基于微观结构量化的SBS改性沥青分析

针对SBS(苯乙烯-丁二烯-苯乙烯嵌段共聚物)改性沥青显微结构的量化研究方法,以SBS改性沥青偏光400倍显微结构图为研究对象,在已有量化分析方法的基础上,提出一种定量评价SBS改性沥青微观结构新方法.结果表明:新方法操作相对简单,可从微观角度量化分析不同改性剂对SBS改性沥青性能的影响,结论与试验结果一致.

Novel performance measurements of SBS modified asphalt based on microstructure pictures

This study aims to establish novel quantitative performance measurements for styrene butadiene styrene(SBS) block copolymer modified asphalt based on microstructure pictures of asphalt specimens. By magnifying pictures by 400 times via microscope, two new measurements including area ratio of modifier and homogeneity of modifier distribution were tested for asphalt specimens with three different modifiers. Then an investigation was made into the relationship between two new measurements and traditional measurements including penetration number, ductility rotational and viscosity rotary. The results show that they have a good correlation. Quantitative measurements through microstructure pictures are reliable and easy to evaluate performance of asphalt.