Effect of Nano-MgO on the Durability of Cement-Based Materials

摘要

The autogenous shrinkage of cement-based materials is difficult to solve. Some studies have found that nano-magnesium oxide (MgO) can be used as an expansive agent to improve the shrinkage performance of cement-based materials. The basic research on nano-MgO in cement-based materials has appeared, but the research on the durability of cement-based materials by nano-MgO is very rare. In this article, nano-MgO was incorporated into cement mortar, and the experimental research studies effects of nano-MgO content on permeability resistance, crack resistance, sulfate corrosion resistance, and freeze-thaw resistance of cement mortar. The results show that nano-MgO can improve the durability of mortar. The mechanism of nano-MgO is discussed by this article in improving the durability of cement mortar, and it provides a theoretical basis for the further application of nano-MgO in cement-based materials.