Mechanical Characterization of Sustainable Concrete Incorporating Bentonite Powder and Sisal Fibre

Abstract

The production of cement releases huge amount of greenhouse emissions. Various alternative materials for cement replacement are suggested by the researchers. However, these materials are not available in all places. Hence, the exploration of substitute materials for cement remains a contemporary focal point in research. In this work, an endeavor has been taken to know the effect of bentonite as a substitute for cement on the behavior of concrete. Further, sisal fibers are added in this concrete to enhance the overall concrete characteristics. The concrete of the M30 grade is employed and the cement has been replaced with bentonite by weight of 0%, 10%, 20%, 30%, and 40%. The workability, strength, and durability for acid curing were assessed and compared to regular concrete. There is a 10.81%, 14.17%, and 12.02% enhancement in the compressive strength by the inclusion of 30% of bentonite as a replacement for cement. The inclusion of 30% bentonite as a replacement for cement exhibits optimum enhancement in strength and durability. Further, the inclusion of sisal fibers and bentonite enhances the tensile strength of the concrete. The test results suggest that the inclusion of bentonite as a substitute for cement increases the concrete characteristics.