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

Abstract

Various challenges encountered in the construction industry have led to the production of concrete, with not just high strength, but also with enhanced durability properties. This study investigates the performance and durability 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. The durability performance of the high strength concrete, in terms of water permeability, sulfates resistance, chloride resistance and freeze-thawing tests were tested. 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 Nano-silica has a great influence on concrete properties, but the high dosage show a reverse result.