温拌胶粉改性沥青低温性能及其与集料黏附性分析  

Analysis of Low Temperature Performance of Warm Mix Crumb Rubber Powder Modified Asphalt and Its Adhesion to Aggregate

作　　者：陈白银霜 王岚[1,2] 张琪 周晓东 罗学东 CHEN Baiyinshuang;WANG Lan;ZHANG Qi;ZHOU Xiaodong;LUO Xuedong(Key Laboratory of Civil Engineering Structure and Mechanics of Inner Mongolia Autonomous Region,Inner Mongolia University of Technology,Hohhot 010051,China;School of Civil Engineering,Inner Mongolia University of Technology,Hohhot 010051,China;Pioneer College,Inner Mongolia University,Hohhot 010070,China;Inner Mongolia Transportation Design and Research Institute Co.,Ltd.,Hohhot 010010,China;Guangzhou Agile Investment Co.,Ltd.,Guangzhou 511495,China)

机构地区：[1]内蒙古工业大学,内蒙古自治区土木工程结构与力学重点实验室,呼和浩特010051 [2]内蒙古工业大学土木工程学院,呼和浩特010051 [3]内蒙古大学创业学院,呼和浩特010070 [4]内蒙古交通设计研究院有限责任公司,呼和浩特010010 [5]广州敏捷投资有限公司,广州511495

出　　处：《硅酸盐通报》2022年第2期704-714,共11页Bulletin of the Chinese Ceramic Society

基　　金：国家自然科学基金(11762012);内蒙古自治区科技计划(2019GG031)。

摘　　要：通过弯曲梁流变(BBR)试验、接触角测量及原子力显微镜(AFM)测试等方法,从宏观和微观角度对老化前后温拌胶粉改性沥青(WCR)低温抗裂性及其与集料黏附性的变化规律进行研究,并以热拌胶粉改性沥青(HCR)作为对比。结果表明:随着老化程度的加深,HCR、WCR的蠕变速率(m)和弯曲蠕变劲度(S)的比值(m/S)减小,低温抗裂性能变差,WCR的低温抗裂、抗老化性能均优于HCR;老化前后HCR、WCR与三种集料的黏附性能大小依次为石灰岩>玄武岩>花岗岩,WCR与集料的黏附性均优于HCR;老化前后两种沥青的微观Derjaguin-Muller-Toporov(DMT)模量与低温流变参数(m/S)呈良好线性关系,且基于Johnson-Kendall-Roberts(JKR)力学模型得到的微观表面能、黏附功分别与基于表面能理论得到的宏观表面能、黏附功呈较强相关性。Through bending beam rheological(BBR)test,contact angle measurement and atomic force microscope(AFM)test,the low temperature crack resistance of warm mix crumb rubber powder modified asphalt(WCR)before and after aging and its adhesion change law to aggregate were studied from macroscopic and microscopic perspectives,and hot mix crumb rubber powder modified asphalt(HCR)was used as a comparison.The results show that with the increase of aging degree,the ratio of creep rate(m)to bending creep stiffness(S)(m/S)of HCR and WCR decreases,and the low temperature crack resistance becomes worse.The low temperature crack resistance and aging resistance of WCR are better than HCR.The adhesion of HCR,WCR to three kinds of aggregates before and after aging is limestone>basalt>granite,and the adhesion of WCR to aggregates is better than that of HCR.The micro Derjaguin-Muller-Toporov(DMT)modulus of the two asphalts before and after aging has a good linear relationship with the low temperature rheological parameter(m/S),and the micro surface energy and adhesion work obtained based on Johnson-Kendall-Roberts(JKR)mechanical model has a strong correlation with the macro surface energy and adhesion work obtained based on the surface energy theory.

关 键 词：温拌胶粉改性沥青 宏微观方法 长短期老化 低温抗裂特性 表面能 黏附性 

分 类 号：U414[交通运输工程—道路与铁道工程]