specified rate with uniform distribution over the surface to be treated. All areas and spots missed by the distributor shall be properly treated with the hand spray. Until the succeeding layer of pavement is placed, the surface shall be maintained by protecting the surface against damage and by repairing deficient areas at no additional cost to the Government. If required, clean dry sand shall be spread to effectively blot up any excess bituminous material. No smoking, fires, or flames other than those from the heaters that are a part of the equipment shall be permitted within 25 feet of heating, distributing, and transferring operations of bituminous material other than bituminous emulsions. To obtain uniform application of the prime coat on the surface treated at the junction of previous and subsequent applications, building paper shall be spread on the surface for a sufficient distance back from the ends of each application to start and stop the prime coat on the paper. Immediately after application, the building paper shall be removed and destroyed.

3.5 CURING PERIOD

Following application of the bituminous material and prior to application of the succeeding layer of pavement, the bituminous coat shall be allowed to cure and to obtain evaporation of any volatiles or moisture. Prime coat shall be allowed to cure without being disturbed for a period of at least 48 hours or longer, as may be necessary to attain penetration into the treated course.

3.6 FIELD QUALITY CONTROL

Samples of the bituminous material shall be tested for compliance with the applicable specified requirements. A sample shall be obtained and tested by the Contractor for every 150 tons of bituminous material used. The sample may be retained and tested by the Government at no cost to the Contractor.

3.7 SAMPLING AND TESTING

Sampling and testing shall be performed by an approved commercial testing laboratory or by facilities furnished by the Contractor. No work requiring testing will be permitted until the facilities have been inspected and approved.

3.7.1 Sampling

The samples of bituminous material, unless otherwise specified, shall be in accordance with ASTM D 140 or AASHTO T 40. Sources from which bituminous materials are to be obtained shall be selected and notification furnished the Contracting Officer within 15 days after the award of the contract.

3.7.2 Calibration Test

The Contractor shall furnish all equipment, materials, and labor necessary to calibrate the bituminous distributor. Calibration shall be made with the approved job material and prior to applying the bituminous coat material to the prepared surface. Calibration of the bituminous distributor shall be in accordance with ASTM D 2995.

3.7.3 Trial Applications

Before providing the complete bituminous coat, three lengths of at least 100 feet for the full width of the distributor bar shall be applied to evaluate the amount of bituminous material that can be satisfactorily applied.

3.7.3.1 Tack Coat Trial Application Rate

Unless otherwise authorized, the trial application rate of bituminous tack coat materials shall be applied in the amount of 0.05 gallons per square yard. Other trial applications shall be made using various amounts of material as may be deemed necessary.

3.7.3.2 Prime Coat Trial Application Rate

Unless otherwise authorized, the trial application rate of bituminous materials shall be applied in the amount of 0.25 gallon per square yard. Other trial applications shall be made using various amounts of material as may be deemed necessary.

3.7.4 Sampling and Testing During Construction

Quality control sampling and testing shall be performed as required in paragraph FIELD QUALITY CONTROL.

3.8 METHOD OF MEASUREMENT AND PAYMENT: All measurements shall be units as identified in the appropriate SLINS in the Unit Price Schedule. Measurements for preparing payments shall be taken jointly with the Government Representative.

Payment for these items shall constitute full compensation for completed work including all labor and incidentals necessary to accomplish the work required by this section of the specifications.

END OF SECTION

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