摘要
将苯乙烯 -丁二烯 -苯乙烯 ( SBS)聚合物改性沥青用常规试验方法 (针入度、软化点、动粘度及脆点 )与动态力学分析方法所得到的试验结果进行比较研究 .结果表明 ,SBS聚合物能有效提高沥青的粘弹性 ,但这种提高作用不能用常规方法进行检验 ,只能通过动态力学分析得到证实 ;用常规方法和动态力学方法所测得的参数之间存在一定的相关关系 ;针入度、软化点等参数不能用来评估
Thy results of conventional tests (penetration, softening point, kinematical viscosity and Fraass breaking point) and those of dynamic mechanical analysis (DMA) on Styrene Butadiene Styrene (SBS) polymer modified bitumen are systematically compared. It is demonstrated that SBS modification improves the viscoelastic properties of bitumen, which can be tested using DMA but not conventional methods. The comparison also shows that there are certain relationships between parameters obtained using conventional methods and DMA, such as between penetration and complex modulus, kinematical viscosity and complex viscosity, and Fraass breaking point and glass transition temperature. The most important conclusion of the study is that such conventional test parameters as penetration and softening point are not suitable for demonstrating characterization of rheological properties of SBS modified bitumen.
出处
《中南林学院学报》
CSCD
2002年第1期78-81,共4页
Journal of Central South Forestry University
关键词
道路材料
聚合物改性沥青
SBS聚合物
流变特性
常规试验方法
动态力学分析
highway materials
polymer modified bitumen
Styrene Butadiene Styrene polymer
rheological characterization
conventional methods
dynamic mechanical analysis
