405PRIME COAT

405.01Description

This work shall consist of preparing and treating a rubblized PCCP with asphalt material in accordance with 105.03.

MATERIALS

405.02Asphalt Materials

The type and grade of asphalt material shall be in accordance with the following: 10

Asphalt Emulsion, AE-PL ........................................... 902.01(b)

405.03Cover 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

405.04Weather 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.

405.05Equipment

A distributor and aggregate spreader in accordance with 409.03 shall be used.

405.06Preparation 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.

405.07Application 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.

405.08Cover Aggregate

If the asphalt material fails to penetrate and the primed surface must be used by traffic, cover aggregate shall be spread to provide a dry surface. 405.08

405.09Method 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.

405.10Basis 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