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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 406-2 MATERIALS. Material requirements shall be as specified in the special specifications.
406-3 CONSTRUCTION DETAILS. The construction requirements shall be as specified in the special
specifications.
406-4 METHOD OF MEASUREMENT. As specified in the special specifications.
406-5 BASIS OF PAYMENT. As specified in the special specifications.
SECTION 407 - TACK COAT
407-1 DESCRIPTION. This work shall consist of preparing and treating an existing Portland cement
concrete surface or asphalt pavement surface with tack coat in accordance with the Contract documents and as directed by the Engineer.
407-2 MATERIALS. The tack coat shall meet the applicable requirements of §702. Use of alternative
tack coat material requires prior approval by the Director, Materials Bureau.
407-3 Construction Details.
407-3.01 Equipment. A distributor shall be used for applying tack coat. The distributor shall be capable
of applying the tack coat uniformly on variable widths of surface up to 15 feet. The distributor equipment shall include a quantity measuring system and a thermometer for measuring temperature of tank contents. Prior to being used on a project, this equipment shall be calibrated in accordance with ASTM D 2995 Standard Practice for Estimating Application Rate of Bituminous Distributors or an equivalent calibration procedure acceptable to the Engineer . The Engineer will witness the equipment calibration or require the Contractor to provide documentation certifying the calibration. Distributors shall be equipped with circulation spray bars which shall be adjustable both laterally and vertically. An attached bristle broom that drags on the pavement behind the spray bars may be attached to the distributor. If the broom is used, it shal l be adjustable laterally and vertically so that the full width of the applied tack coat is bristled uniformly into the pavement surface. A bituminous material sampling valve shall be attached to the distributor. The distributor tank shall be equipped with an agitator that is capable of ensuring the tack coat remains homogeneous. Tack coat stored in the distributor tank shall be heated and maintained at a temperature between 85ºF and 160ºF. Hand operated spray units will be permitted only in areas where the use of a distributor is impractical. The Engineer will determine the final acceptance of all equipment used for applying the tack coat.
407-3.02 Application of Tack Coat. The tack coat contained in the distributor tank shall be
homogeneous. The tack coat shall be applied to a prepared clean pavement. Material shall be applied uniformly across the width of the designated area. The tack coat shall not be applied on a wet pavement surface or when the pavement surface temperature is below 40°F. The application rate shall be as determined in Table 407 -1 Tack Coat Application Rates . These are recommended application rates for tack coat on various surface types and may be modified by the Engineer.
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NEW YORK STATE DEPARTMENT OF TRANSPORTATION Sections 200 - 599 STANDARD SPECIFICATIONS (USC) January 1, 202 4 Volume 2 TABLE 407 -1 – TACK COAT APPLICATION RATES Surface Type Application Rate (gal/yd2) Diluted Tack Coat Straight Tack Coat New Asphalt Pavement 0.05 - 0.06 0.03 - 0.04 Milled Surfaces and Existing Asphalt Pavement 0.08 - 0.10 0.05 - 0.06 Portland Cement Concrete 0.08 - 0.10 0.05 - 0.06 Vertical Surfaces (curbs, drainage structures, and appurtenances) 0.09 - 0.11 0.06 - 0.07
407-3.03 Sampling. The Engineer will request samples from the Contractor at the frequency listed in
Materials Method 702 -2 Asphalt Emulsion - Quality Assurance . The Engineer will witness the Contractor sampling the material. The sample will represent all material from the same certified lot, placed that day.
407-4 METHOD OF MEASUREMENT. The quantity to be measured for payment will be in gallons of
tack coat measured at 60ºF to the nearest gallon. The following formula will be used to calculate material quantity at 60ºF: Volume @ 60ºF = Volume D x [1 - (ΔT x 0.00025)] ΔT = Delivered Temperature (ºF) - 60 Volume D = Quantity at Delivered Temperature (gallons)
407-5 BASIS OF PAYMENT. The unit price bid per gallon for tack coat shall include the cost of all
labor, materials, and equipment necessary to satisfactorily complete the work. The Regional Materials Engineer will evaluate material represented by failing samples. If the Engineer elects to leave the material in place, the Contractor shall receive a pay reduction of 75% of the tack bid price, for the pavement section represented b y the failing sample. Payment will be made under: Item No. Item Pay Unit 407.0102 Diluted Tack Coat Gallon 407.0103 Straight Tack Coat Gallon SECTIONS 408 AND 409 (VACANT) SECTION 410 – CHIP SEAL (Last Revised September, 2016)
410-1 DESCRIPTION. This work shall consist of the construction of a single course chip seal for
pavements and/or shoulders in accordance with the contract documents.
410-2 Materials
410-2.01 Bituminous Materials. The bituminous material shall meet the applicable requirements of
Section 702.
A.Bituminous Material – Pavement and Shoulders. Ensure that the bituminous material is compatible with the selected aggregate; use item 702 -3101P, 702 -3102P or 702 -4101P.
Source: New York Standard Specifications, 2024 Edition. Pages 164–164 of 1,264.