Influence of Fly Ash Substitution for Mineral Powder on High Temperature Stability of Bituminous Mixture

Fly ash is one of the most industrial waste residues in china. The utilization of fly ash has important economic significance and environmental value. Fly ash has the same physicochemical property with the limestone mineral powder, which makes it possible for replacement of mineral powder by fly ash. In this article, the Bituminous concrete 16 is taken as the basic material, the limestone mineral powder mixing amount is respectively 5%, 6%, 7%, and simultaneously the fly ash was taken to replace the limestone mineral powder completely, and then dynamic stability of the six different specimens were measured by the rutting test. The research result shows that the fly ash added can improve the high temperature stability of the bituminous mixture efficiently.