413.1 General Description
This work includes furnishing and applying a bituminous tack coat on a prepared road surface including cleaning the road surface.
413.1.01 Definitions
General Provisions 101 through 150.
413.1.02 Related References
A. Standard Specifications Section 109—Measurement and Payment Section 400—Hot Mix Asphaltic Concrete Construction Section 424—Bituminous Surface Treatment Section 427—Emulsified Asphalt Slurry Seal Section 820—Asphalt Cement Section 822 – Emulsified Asphalt Section 824—Cationic Asphalt Emulsion SOP 4 B. Referenced Documents General Provisions 101 through 150.
413.1.03 Submittals
A. Invoices Furnish formal written invoices from a supplier for the bituminous materials for sole use of tack coat when requested by the Department. Show the following on the Bill of Lading: • Date Manufactured for emulsified asphalt materials. • Date shipped • Quantity in gallons • Included with or without additives
413.2 Materials
Ensure materials meet the following specifications: TABLE 1 – BITUMINOUS MATERIALS Material Section Asphalt cement, performance grade PG 58-22, PG 64-22, or PG 67-22 820.2.01 Approved non-tracking Anionic Emulsified Asphalt 822.2.01 Cationic emulsified asphalt CSS-1h, CRS-1h, CRS-2h, CRS-3, CQS- 1h and other approved non-tracking cationic emulsified asphalt products listed on QPL 7
824.2 01
Use any of the materials shown in Table 1as bituminous tack coat for work performed under Section 400 as directed by the Engineer. The Department may change the grade or type of bituminous materials without a change in the Contract Unit Price if the Engineer determines the grade or type selected is not performing satisfactorily.
413.2.01 Delivery, Storage, and Handling
General Provisions 101 through 150. Emulsified Asphalt Maintain all equipment used for the delivery, storage, and handling of anionic emulsified asphalt or cationic emulsified asphalt to prevent contamination of the emulsion. Transfer anionic emulsified asphalt or cationic emulsified asphalt directly to the pressure distributor from the transport tanker. Emulsified asphalt may be stored in an onsite bituminous storage tank in accordance with Note 1. Provide and maintain temperature measuring devices to continuously monitor the temperature of anionic emulsified asphalt or cationic emulsified asphalt in storage and in the pressure distributor. Do not allow anionic emulsified asphalt or cationic emulsified asphalt to freeze. Note 1: Asphalt emulsion that has been stored longer than 30 days from the time of initial manufacture shall be tested and approved for compliance with specified requirements prior to being used as tack coat for work performed under Section 400
413.3 Construction Requirements
413.3.01 Personnel
General Provisions 101 through 150.
413.3.02 Equipment
Provide equipment in good repair, including the following units that meet the requirements of Subsection 424.3.02, Equipment. • Power broom and blower • Pressure distributor Provide a properly cleaned distributor to avoid contamination with incompatible materials.
413.3.03 Preparation
General Provisions 101 through 150.
413.3.04 Fabrication
General Provisions 101 through 150.
413.3.05 Construction
A. Seasonal and Weather Limitation Do not apply tack coat if the existing surface is wet or frozen. Do not place emulsified asphalt if the air temperature in the shade is less than 40 °F (4 °C). B. Application Coat the entire areas to be paved with the tack coat unless directed otherwise by the Engineer. Apply tack coat with distributor spray bars instead of hand hoses, except in small areas inaccessible to spray bars. Table 2 - Application Rates for Anionic Emulsified Asphalt or Cationic Emulsified Asphalt, gal/yd2 (L/m2) Tack Uses Minimum Maximum New Asphaltic Concrete Pavement to New Asphaltic Concrete Pavement or Thin Lift Leveling 0.05 (0.23) 0.08 (0.36) New Asphaltic Concrete Pavement (≤ 25 % RAP) to Aged Existing Pavement or Milled Surface 0.06 (0.27) 0.10 (0.45) New Asphaltic Concrete Pavement (> 25 % RAP) to Aged Existing Pavement or Milled Surface 0.08 (0.36) 0.12 (0.54) • Allow standard anionic emulsified asphalt or cationic emulsified asphalt to break per emulsion manufacturer’s recommendation. Proceed with paving only after the anionic emulsified asphalt or cationic emulsified asphalt has cured to the satisfaction of the Engineer. • Do not use anionic emulsified asphalt or cationic emulsified asphalt under OGFC or PEM on interstates or limited access state routes. Note: Application rates for PG Binder Asphalt Cement are specified in Section 400.3.03.A.3.C. C. Temperature of Material Apply bituminous materials within the temperature ranges specified below. TABLE 3 – BITUMINOUS MATERIALS AND APPLICATION TEMPERATURES Bituminous Materials Temperature of Application °F (°C) Asphalt cement 350 - 400 (175 - 205) Approved non-tracking Anionic Emulsified Asphalt 140 - 180 (60 - 80) Cationic Emulsified Asphalt CSS-1h, CRS- 1h, CRS-2h, CRS-3, CQS-1h and other approved non-tracking cationic emulsified asphalt products listed on QPL 7 140 - 180 (60 - 80) D. Cleaning Immediately before applying the tack coat, clean the entire area free of loose dirt, clay, and other foreign materials. E. Application Rate The Engineer will determine the application rate of the bituminous tack coat. F. Limitations and Areas Coated Apply only enough tack coat to the prepared road surface that can be covered with the new pavement course the same working day the tack coat is applied. G. Maintenance and Protection After applying a standard emulsified asphalt tack coat material, allow it to break per emulsion manufacturer’s recommendation. Do not allow construction equipment or traffic on the tack. When directed by the Engineer, provide a revised paving plan when excessive tracking of the tack material by construction related traffic is evident.
413.3.06 Quality Acceptance
General Provisions 101 through 150.
413.3.07 Contractor Warranty and Maintenance
General Provisions 101 through 150 shall apply with specific consideration given to General Provision Sections 105.12, 105.14, and 105.16.
413.4 Measurement
Bituminous materials for tack coat applied and accepted are measured as outlined in Subsection 109.02, Measurement of Bituminous Materials. Diluting emulsified tack coat is not ordinarily allowed except when used underneath slurry seal and approved by the Engineer. The composition of diluted emulsified tack coat defined in Subsection 427.3.05, Construction is measured by the gallon (liter) of diluted mix.
413.4.01 Limits
General Provisions 101 through 150.
413.5 Payment
The accepted volume of bituminous material will be paid for at the Contract Unit Price per gallon (liter) for bituminous tack coat of the type and grade and approved by the Engineer, complete in place. Payment is full compensation for preparing, cleaning, furnishing, hauling, applying material, and providing incidentals to complete the work. Payment will be made under: Item No. 413 Tack coat Per gallon (liter)
Bituminous Tack Coat in other states
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