4 Aggregate Specifications and Requirements - INThe Specifications for aggregates are detailed in Section 904 and other sections for the .. application. Acid insoluble requirements do not apply to crushed gravel, . conditions to obtain high-friction, skid-resistant HMA surface courses. ITM.specification for crushed aggregate surface course,Aggregate Basepavement, in accordance with the Standard Specifications, except as . [For base course under runway and taxiway surfaces, use Section 29, FAA Item P-209.] . The crushed coarse aggregate shall have a percent of wear not more than 50 at.
specification for crushed aggregate surface course