An Experimental Investigation of Untreated and Treated Corncob Ash Concrete

Cement is used for most of the construction work in the world. The consumption of cement needs to be reduced. Cement can be replaced with additional cementitious materials such as agricultural and industrial wastes such as fly ash, GGBS, Corncob Ash, Wheat straw Ash, etc., to reduce cost of construction. In this present study, Corncob Ash (CCA) is used as replacement for cement at various percentages. Compressive Strength of M20 grade concrete is tested for various percentages of Untreated CCA and Treated CCA of 5, 10, 15 and 20% by weight of cement is replaced and the results are compared with the conventional concrete. Test results obtained at 28 days show that treated corncob ash replacement at 5–10% of replacement has better compressive strength compared to untreated corncob ash and conventional concrete. The optimum strength value of 29.74 MPa occurs at 10% replacement of treated CCA. The use of treated corncob ash in concrete proves to be economical compared to conventional concrete.