Investigation on Preparation and Performance of Micro-Powder Rubber Modified Asphalt
One micro-powder rubber (styrene butadiene rubber-SBR) at three concentration levels are used for manufacturing polymer modified asphalt with a mixing technique. The effects of concentration of modifiers and mixing temperature on the mechanical properties of the compounds are investigated. Based on a limited study, test results indicate that micro-powder rubbers have positive effect on the performance of asphalt in low temperature. Soft point, penetration and ductility show that the ideal percentage of rubber additive (7 wt. %) and preparing temperature (210℃) are brought forward. The fluorescence microscopy test indicates that rubbers are homogeneous dispersedin asphalt and have a little dissolving at the surface of the ultra-fine rubbers. The difference between soft point values in the high temperature storage stability test is only 0.2～0.5℃, which proves that modified asphalts have good storage stability. Complex modulus master curves are drawn to analyze and compare the rheological properties of various modified asphalts. Results indicate that modified asphalt binders have more excellent properties at both high and low temperatures, compared with original asphalt.
Micro-powder rubber Morphology Fluorescence microscopy Rheology
Conghui Liu Shaopeng Wu Hong Wang Yuan Zhang
Key Laboratory of Silicate Materials Science and Engineering of Ministry of Education,Wuhan University of Technology, Wuhan 430070, China
国际会议
10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)
西安
英文
351-354
2009-01-13（万方平台首次上网日期，不代表论文的发表时间）