再生沥青胶浆低温蠕变特性研究  

Study on low temperature creep characteristics of recycled asphalt mortar

作　　者：张高放 来平 李萍[2] 陈隆建 李宁 ZHANG Gao-fang;LAI Ping;LI Ping;CHEN Long-jian;LI Ning(China Railway 21st Bureau Fourth Engineering Co.Ltd.,Xining 811600,China;School of Civil Engineering,Lanzhou University of Technology,Lanzhou 730050,China)

机构地区：[1]中铁二十一局第四工程有限公司,青海西宁811600 [2]兰州理工大学土木工程学院,甘肃兰州730050

出　　处：《兰州理工大学学报》2025年第2期118-125,共8页Journal of Lanzhou University of Technology

基　　金：国家自然科学基金(52268070);甘肃省重点科技攻关项目(20YF3GA017)。

摘　　要：为研究路面回收沥青再生后的沥青胶浆低温蠕变特性,通过弯曲梁流变仪(BBR)试验分析在特定的低温环境下原始回收沥青胶浆及再生剂改性沥青胶浆的性能.结果表明,回收沥青胶浆和再生回收沥青胶浆的劲度模量均随着加载时间的增大而逐渐减小、蠕变速率均随着加载时间的增大而逐渐增大;再生剂的掺量和再生沥青胶浆的劲度模量成反比和其蠕变速率成反比例关系;随着再生剂掺量的增加,再生回收沥青胶浆的抗低温开裂性能有所提高.In order to study the low-temperature creep characteristics of recycled asphalt binder from reclaimed pavement materials,bending beam rheometer(BBR)tests were performed to evaluate the performance characteristics of both the original reclaimed asphalt binder and rejuvenator-modified asphalt binder.The results show that both the stiffness modulus of the recycled asphalt glue and the recycled asphalt glue gradually decrease with the increase of loading time,while the creep rate gradually increases with the increase of loading time.The blending amount is inversely proportional to the stiffness modulus of the reclaimed asphalt mortar and its creep rate is inversely proportional.Additionally,as the amount of regenerant increases,the low-temperature cracking resistance of the reclaimed asphalt mortar improves.

关 键 词：回收沥青胶浆 再生剂 BBR 低温蠕变特性 劲度模量 蠕变速率 

分 类 号：U414[交通运输工程—道路与铁道工程]