Effect of binder and composition on the creep modulus of epoxy asphalt mixtures

摘要

This report presents an evaluation of the effect of epoxy asphalt cement and composition of aggregates on the creep modulus of epoxy asphalt mixtures, which were manufactured at the dense-graded aggregate composition and open-graded aggregate compositions for the each of the two epoxy asphalt cements. A bending creep test was conducted to measure bending creep properties of the four epoxy asphalt mixtures. A lower temperature and a shorter loading time produced higher creep modulus values. This result indicates that the epoxy asphalt mixture becomes less viscoelastic as the temperature decreases and loading time decreases. The composite master creep modulus curves at 20℃ for the four mixtures demonstrated the effects of the different binders and aggregate compositions, especially at longer loading periods. The epoxy asphalt mixture with a dense-graded aggregate composition and much epoxy resin in the binder showed highest creep modulus values.