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研究了磨碎玻璃纤维(MG)和轻质碳酸钙(LC)2种填料及二甲苯稀释剂对环氧树脂砂浆(EM)流动性和力学性能的影响。结果表明,MG和LC对EM的强度均有提高作用,但会导致EM流动性降低;稀释剂可有效改善EM的流动度,但会降低树脂的固化速度,并导致EM的强度降低。SEM分析表明,LC的加入提高了砂浆体系的密实度,阻碍裂纹扩展;MG纤维均匀分散在砂浆体系中,纤维的断裂和拔出吸收大量的能量,可有效分担树脂基体传递的应力。
The effects of two kinds of filler, such as ground glass fiber (MG) and light calcium carbonate (LC), and xylene diluent on the fluidity and mechanical properties of epoxy resin mortar (EM) were studied. The results showed that both MG and LC enhanced the EM strength but decreased the flowability of EM. Thinner could effectively improve the fluidity of EM, but decreased the curing speed of resin and decreased the strength of EM. SEM analysis shows that the addition of LC improves the compactness of the mortar system and hinders the crack propagation. The MG fibers are uniformly dispersed in the mortar system. The fracture and pull-out of the fibers absorb a large amount of energy and can effectively share the stress transmitted by the resin matrix.