Experimental Study on Partial Replacement of Cement with Sewage Sludge Ash, Silica Fume and Marble Dust

In this project we use of incinerated sewage sludge ash (ISSA), marble dust and silica fume in the making of concrete structure with partial cement replacement. Sewage sludge was incinerated at 800ºC and collected from waste water treatment plant, marble dust was collected from construction building and silica fume was collected during silicon and ferrosilicon alloy production. In this project our main objective is to study the influence of partial replacement of cement with sewage sludge ash, marble dust and silica fume and to compare it with the compressive strength of M25 concrete. We are also trying to find the percentage of sewage sludge ash, marble powder, silica fume replaced in concrete that makes the strength of the concrete maximum. Now a day’s sewage sludge, marble powder has become a pollutant. So, by partially replacing cement with sewage slude ash, marble powder, we are proposing a method that can be of great use in reducing pollution to a great extent. In this investigation a series of compression tests were conducted on 150mm, cube and 150mm x 300mm, cylindrical specimens using a modified test method that gave the complete compressive strength, using sewage sludge ash, silica fume and marble of 10%, 20%, 30% and 40% on Pozolana Portland cement concrete.