Application of nano scale stone powder and Grade III fly ash in high-performance concrete

Abstract

Nanostone powder is an ultrafine powder with hydroxyl group on the surface after characteristic treatment. In the field of cement concrete, nanometer stone powder can increase the strength and durability of concrete due to its strong volcanic ash activity, microaggregate filling effect and crystal core effect. This paper prepared high-performance concrete with nano-grade stone ash and third-grade fly ash, mainly studying the effect of nano-grade fly ash on its performance (working performance, compressive strength, etc.). Silicate cement slurry is divided into fresh cement slurry and hardened cement slurry. At the same time, fine admixture particles can relieve the flocculation structure formed in the process of cement hydration, which can effectively reduce the loss of concrete slump. (The results showed that the working and mechanical performance of nano-grade stone powder or third-grade fly ash.