Strength performance of high-grade concrete using rice husk ash (RHA) as cement replacement material

Abstract

Rice husk are agricultural waste acquired through the rice remedy method, whilst rice husk is about 22% of the weight of rice. The waste is used as a gas in leaching steps to produce streams.25% of the size of husk is turned into particles acknowledged as rice husk waste (RHA), which is another waste. The physical and chemical characteristics of rice husk ash (RHA) are analyzed, as well as the strength of composite concrete containing the same ash. The properties of the fresh concrete were compressive, split tensile and flexural strengths including workability, flow, setting times. Notwithstanding consequences for the qualities by RHA and the water concrete proportion, the properties of RHA concrete were likewise differentiated and those of Portland cement concrete have control over and silica concrete.The test results show that RHA is highly pozzolonic at 5%,7.5%,10%,12.5% and15% and can be used in the production of high performance cement as an additional cementing material. Although the super plasticizer and the air work training admixture require a higher dose than control concrete and silica fume concrete, a satisfactory slump, air content and set time can be used in the production of RHA concrete. Compared to the control concrete, the compressive strength of RHA concrete was higher in various ages up to 7 days and 28 days.