关键词: 弹性环氧砂浆, 水工建筑物, 抗冲磨性能, 电镜扫描, 工程应用

Abstract: Epoxy mortar coating protection is an effective approach to enhance the abrasion resistance of hydraulic structures. In order to improve the anti-abrasion properties of ordinary epoxy mortar, we prepared CW elastic epoxy mortar by using highly flexible epoxy resin, low-heat curing agent, graded filler and other raw materials. We compared the mechanical properties between elastic epoxy mortar and other epoxy mortars, then analyzed the structural characteristic of elastic epoxy mortar using SEM, and gave some engineering application examples. Results demonstrated that after grinding for 72 hours, the abrasion of CW elastic epoxy mortar is 40.5% lower than that of ordinary epoxy mortar, 38.4% lower than that of modified epoxy mortar, and the anti-abrasion strength is 72.4% higher than that of modified epoxy mortar; after grinding for 216 hours, the mass loss rate is only 0.08%, and the anti-abrasion strength at the age of 216 h reaches 82.05 h/(kg/m²), far greater than that of ordinary epoxy mortar. The coating is relatively smooth and flat before impact grinding, and the structure deforms after impact grinding, with folds and a few pits; but the whole is still closely combined, presenting a relatively complete continuous phase, which indicates that CW elastic epoxy mortar has good anti-abrasion property and well resists membrane destruction. Since CW elastic epoxy mortar has excellent performance in the anti-abrasion protection of buildings with large flow and high head, such as absorption basin and plunge pool, it is of great application prospect.

Key words: elastic epoxy mortar, hydraulic structure, anti-abrasion property, scanning electron microscope, engineering application