Examination of Cement Concrete Mixed with Sewage Sludge Ash

A by-product of wastewater treatment sludge incineration, commonly known as Sewage Sludge Ash (SSA) is a waste material often seen going to landfills. Its usage as a construction material has been studied by various literatures where the material’s beneficial effects was identified. Proper recycling of the material by integrating it into cement concrete mix will not only reduce the cost, but also increase its sustainability. This study seeks to examine the effects of substituting a portion of the fine aggregate with SSA at different percentages (5%, 10%, 15%, 20%). Specifically, its influence on the strength, durability, and workability of the concrete mix. The mixes and well as the control samples will be tested at different curing period (7, 14, and 28 days) in order to better understand the strength. An attempt will be made to determine the optimum SSA percentage to replace fine aggregate that will yield maximum strength and reasonable workability. It is expected that the modified cement concrete mix with SSA will have the same or higher strength and workability than control cement concrete mix. It is also expected that there will be correlations of strength with resistivity