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通过实验确定基质沥青、SBS、橡胶粉、增塑剂、矿粉等组分的含量,得到一种高性能沥青混凝土路面裂缝密封胶,并将其性能与现有沥青混凝土路面修补材料如基质沥青、SBS改性沥青、市售密封胶等进行对比,分别从抗高温、抗低温、抗异物嵌入、抗腐蚀、抗拉伸性能等5个方面,结合温度、老化条件进行性能对比。结果表明:自制密封胶的软化点高达94.2℃,弹性恢复率达到98%,远优于其他3种材料,即具有较好的抗高温和抗低温性能;抗异物嵌入性能与其他3种材料基本相当;自制密封胶和市售密封胶(路斗士)经柴油腐蚀后质量损失率最小,仅为15%,即具有较佳的抗腐蚀性;基质沥青和SBS改性沥青浸水前后的拉拔强度都较低,抗拉伸性能较差,自制密封材料老化前在不同温度下都具有较高的拉拔强度,其中在0℃下高达1 MPa,但是老化后与市售密封胶性能基本相当。
The content of matrix asphalt, SBS, rubber powder, plasticizer, mineral powder and other components was determined experimentally to obtain a high-performance asphalt concrete pavement crack sealant, and its performance was compared with existing asphalt pavement repairing materials such as matrix asphalt , SBS modified asphalt and sealant on the market. The performance comparison was carried out with five aspects of high temperature resistance, low temperature resistance, anti-foreign object embedding, anti-corrosion and tensile properties. The results show that the self-made sealant has a softening point of 94.2 ℃ and an elastic recovery rate of 98%, which is far superior to the other three materials, that is, it has good high temperature resistance and low temperature resistance. The self-made sealant and the commercially available sealant (Lu Fushi) after diesel oil corrosion rate of the smallest mass loss, only 15%, that is, has better corrosion resistance; base asphalt and SBS modified asphalt before and after soaking strength Are low, tensile resistance is poor, self-made seal material before aging at different temperatures have a higher pull strength, which at 0 ℃ up to 1 MPa, but after aging and the performance of commercially available sealants are basically the same.