This paper studies the effects of hygrothermal environment at different temperatures and ultraviolet (UV) radiation on the bending properties of epoxy polymer mortar (EPM). The microstructure changes of EPM during aging were studied by scanning electron microscopy, and the bending properties of EPM were predicted by the Arrhenius law. The results showed that the bending properties of EPM were greatly affected by the temperature in the hygrothermal aging, but not evidently affected by ultraviolet radiation in UV aging. The prediction of Arrhenius model shows that the EPM will steadily retain 92.8%, 89.1% and 79.4% of the original flexural strength after long-term hygrothermal aging at \(40^{\circ }\)C, \(60^{\circ }\)C and \(80^{\circ }\)C, respectively.

本文研究了湿热环境在不同温度和紫外线（UV）辐射下对环氧聚合物砂浆（EPM）弯曲性能的影响。通过扫描电子显微镜研究了EPM在老化过程中的微观结构变化，并通过阿伦尼乌斯定律预测了EPM的弯曲性能。结果表明，在湿热老化过程中，EPM的弯曲性能受温度的影响很大，而在紫外线老化过程中，紫外辐射的影响不明显。Arrhenius模型的预测表明，在\（40 ^ {\ circ} \） C，\（60 ^ {\ circ} \） C和\（80 ^ {\ circ} \） C。