硅烷偶联剂改性再生集料及其在沥青混凝土中的应用  

Silane Coupling Agent Modified Recycled Aggregate and Its Application in Asphalt Concrete

作　　者：张文腾 黄磊 邓贵坤 李希 韩艺冰 陈宗武 ZHANG Wen-teng;HUANG Lei;DENG Gui-kun;LI Xi;HAN Yi-bing;CHEN Zong-wu(Faculty of Engineering,China University of Geosciences(Wuhan),Wuhan 430070,China)

机构地区：[1]中国地质大学(武汉)工程学院,武汉430070

出　　处：《建材世界》2024年第6期6-8,共3页The World of Building Materials

基　　金：大学生创新创业训练项目(S202310491093、S202410491206、S202310491034)。

摘　　要：该研究探讨了采用硅烷偶联剂对再生粗集料进行强化处理的可行性,重点分析了硅烷偶联剂改性前后再生集料的吸水率、表观相对密度、压碎值和洛杉矶磨耗损失及其沥青混凝土的高温性能。结果表明,硅烷偶联剂改性后的再生集料,吸水率、表观相对密度、压碎值和洛杉矶磨耗损失分别为0.7%、2.612、24.1%和25.5%,满足《公路沥青路面施工技术规范》(JTG F40—2004)对粗集料技术性质的要求。对于采用改性再生粗集料制备的沥青混凝土,当轮压从0.7 MPa提升至0.9 MPa时,其车辙深度增加了90.4%,动稳定度则下降了48.8%。因此,硅烷偶联剂改性再生粗集料不宜在重载交通环境下使用。This study explores the feasibility of using silane coupling agent to strengthen the recycled coarse aggregate,with a focus on analyzing the water absorption,apparent relative density,crushing value,Los Angeles abrasion loss of recycled coarse aggregate,and high-temperature performance of its asphalt concrete before and after modification with silane coupling agent.Results show that recycled aggregate modified with silane coupling agent has a water absorption,apparent relative density,crushing value,and Los Angeles abrasion loss of 0.7%,2.612%,24.1%,and 25.5%,respectively,which meet the requirements of the Technical Specification for Construction of Highway Asphalt Pavement(JTG F40—2004)for the technical properties of coarse aggregate.For asphalt concrete prepared with modified recycled coarse aggregate,when the tire pressure is increased from 0.7 MPa to 0.9 MPa,the rutting depth increases by 90.4%and the dynamic stability decreases by 48.8%.Therefore,silane coupling agent modified recycled coarse aggregate is not suitable for use in heavy traffic environments.

关 键 词：硅烷偶联剂 再生集料 沥青混凝土 高温性能 

分 类 号：U414[交通运输工程—道路与铁道工程]