摘要
为了解决溶剂型冷补混合料强度形成慢、水稳定性和耐久性差等问题,选择聚氨酯预聚体作为胶结料分别制备聚氨酯冷补混合料AC-13(A1)和LB-13(A2),选择聚氨酯预聚体和沥青制备聚氨酯改性沥青,再分别制得聚氨酯改性沥青冷补混合料AC-13(B1)和LB-13(B2),通过室内试验对其路用性能开展研究。结果表明:AC-13(A1)的动稳定度、残留稳定度比、冻融劈裂强度比和最大破坏应变分别达到54321次/mm、91.0%、88.2%和5105με,AC-13(B1)的动稳定度、残留稳定度比、冻融劈裂强度比和最大破坏应变分别达到23545次/mm、89.9%、84.6%和3657με,AC-13(A1)相比于AC-13(B1)、LB-13(A2)和LB-13(B2)的动稳定度、残留稳定度比、冻融劈裂强度比和最大破坏应变均较高。AC-13相比于LB-13冷补混合料的路用性能较优,并且采用聚氨酯预聚体制备的AC型冷补混合料路用性能最优。
In order to solve the problems of slow strength formation,poor water stability and durability of solvent-based cold patch mixture,polyurethane prepolymer was selected as binder to prepare the cold patch mixtures AC-13(A1)and LB-13(A2),and polyurethane prepolymer and asphalt were selected to prepare asphalt modified polyurethane,then cold repair mixture AC-13(B1)and LB-13(B2)were prepared respectively,and their road performance was studied through laboratory tests.The results showed that the dynamic stability,residual stability,splitting strength ratio and maximum failure strain of AC-13(A1)reached 54321 times/mm,91.0%,88.2%and 5105με,respectively.The dynamic stability,residual stability,splitting strength ratio and maximum failure strain of AC-13(B1)reached 23,545 times/mm,89.9%,84.6%and 3,657με,respectively.AC-13(A1)had higher dynamic stability,residual stability,splitting strength ratio and maximum failure strain,compared with AC-13(B1),LB-13(A2)and LB-13(B2).The road performance of AC-13 was better than that of LB-13,and the road performance of AC type cold reinforced mixture prepared by polyurethane prepolymer was the best.
作者
刘林林
晏应
李靖
LIU Linlin;YAN Ying;LI Jing(Jiangsu Xiandai Road&Bridge Co.Ltd,Jiangsu Highway Green Maintenance Engineering Technology Research Center,Nanjing 210018,China)
出处
《聚氨酯工业》
CAS
2023年第5期21-24,共4页
Polyurethane Industry
关键词
沥青路面
坑槽修补
聚氨酯
冷补混合料
路用性能
asphalt pavement
pit repair
polyurethane
cold feeding mixture
road performance
