Research on Relationship between Fine Aggregate Angularity andAsphalt Mixture’s Anti-Shear Ability

摘要

To compare fine aggregate angularity (FAA) of three different fine aggregatesrnincluding a crushed sand, chips and a natural sand, two methods, i.e. modifiedrnUncompacted Void Content Test and modified Sand Flow Test were carried out.rnResults indicate that crushed sand’s FAA is similar to chips’ and both of them arernbetter than natural sand’s. The modified Sand Flow Test is recommended. Underrnnormal temperature, the static Triaxial Shear Strength Tests were carried out forrnSMA-13s and AC-13s, which are different in fine aggregate. These mixtures werernmade by standardized compaction or gyratory compaction method. It is discoveredrnthat that there is a direct correlation between FAA and mixture’s anti-shear ability.