Study on Structural Layer of Thin SBS Modified Asphalt Pavement at Low Temperature
In order to reduce the occurrence of asphalt pavement diseases in low temperature areas and improve the service life of asphalt pavement,it is studied the thin SBS modified pavement mechanism layer under low temperature conditions.The causes of asphalt pavement disease in low temperature environment were analyzed,the modified asphalt was prepared with SBS modifier,and the rheological properties of the modified asphalt were tested at high and low temperatures.Finally,the low temperature creep rate of SBS modified asphalt mixture trabecula specimen was tested to evaluate its low temperature crack resistance.The results show that with the increase of SBS modifier content,the high temperature rheological property of modified asphalt increases,while the temperature rheological property decreases.When the content of SBS modifier is 4.6％,the rheological properties at high temperature are the best and the lowest at low temperature.When AC-13 grading type was used to prepare modified asphalt mixture with the optimum oil to stone ratio of 5.3％,the trabecular creep rate was the highest and the low temperature crack resistance was better at-20℃.The results can effectively improve the pavement use condition under low temperature conditions.
low temperature environmentSBS modified asphaltlow temperature performanceconstruction quality
NETL
NSTL
万方数据
维普
