Abstract
Whether the engineering characteristics of bituminous mixes (especially their resistance to moisture effects) can be improved by washing the coarse aggregates and mixing the coarse and fine aggregatesseparately has been investigated. Results indicated that the washing of the coarse aggregate was most effective with the weaker aggregate. Washing the coarse aggregates generally improves the strength characteristics and reduces the asphalt content required to attain a certain level of strength, density, and air voids. This paper appearsin transportation research record no. 1323, Asphalt mix materials 1991