The emulsion serves as the binder to hold the crushed aggregate together and adhere it to the old road surface. Various emulsions and aggregates are used to meet the conditions, specifications and requirements of individual projects.
Emulsion of varying composition and setting times are mixed with one of three grades of aggregates – Type I (fine), Type II (general), and Type III (coarse). Fine aggregate mixtures are used for maximum crack penetration and sealing in low-density/low-wear traffic areas.
Type II aggregates are used on moderate-to-heavy traffic roads to seal, correct moderate-to-severe raveling, rejuvenate oxidized surfaces, and improve skid resistance. Coarse aggregate slurry mixtures are used to correct severe surface conditions and improve skid resistance on roads with heavy traffic loads.