343 SECTION 405 – PRIME COAT
405.01 Description
This work shall consist of preparing and treating a rubblized PCCP with asphalt material in accordance with 105.03. MATERIALS
405.02 Asphalt Materials
The type and grade of asphalt material shall be in accordance with the following: 10 Asphalt Emulsion, AE-PL ........................................... 902.01(b)
405.03 Cover Aggregate
Aggregate shall be in accordance with the following: Coarse Aggregate, Class B or Higher, Size No. 12 ..... 904.03 Fine Aggregate, Size No. 23 or No. 24 ........................ 904.02 CONSTRUCTION REQUIREMENTS 20
405.04 Weather Limitations
Asphalt material shall not be applied on a wet surface, when the ambient temperature is below 50°F, or when other unsuitable conditions exist, unless approved by the Engineer. 405.05 Equipment A distributor and aggregate spreader in accordance with 409.03 shall be used.
405.06 Preparation of Surface 30
The existing surface to be treated shall be shaped to the required grade and section, free from all ruts, corrugations, or other irregularities, uniformly compacted, and approved.
405.07 Application of Asphalt Material AE-PL shall be uniformly applied at the rate of 0.50 to 0.75 gal./sq yd placed in a
single application. When placing material on a rubblized base, a carpet drag shall be utilized behind the distributor. When traffic is to be maintained within the limits of the section, approximately 40 one half of the width of the section shall be treated in one application. Complete coverage of the section shall be ensured. Tr eated areas shall not be opened to traffic until the asphalt material has been absorbed. 405.08 Cover Aggregate If the asphalt material fails to penetr ate and the primed surface must be used by traffic, cover aggregate shall be spread to provide a dry surface. 405.08
405.09 Method of Measurement
Asphalt for prime coat will be measured by the ton or by the square yard. Cover 50 aggregate will be measured by the ton.
405.10 Basis of Payment
The accepted quantities of prime coat will be paid for at the contract unit price per ton or per square yard for asphalt for prime coat. The accepted quantities of cover aggregate will be paid for at the contract unit price per ton, complete in place. Payment will be made under: Pay Item Pay Unit Symbol 60 Asphalt for Prime Coat .............................................................. TON SYS Cover Aggregate, Prime Coat .................................................... TON