Utilization of silica fume and steel powder in concrete
Cement concrete are designed to resist the disastrous surrounding effects such as high temperature variations, high humid environments, coastal areas, industrial areas and other pollutant types. The major advantage of these materials is the replacement of cement or other ingredients. The use of waste material can consume these. This can also improves the properties of concrete in fresh and hydrated. In the current study a set of experiments had been performed to compare the use of 3 different types of mixes formed by replacing cement by silica fume, sand by steel powder and in third mix both the materials are used together for M25 grade of concrete. Cement and sand were replaced in different proportions such as 10%, 15%, 20%, 25%, and 30% by these materials. The ingredients are mixed in 1:1:2 proportions. The properties studied are 3 days, 21 days and 28 days compressive strengths and workability by compaction factor. The main conclusions drawn are inclusion of silica fume increases the compressive strength up-to a certain proportions and then reduces the strength, it also effects the setting time and consistency. Steel powder increases the strength but reduces the compaction factor. Comparatively higher early strength gain (3-days) is obtained with steel powder concrete.