A chip seal or single surface treatment is the single most important low cost maintenance method used today. Chip seals produce an all-weather surface that renews weathered pavements, improves skid resistance, aides in lane demarcation, and seals and protects the underlying road surface.
First, repair potholes and seal large cracks in the old road surface. Allow enough curing time for these treatments before applying the chip seal. Prior to chip seal application clean the road surface using a power sweeper or rotary broom. An asphalt emulsion is then uniformly spray-applied by an asphalt emulsion distributor and then chips are applied evenly by using a self-propelled or a truck-attached mechanical spreader. A Pneumatic-tired roller is then used to embed the aggregate into the asphalt film. Finally, loose particles are removed after the chip seal treatment has cured completely.
Typical asphalt emulsions used in chip seals are CRS-2, RS-2, or HFRS-2. Additionally, for higher volume traffic roadways polymer modified versions of these asphalt emulsions can be used.
Asphalt emulsions are applied at much lower temperatures. Thus, there is energy savings and improved safety when applying a chip seal using asphalt emulsions.
You can order AEMA's Basic Asphalt Emulsion CD-Rom right here on this web site - just click here.
Asphalt Emulsion Manufacturers Association