Properties of Concrete Comprising of Fly Ash and Rice Husk Ash for Partial Substitution of Fine Aggregates

Increased population and technological advances have to lead to a rise in the amount of industrial and agricultural waste. Many scientists throughout the world are thus actively developing ways to eliminate these wastes or utilize them as a better alternative to added value resources. Among the few waste materials are rice husk ash (RHA) and fly ash (FA). The results of preliminary trials to examine the impact on compressive strength, split tensile strength, and flexural strength of a concrete incorporated with FA and RHA waste are discussed in this paper. The results showed that FA and RHA created mortar with better strength in low substitution levels as partial substitutes for cement at a percentage of 0, 10, 20, and 30 percent. Low substitution levels up to 22.5% FA and 7.5% RHA were determined to be an ideal blend for the best usage of RHA and fly ash in 56 days of curing. Thus the employment of the OPC, RHA, and FA mixture enhances the strength qualities of concrete created in this way quite well.