岩沥青与SBS复合改性高黏沥青的配比研究

Study on the ratio of rock asphalt and SBS composite modified high viscosity asphalt

以中海AH-70#基质沥青为基本原料,采用中东天然岩沥青与SBS改性剂复合改性制备高黏沥青。通过均匀设计的方法设计岩沥青与SBS改性剂的复配材料组成,并采用针入度试验、延度试验、软化点试验、60℃动力黏度试验、布氏黏度试验以及DSR试验对复合改性高黏沥青的性能进行测试。结果表明:针入度和延度受岩沥青掺比的控制影响较大;而软化点受SBS改性剂掺比的控制影响较大;复合掺量与60℃动力黏度、布氏黏度以及抗车辙因子均成正相关关系。基于试验分析,采用SPSS软件建立回归模型,运用MATLAB软件计算分析得到天然岩沥青与SBS改性剂的最佳复合掺配比例分别为:5.4%和6.4%。

In this paper,the composite modified high viscosity asphalt was prepared by using the AH-70#matrix asphalt,the Middle East natural rock asphalt and the SBS modifier.The combination of rock bitumen and SBS modifier was designed by using homogeneous design method and the performance of modified asphalt was determined by penetration test,ductility test,softening point test,60℃dynamic viscosity test,Brookfield viscosity test and DSR test.The test shows that the amount of rock asphalt has a great influence on the penetration degree and the ductility,the amount of SBS modifier has a great influence on the softening point and the compound content has a positive correlation with the 60℃dynamic viscosity,the Brookfield viscosity and the anti-rutting factor.Through the test analysis,SPSS software was used to establish regression model,and MATLAB software was used to calculate and analyze the optimal mix proportion of natural rock asphalt and SBS modifier:5.4%and 6.4%,respectively.