Effect of pond ash and steel fibre on engineering properties of concrete

This paper presents an experimental study on engineering properties of pond ash-modified concrete reinforced by discrete steel fibres. Pond ash content was varied as 0%, 10%, 20% and 30% by weight of cement. Grooved steel fibres were varied as 0%, 0.5%, 1% and 2% by volume of concrete. Compressive strength, split tensile strength and flexural strength increased with increasing curing period for all fibre contents and pond ash contents. For a given fibre content, compressive strength decreased with increasing pond ash content. Split tensile strength did not show any marked change with increasing pond ash content for any fibre content. Flexural strength also increased with increasing fibre content for all pond ash contents. In general, the addition of steel fibres did not improve the values of modulus of elasticity. The effects of pond ash on modulus of elasticity were not as significant as those of pond ash on strength.