Investigation of Using Nano-silica, Silica Fume and Fly Ash in High Strength Concrete

Abstract

This study aims to investigate the performance of hardened high strength concrete cast using Nano-silica, silica fume and fly ash. Experiments were conducted by substituting cement by weight with Nano-silica, silica fume or fly ash with ratios of 5 %, 10% and 15% and compared to a control mix. This study generally proposes a sustainable solution to produce durable concrete that could have useful application in the construction industry. Based on the results obtained, the hardened properties of concrete improved depending on the type of supplementary cementious materials. Test results showed that adding the suggested types is effective to improve concrete strength. Adding Nano-silica has a great influence on concrete properties. Increasing the dosage over 5.0% affects badly on strength.

Effect of Iron Tailing Powder-Based Ternary Admixture on Acid Corrosion Resistance of Concrete

“…Roy et al [ 9 ] examined the effects of mortars prepared using silica fume, fly ash, and metakaolin, respectively, as SCMs in different acid corrosion environments and showed that the addition of silica fume, fly ash, and metakaolin, respectively, improved the acid erosion resistance of concrete. Nowadays, the application of SCMs [ 14 , 15 , 16 , 17 ] is effectively practiced, and the commonly used SCMs are mainly industrial solid wastes [ 18 , 19 , 20 , 21 ]. A series of research results have shown that the use of industrial solid wastes as SCMs can improve the performance of concrete, which is of great significance to save natural energy and protect the environment.…”