Corn cob ash as sustainable puzzolanic material for an ecological concrete

Abstract

The present research aimed to reveal the effects of 5%, 10%, and 15% volume replacement of cement by corn cob ash (CCA) on the concrete density, compressive strength, and flexural and splitting tensile strengths. According to the experimental results, CCA decreased the values for compressive and tensile strength of the concrete, but it improved its density. There can be mentioned that, in spite of the negative effect on the mechanical properties of the concrete, an economy of 5% of cement led to a concrete appropriate to be used in building lighter structures with around 6%, an important gain from the point of view of seismic building behavior.