A Study on the high Strength Mortar using Silica Fume and Fly Ash

실리카 흄과 플라이 애쉬를 이용한 고강도 모르타르에 관한 연구

The purpose of this study is to evaluate the effect of substitution of silica fume and fly ash to the mortar mixed with 1:1 of cement/sand ratio on the physical properties. The changes of physical properties were observed through compressive strength, XRD, SEM, and porosity. As result, the compressive strength was excellent when silica fume was replaced with cement in the range of 10%. But the substituion of fly ash was not affect with improvement of compressive strength. Especially , the compressive strength showed the maximum value with 1047kg/$\textrm{cm}^2$ for the substitution of silica fume and fly ash of 10% and 5%, respectively.