The 5～10 mm basalt coarse aggregate was replaced by the same grade steel slag by volume substitution method to prepare five AC-13 asphalt mixtures with different steel slag contents.After determining the composition of each grade and the ratio of oil to stone,the high temperature performance,low temperature performance,water stability and dynamic modulus of each steel slag asphalt mixture were verified.The results show that the high-temperature performance,water stability,and dynamic modulus of steel slag asphalt mixture all show a trend of first increasing and then decreasing with the increase of steel slag content.When the steel slag content reaches 75％,the properties of asphalt concrete reached the best,the dynamic stability and dynamic modulus(low temper-ature and high frequency)increase by 41.6％and 56.4％,respectively,freeze-thaw splitting strength ratio increase by 5.4 percent point compared with the traditional asphalt mixture.The increase of steel slag content has no obvious effect on the low temperature crack resistance of asphalt mixture.It is recommended to adopt 75％steel slag content for AC-13 asphalt mixture.
维普
万方数据