微波活化对橡胶沥青粘度及分子量的影响  

Effect of microwave activation on viscosity and molecular weight of crumb rubber asphalt

作　　者：李晓平 马伟中 乔衡 颜鲁春 李海莲[3] 

机构地区：[1]甘肃省公路发展集团有限公司,甘肃兰州730070 [2]甘肃省公路路网监测重点实验室,甘肃兰州730070 [3]兰州交通大学土木工程学院,甘肃兰州730070

出　　处：《中国建材科技》2018年第1期90-92,共3页China Building Materials Science & Technology

基　　金：甘肃省杰出青年基金项目(1606RJDA318);甘肃省自然科学基金项目(1506RJZA064);兰州交通大学优秀科研团队项目(201606)

摘　　要：为了探究胶粉微波辐射后对改性沥青粘度和分子量分布的影响,采用5种不同的微波时间对废胎胶粉进行活化处理,并制备胶粉改性沥青。通过布氏粘度和凝胶渗透色谱试验,得到胶粉改性沥青的粘度和分子量分布。结果表明:胶粉经过微波活化后,橡胶沥青粘度和大分子含量均有所下降,当胶粉活化时间为90s时,胶粉改性沥青的粘度和大分子含量均最小;橡胶沥青的粘度与其大分子含量有较强的相关性,随着大分子含量越高,沥青粘度越大。In this paper, the effects of different activation time on the viscosity and molecular weight distribution, the internal interaction of rubber asphalt were studied by using 5 different microwave activation time to modify the waste tire powder and the rubber asphalt was prepared.The changes of viscosity and molecular weight distribution of rubber modified asphalt were analyzed by Brookfield viscosity test and gel permeation chromatography. The results show that the viscosity and macromolecule content of modified asphalt decreased after microwave activation,when the activation time is 90s,the viscosity and macromolecule content of rubber asphalt are the smallest,the correlation between the viscosity and macromolecule content is the strong,the interaction between the powder and the asphalt has the most significant effect on the performance of the rubber asphalt.

关 键 词：道路工程 微波活化 橡胶沥青 粘度 分子量 

分 类 号：U414[交通运输工程—道路与铁道工程]