摘要：Sulfate attack was one of the most important factors affecting the durability of cement slurry in mine corrosive environment. For water stopping and reinforcement projects in wellbore or working face under sulfate erosion environment, mineral admixtures were often used to improve the sulfate resistance of cement slurry. The physical and mechanical properties of cement mortar with 0, 4%, 8%, 12% and 16% UEA expansive agent content under the conditions of 0.6%, 3% and 15% sodium sulfate solution concentration were investigated through the full immersion test for 19 months in the laboratory. The results showed that the strength of mortar specimens decreased with the increase of UEA expansive agent content, but in the sulfate attack environment, the ability to resist sulfate attack could be significantly improved. In order to ensure the early strength of mortar and reduce the cost, the best effect of UEA expansion agent was 4%.
