不同温拌剂对沥青粘弹性、疲劳性能的影响  

Impact of Different Warm- mixing Additives on Viscoelasticity and Fatigue Properties of Asphalt

作　　者：樊亮[1,2] 胡家波[1,2] 李永镇 王召强 马士杰 

机构地区：[1]高速公路养护技术交通行业重点实验室,济南250031 [2]山东省交通科学研究所,济南250033 [3]青岛市市政工程设计研究院,青岛266061

出　　处：《武汉理工大学学报（交通科学与工程版）》2015年第2期320-324,共5页Journal of Wuhan University of Technology（Transportation Science & Engineering）

基　　金：住房和城乡建设部科技计划项目(批准号:2012-K4-32);山东省交通科技项目(批准号:2012Y01)资助

摘　　要：利用动态剪切流变仪评价了3种温拌剂对沥青流变性能的影响.结果表明温拌剂因为不同的化学组成而对沥青的流变性能有着不同的影响.Sasobit和Leadcap可以凭借结晶行为对沥青产生模量增效效果,改变沥青的粘弹性结构,并以Sasobit的增效最为显著;而矿物发泡型外加剂在6~8%掺量内不会带来沥青明显的模量增效,仅在低温时由于填料补强的作用,对沥青的粘弹性结构产生影响.时间扫描带来的疲劳指标表明,由于成分和相对分子质量的不同,Leadcap,Sasobit可以提高基础沥青的耐疲劳性能,但矿物发泡型温拌剂,并不能带来这种效果.Dynamic shear rheometer was used to evaluate rheological performance of asphalts mixed with three warm-mixing additives,and the final result showed that different chemical compositions in warm-mixing additives decide different rheological performance of asphalts.Sasobit and Leadcap can provide neat asphalt with an apparent modulus increase and influence asphalt viscoelasticity because of recrystallization behaviors;but asphalt-min additive has no this effect in a content range of 6~8%,only slightly influence viscoelasticity in lower temperature.Fatigue indexes from time sweep test show that,because of the difference of chemical composition and molecular,Leadcap and Sasobit can improve fatigue performance of neat asphalt,but asphalt-min additive cannot provide this effect.

关 键 词：温拌剂 沥青 粘弹性 疲劳性能 模量增效 

分 类 号：U414.75[交通运输工程—道路与铁道工程]