Study on the Performance of High-Volume Medium-temperature Recycled Asphalt Mixtures
The medium temperature recycled asphalt was prepared by medium-temperature regenerant agent,and the mixing temperature and road performance of medium-temperature recycled asphalt mixture were studied.By drawing the viscosity-temperature curve of medium-temperature asphalt and combining the Marshall test index of medium-temperature recycled asphalt mixture,the preparation and molding tempera-ture of medium-temperature recycled asphalt mixture was determined.The optimum mix ratio of medium tem-perature recycled asphalt mixture was determined by Marshall index parameters,and the road performance in-dexes of medium temperature recycled asphalt mixture and hot mix recycled asphalt mixture were compared.The results show that(1)The optimum mixing temperature of medium-temperature recycled asphalt mixture is 135 ℃,and the optimum compaction temperature is 125 ℃,which is 40 ℃ lower than that of hot mix recy-cled asphalt mixture;(2)The high temperature performance,water stability and low temperature performance of medium-temperature recycled asphalt mixture are better than those of hot mix recycled asphalt mixture;(3)With the increase of RAP content,the high temperature stability of medium-temperature recycled as-phalt mixture gradually increases,but the increase of RAP content will reduce the water stability and low tem-perature performance.
万方数据
维普
