Study on M20 and M60 grade concrete using rice husk ash and waste

Abstract

Rice husk ash (RHA) is derived from Rice Husks, which is usually regarded as agricultural waste. Waste granite powder is derived from granite crushing industries. This paper incorporates the results from the experimental work attempted to assess the appropriateness of rice husk ash to be utilised as the partial substitutes for cement in both normal and high strength concrete accommodating waste granite powder as a partial substitute to fine aggregate. Normal grade of M20 and HSC mix of M60 are designed to attain 20 MPa and 60 MPa at 28 days including and  excluding of rice husk ash. Waste granite powder is then replaced in the mixes with varying percentages ranging from 0% to 50%. The compressive strength, flexural strength, and mechanical properties development are monitored for 28 days and the tests are conducted. Depending on the results, the mixes containing 25% RHA of concrete in terms of
compressive strength and mixes containing 25% RHA replacement and 40% waste granite powder replacement is preferred in terms of flexural strength. These findings assert that waste granite powder along with Rice husk ash can be replaced together partially in place of sand and cement. Durability tests are also conducted to assess the chemical attack which stems in the deterioration of concrete.