中国石油大学学报（自然科学版）2017，Vol.41Issue(5)：159-168,10.DOI:10.3969/j.issn.1673-5005.2017.05.020
EVA分子结构对其改性沥青性能的影响
Effect of EVA molecular structure on properties of EVA modified asphalt
摘要
Abstract
Ethylene-vinyl acetate copolymer ( EVA) modified asphalts were prepared by two base asphalts ( AH-70 from Qin-huangdao and Karamay) and EVA modifiers with different vinyl acetate ( VA) contents in the study. Influences of different VA contents on the rheological properties, compatibility and conventional properties of EVA modified asphalts were studied u-sing dynamic mechanical analysis ( DMA) and fluorescence microscopy. The results show that in the measured frequency and temperature region, phase angle and viscous part of EVA modified asphalts increase with the VA contents increasing, while the rutting factor G*/sin δ decreases indicating the anti-rutting ability declines. With the VA contents increase, the compati-bility between of EVA and base asphalts presents the increasing trend firstly and then shows the decreasing trend. And the comprehensive properties of EVA modified asphalts are the best when the VA content is 25%. In general, the anti-rutting a-bility of Qinhuangdao EVA modified asphalts is better than that of Karamay. Nevertheless the compatibility of Karamay EVA modified asphalts is better than that of Qinhuangdao.关键词
EVA改性沥青/VA含量/动态力学分析/流变性/相容性Key words
EVA modified asphalt/VA content/dynamic mechanical analysis ( DMA)/rheological property/compatibility分类
交通工程引用本文复制引用
范维玉,任施松,梁明,钱成多,梁鹏,任方勇,罗辉,南国枝..EVA分子结构对其改性沥青性能的影响[J].中国石油大学学报（自然科学版）,2017,41(5):159-168,10.基金项目
中央高校基本科研业务费专项(24720156046A) （24720156046A）
中国石油大学研究生创新工程项目(15CX06046A) （15CX06046A）
