Comparative Study on the Effects of Five Nano-Metallic Oxide Particles on the Long-Term Mechanical Property and Durability of Cement Mortar

Nano-metallic oxide particles have been found to be potentially effective microstructural reinforcements for cement mortar and become a research hotspot in recent years nano-modification technology of building materials. However, different conclusions obtained due various researchers used methods, which resulted deficiency the performance comparison between nano-metallic particles. In present study, effects five kinds particles, namely nano-MgO, nano-Al2O3, nano-ZrO2, nano-CuO, nano-ZnO, on at 28 days 730 terms mechanical, durability, microstructure, pore size distribution properties by performing experiments were investigated. Test results show that dosage nano-ZnO is 2%, 1%, respectively, where they can significantly prove compressive flexural strengths, decrease porosity, drying shrinkage, permeability, refine mortar. It seen through SEM analysis promote hydration, also Ca(OH)2 crystal, but specific principles are different. The concluded play filling role cementitious materials improve denseness surface activity hydration thus improving mechanical properties, materials, with order their modification effect cement-based being nano-ZrO2 > nano-MgO nano-Al2O3 nano-CuO.