Microsilica concrete is widely used in industrial structures exposed to an array of chemicals aggressive. In the alimentary industry the exposure comes from fat acids and other acids, detergents, etc. In the chemical industry there is exposure from mineral acids, phosphates, nitrates, petrochemicals, etc.Microsilica concrete is therefore in valuable in the industrial and agricultural sector
1. Cement replacement up to 10% with silica fume leads to increase in compressive strength, for M30grade of concrete. From 15% there is a decrease in compressive strength for 3, 7, 14 and 28 days curing period.
2 .It was observed that the compressive strength ofM30 grade of concrete is increased from 16.15% to29.24% and decrease from 23.98% to 20.22%.
3. The maximum replacement level of silica fume is10% for M30 grade of concrete.
4. The use of micro silica in high strength concrete leads to economical and faster construction.
5.Due to use of the micro silica in a OPC concrete the life of that concrete is increase 4-5 times than the OPC concrete.