高性能丙烯酸类混凝土裂缝修补材料的制备

Study on Repairing Material Made of High Performance Crylic Acid Species for Concrete Pavement Cracks

以甲基丙烯酸甲酯为主剂、甲基丙烯酸丁酯为增韧剂、环氧树脂为改性剂,在过氧化苯甲酰和自制胺类体系作用下,采用正交实验开展了高性能丙烯酸类混凝土裂缝修补材料的制备研究,分析了各组分用量对修补材料初始黏度、抗拉强度、断裂伸长率及粘结强度等性能的影响,获得各组分的最佳配比;测试了修补材料的抗紫外老化性能,并通过红外分析探讨了实验机理。研究结果表明,修补材料的初始黏度可达100～300mPa.s,固化时间在1h左右,与水泥胶砂试件的粘结强度达7.0MPa,自身抗拉强度超过30MPa,抗老化性能良好,能较好满足混凝土裂缝加固修补工程的需要。

Under the conditions of methyl methacrylate （MMA） as main agent, butyl methacrylate （BMA） as toughening agent and epoxy resin as modifying agent, it applies the orthogonal experiment design to prepare the high performance crylic materials for concrete crack curing in the system of Benzoyl peroxide and amine. It analyzes the effects of every single component of the crack-curing materials on initial viscosity, tensile strength, breaking elongation and bonding strength to achieve the optimal proportions. It tests the ultraviolet aging property of the crack-curing materials and then draws out the experimental mechanism based on infrared analysis. The investigation results present that the crack-curing materials meet the requirements of reinforcement of concrete since the initial viscosity is 100～300 mPa · s, the curing time is about 1 h, the bonding strength of mortar samples reaches to 7.0 MPa and the tensile strength is above 30 MPa, as well as the other properties are significantly improved.