Prime application is generally closely associated with a hot mix construction project. Notification will be handled with the normal procedures of the hot mix asphalt paving process.
Optimum Base Conditions
Optimum conditions that a base should have before a sprayed on prime is applied. As observed by Senadheera and Vignarajah ( TEXDOT 2007)
Prime coat materials are either cutback asphalts or emulsified asphalts, which are diluted or cut or with a petroleum solvent or emulsified with water, respectively. Further dilution is usually not required. Therefore, most agencies specify application rates based on the volume of the delivered product per unit area. Confusion rarely occurs unless the prime is diluted further to aid in application. To avoid confusion, the Hot-Mix Asphalt Paving Handbook 2000 (5) recommends application rates be based on residual asphalt content. The shot rate or application rate to achievethe specified residual asphalt content can be determined using the following formula:
AR = RAR / RAC 
Where: AR = application or shot rate of undiluted prime
RAR = specified residual application rate
RAC = residual asphalt content of prime
There is good agreement in the literature on application rates. The Asphalt Institute recommends application rates of 0.9 to 2.3 L/m2 (0.2 to 0.5 gal/yd2) for MC cutbacks and 0.5 to 1.4 L/m2 per 25 mm of depth (0.1 to 0.3 gal/yd2 /in depth) for asphalt emulsions. Others recommend from 0.65 L/m2 to 2.0 L/m2 (0.15 to 0.45 gal/yd2). Application rates should vary based on the openness of the base and no more prime should be placed than can be absorbed by the granular base in 24 hours. Any excess should be removed with blotter sand.
Prime Coat Curing
Prime coat must cure completely to function properly. Prime coats generally take several days to properly cure so they can withstand construction traffic.
Any excess prime that is not absorbed into the aggregate base course after 24 hours should be removed with blotter sand to prevent wash off into waterways and tracking and pickup of the material by traffic.