Effect of Saw Dust Ash as a Partial Replacement of Cement on Fresh and Hardened Properties of Concrete

In this research work, the Saw Dust Ash (SDA) was used as a partial cement replacement material in concrete to reduce the use of cement in concrete manufacturing and to reduce the effect of CO2 in the atmosphere which creates environmental problems. The main objectives of this research study were to determine the fresh (workability) and hardened properties (compressive and splitting tensile) of concrete by using SDA at various percentages of 0%, 5%, 10%, 15% and 20% by the weight of cement. Total 75 concrete specimens (45 cubes and 30 cylinders) were cast for the targeted strength of 25 N/mm2. Cube specimens (100 x 100 x 100mm) were tested for the compressive strength at 7, 28 and 90 days, cylindrical specimens (200 x 100mm) were used for determining splitting tensile strength at 7, 28 and 90 days curing period. It was obtained that the compressive strength and tensile strength were increased with up to 10% replacement of SDA. The workability of fresh concrete was decreased with an increase in the percentages of SDA content. SDA was used in concrete to increase the strength of concrete.