Experimental investigation on properties of concrete with rice husk ash and water hyacinth ash

Abstract

The purpose of this experimental investigation is to study the properties of concrete with Ricehusk ash (RHA) and Water hyacintha ash (WHA) when used as a partial replacement for cement. Ricehusk ash is a by- product of thermally treating rice husks. It is highly pozzolanic and has been used as a partial replacement for cement in concrete production and Water hyacinth grows vigorously in ponds and doubles the quantity within two weeks. The studies have been done to evaluate water hyacinth ash in the replacement of cement. This study seeks to determine the effect of RHA and WHA on the strength and other properties of concrete. To conduct this investigation, a series of concrete mixtures were prepared with various percentages of RHA (5%, 10%, 15%, and 20%) for finding the optimum percentage. To the optimum concrete made with rice husk ash different percentage of cement is replaced with water hyacinth ash (5%,10%,15%,20%) and the optimum is obtained. The mix proportions were determined according to the standards. The mixtures were then tested to determine the compressive strength and flexural strength of the concrete. The results of the investigation showed that the replacement of cement by RHA enhanced the strength properties of concrete in 15% replacement of cement with RHA shows the maximum compressive strength value. The replacement of cement by WHA 10% with optimum RHA 15% enhanced the strength properties of concrete. Replacement of cement by 10% WHA with optimum RHA shows the maximum compressive and tensile value.