461ASPHALT PRIME COAT

461.1DESCRIPTION—This work is the conditioning and treating of an absorbent non-asphalt base course

or an absorbent existing surface with an application of emulsified asphalt and, if required, a blotter material.

461.2MATERIAL—

Application Temperature °F Class of Material Type of Material Minimum Maximum

AE-P Emulsified Asphalt 90 150 E-1 Prime Emulsified Asphalt 100 170

461.3CONSTRUCTION—

existing surfaces and the application of a tack coat.

Within the specified temperature range, select application rates for AE-P and E-1 Prime emulsified asphalt from 0.30 gallon per square yard to 0.70 gallon per square yard. Obtain approval of the applicati on rates. Uniformly distribute the tack coat at the junction of adjacent applications. Following application, do not disturb the prime coat. Allow the emulsified asphalt to penetrate the treated surface and the treated surface to absorb the emulsified asphalt until the Inspector-in-Change determines the emulsified asphalt is completely cured. Apply additional emulsified asphalt to uncoated or lightly coated areas. Twenty-four hours after applying the prime coat, cover areas the Representative identifies as showing an excess of prime coat material with sufficient dry fine aggregate to blot up or remove excess prime coat material.

areas to the Representative’s satisfaction before placing succeeding construction.

461.4MEASUREMENT AND PAYMENT—