半刚性基层沥青路面裂缝处治技术研究

Research on Crack Treatment Technology of Semi-rigid Base Asphalt Pavement

摘要:

针对半刚性基层沥青路面裂缝类型分布特征及成因进行分析，采用不同比列的聚氨酯PU和环氧丙烯酸酯VE调配值得聚合物改性裂缝修复材料，对不同编号（0.1PU+0.4VE、0.2PU+0.3VE、0.3PU+0.2VE、0.4PU+0.1VE）的聚合物改性修复材料进行粘结强度和拉伸强度的测试分析。在此基础上，分别将不同比例的聚合物修复材料用于马歇尔试样和低温小梁试样的裂缝修补中，并针对低温劈裂、低温弯拉和水稳定性进行综合分析。试验表明0.3PU+0.2VE的聚合物改性材料具备较好的劈裂强度、抗弯拉强度和水稳定性，将其应用于实际裂缝修补工作中亦获得较好的应用效果。

Abstract:

The distribution characteristics and causes of cracks in the semi-rigid base asphalt pavement are analyzed. The different ratios of polyurethane PU and epoxy acrylate VE are used to prepare the polymer modified crack repair materials. The bond strengths and tensile strengths of polymer modified repair materials with the different numbers of 0.1PU+0.4VE, 0.2PU+0.3VE, 0.3PU+0.2VE and 0.4PU+0.1VE are tested and analyzed. On this basis, the polymer repair materials with the different ratios are used in the crack repair of Marshall Specimen and low-temperature trabecular specimen. And the low-temperature splitting, low-temperature bending tensile and water stability are comprehensively analyzed. The test shows that the polymer modified material with 0.3PU + 0.2VE has the better splitting strength, bending tensile strength and water stability. The good effect of its application in the practical crack repair engineering is obtained.