LAUSR

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.