基于多应力蠕变恢复试验的温拌沥青高温性能  

High temperature performance of warm mixed asphalt based on multi-stress creep recovery test

作　　者：雷俊安 郑南翔[1] 许新权 吴传海 吕大伟 吕明敏 LEI Junan;ZHENG Nanxiang;XU Xinquan;WU Chuanhai;LYU Dawei;LYU Mingmin(School of Highway, Chang′an University, Xi′an, Shaanxi 710064, China;Guangdong Hualu Communications Technology Co., Ltd., Guang-zhou, Guangdong 510420, China;Guangdong Road & Bridge Construction Development Co., Ltd., Guangzhou, Guangdong 510623, China)

机构地区：[1]长安大学公路学院,陕西西安710064 [2]广东华路交通科技有限公司,广东广州510420 [3]广东省路桥建设发展有限公司,广东广州510623

出　　处：《江苏大学学报（自然科学版）》2020年第4期459-465,共7页Journal of Jiangsu University：Natural Science Edition

基　　金：广东省生态敏感山区高速公路绿色建设关键技术研究项目(科技-2017-01-002)。

摘　　要：选择Evotherm^3G和EC120两种温拌剂加入基质沥青和SBS改性沥青中,配制温拌沥青.采用多应力蠕变恢复试验,对短期老化前后温拌沥青的高温性能进行评价.结果表明:两种温拌剂对沥青高温性能的影响表现出明显的差异性;Evotherm^3G温拌剂增加了沥青的应变,降低了沥青的蠕变恢复率,提高了沥青不可恢复蠕变柔量;EC120温拌剂降低了沥青的应变,提高了沥青的蠕变恢复率,降低了沥青不可恢复蠕变柔量;EC120比Evotherm^3G更能提升沥青的高温性能,但两种温拌剂均能不同程度地提高沥青的应力敏感性;短期老化提高了基质沥青的高温性能,但对改性沥青高温性能有所削弱.Evotherm^3G and EC120 warm agents were added into the matrix and SBS modified asphalt to prepare warm mixed asphalt.The multi-stress creep recovery test was used to evaluate the high temperature performance of warm mixed asphalt before and after short-term aging.The results show that the effects of two warm agents on the high temperature performance of asphalt are obviously different.By adding Evotherm^3G warm agent,the strain of asphalt is increased,and the creep recovery rate of asphalt is decreased with improved non-recoverable creep compliance of asphalt.By adding EC120 warm agent,the strain of asphalt is decreased,and the creep recovery rate of asphalt is improved with decreased non-recoverable creep compliance of asphalt.Adding EC120 warm agent can improve the high temperature performance of asphalt better than adding Evotherm^3G warm agent,while both warm agents can improve the stress sensitivity of asphalt with different degrees.The short-term aging improves the high temperature performance of matrix asphalt,but weakens the high temperature performance of modified asphalt.

关 键 词：沥青 温拌剂 高温性能 应变 多应力蠕变恢复试验 

分 类 号：U414[交通运输工程—道路与铁道工程]