摘要
Abstract
In order to improve the comprehensive road performance of SEAM modified asphalt mixture,the water stability,low temperature crack resistance,high temperature stability and fatigue resistance of SBS/SEAM composite modified asphalt mixtures with different amounts of SBS modifier(2.5%,3.5%,4.5%)were studied by immersion Marshall test,freeze-thaw splitting test,low temperature trabecular bending test,ordinary rutting test and four-point bending test.The 25%SEAM modified asphalt mixture and 5%SBS modified asphalt mixture were used as the control groups.The test results show that the addition of an appropriate amount of SBS significantly improves the low temperature crack resistance and water stability of SEAM modified asphalt mixture,and solves the problem that the low temperature crack resistance and water stability index of 25%SEAM modified asphalt mixture do not meet the requirements of the specification.A certain amount of SBS modifier can significantly enhance the high temperature rutting resistance and fatigue resistance of SEAM modified asphalt mixture.Considering the economic factors,an optimal SBS dosage of 3.5%is recommended.关键词
道路工程/硫磺改性剂(SEAM)/SBS/沥青混合料/路用性能Key words
road engineering/sulfur modifier(SEAM)/SBS/asphalt mixture/road performance分类
交通运输
