V形开槽修补道路反射裂缝的抗开裂性能  

Anti-cracking Performance of V-shaped Slot Repair Road Reflection Crack

作　　者：肖庆一 王文斌 任希鹏 连增强 赵振超 XIAO Qing-yi;WANG Wen-bin;REN Xi-peng;LIAN Zeng-qiang;ZHAO Zhen-chao(School of Civil Engineering and Transportation,Hebei University of Technology,Tianjin 300401,China;China Jiaotong Yuanzhou Science and Technology Co.,Ltd.,Shijiazhuang 050035,China)

机构地区：[1]河北工业大学土木与交通学院,天津300401 [2]中交远洲工程咨询有限公司,石家庄050035

出　　处：《科学技术与工程》2023年第13期5734-5743,共10页Science Technology and Engineering

基　　金：国家自然科学基金(52008154)。

摘　　要：为研究沥青路面反射裂缝的修补方法,根据反射裂缝的宽度设计了3种结构的修补材料,首先利用车辙试验、弯曲小梁试验、浸水马歇尔、冻融劈裂试验分别评价了修补材料的高温稳定性、低温抗裂性、水稳定性;其次通过拉拔强度试验与剪切强度试验确定了黏结剂的最佳洒布量;最后通过全场应变分析、断裂能等理论探讨了修补结构的抗裂性。研究结果表明:试验设计的3种修补材料基本性能均满足规范要求、V形修补结构的黏结剂最佳洒布量为0.6 kg/m^(2)、通过全场应变分析与抗裂性分析得知修补材料的弯拉强度为传统沥青灌封修补的3.36倍、修补材料的断裂能达到未开裂路面的60.1%。试验验证了开V形槽修补道路反射裂缝的可行性,为道路修补反射裂缝提供了新方法。In order to study the repair method of reflective cracks in asphalt pavement,three kinds of structural repair materials were designed according to the width of reflective cracks.Firstly,the high-temperature stability,low-temperature crack resistance and water stability of the repair materials were evaluated by rutting test,bending trabecular test,immersion Marshall test and freeze-thaw splitting test respectively.Secondly,the optimum distribution amount of binder was determined by drawing strength test and shear strength test.Finally,the crack resistance of the repaired structure was discussed through the theory of full field strain analysis and fracture energy.The research results show that the basic properties of the three kinds of repair materials designed in the test meet the requirements of the specification.The optimal distribution amount of binder for V-shaped repair structure is 0.6 kg/m^(2).Through the full field strain analysis and crack resistance analysis,it is known that the flexural tensile strength of the repair material is 3.36 times that of the traditional asphalt pouring repair,and the fracture energy of the repair material reaches 60.1%of that of the uncracked pavement.The test verifies the feasibility of repairing road reflection crack with V-shaped,and provides a new method for repairing road reflection crack.

关 键 词：交通运输工程 反射裂缝 沥青混合料 开裂 全场应变分析 

分 类 号：U418[交通运输工程—道路与铁道工程]