| Summary: | The utilization of industrial by products instead of the cementitious materials in concrete leads to sustainable environment and helps to reduce the environmental pollution. This part of the research concentrates on the performance evaluation of Saw Dust Ash (SDA) as a partial replacement for cement as well as the regression analysis among different parameters. It includes the setting time, fresh concrete properties and hardened concrete properties of the saw dust ash concrete. SDA was used by weight from 5% to 20% in steps of 5% to replace ordinary Portland cement. The fresh concrete properties indicate that the workability of SDA concrete decreases as the percentage replacement of SDA increases. The compressive strength, flexural and split tensile strength of the hardened concrete increases up to 10% of saw dust ash and then decreases. It is concluded that the optimum percentage to replace cement with saw dust ash is up to 10% for the reliable results. Further replacement would be detrimental to the strength of the concrete. The regression analyses to predict split tensile strength and flexural strength with respect to compressive strength shows very good correlation with regression coefficients of 0.979 and 0.911 respectively. The saw dust ash concrete was also found to be cheaper and friendlier to the environment than Portland cement concrete in the proportion to the percentage of cement replaced.
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