High performance concrete incorporating fly ash, nano-silica (nano-SiO2) and micro-silica (micro-SiO2)

Abstract

High performance concrete (HPC) exceeds the properties and constructability of normal concrete. Normal and special materials such as fly ash, micro silica and nano silica are used to make these specially designed concretes that must meet a combination of performance requirements. There are many good reasons to view fly ash, micro silica and nano silica as blended materials in concrete. In many cases, concrete made with fly ash, micro silica and nano silica performs better than concrete made without them. In this paper, an effort was made to evaluate the effect of nano-silica (nano-SiO2), micro-silica (micro-SiO2) and fly ash in improving the properties concrete. Firstly, compressive strength of concrete with different percentage of nano-silica (nano-SiO2), micro-silica (micro-SiO2) and fly ash was studied. Secondly, compressive strength of concrete with Ordinary Portland cement (OPC) and Portland fly ash cement (PPC) was studied. Thirdly, compressive strength of concrete with combination of fly ash and micro silica (micro-SiO2) was studied.