Experimental investigation on effect of micro silica on high-strength concrete

Concrete is the most widely used building material in construction industry. Now-a-days various types of admixture are used to improve different properties of concrete. These admixtures are waste products of different manufacturing industries, which also helps to decrease material cost. Along with mechanical properties, environmental properties of concrete can be improved with efficient use of mineral and chemical admixture. The following research investigates effect of microsilica on high-strength concrete. The cement content in the concrete was replaced by Microsilica in varying percentages. Different specimens of standard sizes were tested to check compressive, tensile and flexural strength of concrete. To check environmental property of high-strength concrete, water permeability test was carried on cube specimens. It was concluded that, use of micro silica increases strength of concrete for small amount of replacements to cement. With more increase in content of microsilica, the strength of concrete decreases. Along with strength permeability of concrete was also improved.