微波作用下羰基铁粉填充沥青混合料的自愈合性能研究  

Study on the self-healing properties of carbonyl-iron powder filled with asphalt mixture under microwave action

作　　者：赵毅[1,2] 孔斌 金万军 郑煜 ZHAO Yi;KONG Bin;JIN Wan-jun;ZHENG Yu(National&Local Joint Engineering Laboratory of Traffic Civil Engineering Materials,Chongqing Jiaotong University,Chongqing 400074,China;School of Materials Science and Engineering,Chongqing Jiaotong University,Chongqing 400074,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Hebei Qiancao Expressway Development Co.,Ltd.,Tangshan 063200,China;Chongqing Shengzan Construction Engineering Co.,Ltd.,Chongqing 404100,China)

机构地区：[1]重庆交通大学交通土建工程材料国家地方联合工程实验室,重庆400074 [2]重庆交通大学材料科学与工程学院,重庆400074 [3]重庆交通大学土木工程学院,重庆400074 [4]河北迁曹高速公路开发有限公司,河北唐山063200 [5]重庆晟赞建设工程有限公司,重庆404100

出　　处：《应用化工》2023年第4期1078-1082,共5页Applied Chemical Industry

基　　金：河北省交通运输厅科技项目(QC2018-3);重庆市研究生联合培养基地建设项目(JDLHPYJD2021011);重庆交通大学交通土建工程材料国家地方联合工程实验室开放基金项目(LHSYS-2021-002)。

摘　　要：羰基铁粉作为一种性能优异的吸波材料,具有良好的微波吸收能力,可用于沥青路面微裂缝自愈合。通过马歇尔试验研发了掺入羰基铁粉的吸波沥青混合料,基于微波加热技术和半圆弯曲(SCB)试验,研究了羰基铁粉掺量、愈合时间、微波加热时间、微波功率和裂缝深度等因素对吸波沥青混合料自愈合效率的影响。同时,利用XRD进行羰基铁粉微观分析。结果表明,羰基铁粉的加入能显著提高沥青混合料的自愈合能力。当在沥青混合料中掺入70%羰基铁粉(矿粉体积分数)时,微波加热120 s,并在温度25℃下愈合18 h后,其愈合率可达到78.93%,具有良好的自愈合效果。As an excellent absorbing material,carbonyl-iron powder has good microwave absorption ability and can be used for self-healing of microcracks in asphalt pavement.A microwave-absorbing asphalt mixture mixed with carbonyl-iron powder was developed by Marshall test.Based on microwave heating technology and semi-circular bending(SCB)test,the effects of carbonyl-iron powder content,healing time,microwave heating time,microwave power and crack depth on the self-healing efficiency of microwave-absorbing asphalt mixture were studied.And microscopic analysis of the carbonyl-iron powder was performed using XRD.The results show that the addition of base carbonyl-iron powder can significantly improve the self-healing ability of the asphalt mixture.When the 70%carbonyl-iron powder(volume fraction of mineral powders)is filled into the asphalt mixture,the healing rate can reach 78.93%after 120 s and 18 h at 25℃,showing a good self-healing effect.

关 键 词：羰基铁粉 沥青混合料 微波加热 SCB 自愈合 

分 类 号：TQ072[化学工程] TQ079