综合以上可以得出，纳米材料对水泥的加速作用主要作用在水化前6小时，纳米

Based on the above it can be concluded acceleration nanomaterials major role cement hydration before 6 hours, the incorporation of nano materials capable of reducing early cement porosity, which is very important for the strength and durability of hardened specimen late meaning.

Synthesis of the above can be concluded that the accelerated effect of nanomaterials on cement mainly in the watering 6 hours before the mixing of nanomaterials can reduce the early porosity of cement stone, which is very important for the strength and durability of the late hardening test.

It can be concluded that the acceleration effect of nano materials on cement is mainly 6 hours before hydration, and the incorporation of nano materials can reduce the early porosity of cement paste, which is of great significance to the later strength and durability of hardened specimens.<br>