An Experimental Investigation On Strength Characteristics Of Concrete With The Partial Replacement Of Fine Aggregate By Coal Bottom Ash

Abstract

The natural resources of the sand are becoming depleted gradually. Mining of sand leads to various environmental hazards. The demand for the protection of the natural environment and the ban on mining in some areas is further making a problem (aggravating) to river sand. Using a partial replacement of sand by coal bottom ash, the work is assisted to developing a better understanding on strength characteristics of concrete. Bottom ash is a byproduct of burning of pulverized coal. It is also one of the major solid wastes coming from power plant or thermal power plants industries; it is composed mainly of silica, alumina, calcium, magnesium sulphate and iron. The paper presents the experimental investigation administered to review the effect of use of coal bottom ash as a partial replacement of fine aggregate. An experimental program is planned in which controlled concrete grade M30 is used. Fine aggregate is replaces with bottom ash by 0%, 10%, 20%, 30%, 40% and evaluating its Compressive strength, Split tensile strength, Flexural strength. Test results show that bottom ash is often used as an efficient replacement of fine aggregates. Workability decreases with the rise of bottom ash content. The compressive strength, tensile strength, flexural strength was effective up to 30% replacement level. Therefore 30% of the fine aggregates maybe replaced with Coal bottom ash effectively.