Durability Capacity Change of Rubber Powder Composite BRA Modified Asphalt Mixture

Abstract

Both engineering practice and literature confirm that the high modulus asphalt mixture has superior performance. If modified, the final asphalt mixture can effectively improve the service life of asphalt pavement. Therefore, the design and test of this paper are trying to mix rubber powder and BRA to prepare high modulus Sup-13 asphalt mixture. Through a series of experimental studies, this paper discusses the effect of adding rubber powder and BRA separately and the effect of adding both rubber powder and BRA into asphalt mixture on its durability. The experimental part mainly focuses on the composite modified asphalt mixture water resistance test, the high temperature stability test, and the low temperature crack resistance test, and it is concluded that the rubber powder and the BRA compound modification can equalize the improvement effect of strength, modulus, and strain. For this reason, if the rubber powder with finer particle size is adopted to modify the asphalt mixture, the low temperature crack resistance of the specimen will improve apparently.