The aim of this research is to study the effect of using potable water treatment sludge ash (PWTS) on some mechanical properties of self-compacting concrete (SCC), namely, compressive strength, density, porosity, ultra-sonic pulse velocity and Schmidt hummer readings. PWTS was used as partial replacement of 5, 10 and 15% by weight of cement. Same quantities were used as partial replacement with 30% fly ash (class C) to produce different mixes. In this research, super-plasticizers were used to achieve the required slump of concrete. A comparison was made between the test results of the different types of concretes. Results of this research revealed that, in case of partial replacement of cement, 5% and 10% has a different positive effect on different mechanical properties than 15%. Similar conclusion has been reached at in case of using WTS as partial replacement of cement no/with 30% fly ash. Effect of potable WTS inclusion on slump flow, V-funnel and L-box in concrete has been also studied and presented.
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