Performance Of Concrete With Partial Replacement Of Sand By Dry Sewage Sludge

Abstract

In many countries, sludge is a serious problem due to its high treatment costs and the risks to environment and human health. The disposal of sludge is more tedious and it provides various difficulties, hence it is necessary to find out alternative disposal method. The study investigated the use of sewage treatment sludge incorporated with fine aggregate in concrete. The purpose of this study is to find an alternate source for fine aggregate. Since the river sand is found to be in limited availability and its cost is also high. In this study the concrete were produced by partially replacing the fine aggregate with dry sludge to the proportions of 20%, 25%, 30% by dry weight and compared with regular concrete. Natural fibres are added to improve the concrete strength. The concrete cubes, cylinders and beams were casted. The compression, tensile and flexural strength were taken at the end of 7 and 28 days. The results shows that concrete exhibits better strength upto 25% replacement of fine aggregates by dry sludge.