Rice Husk Ash Concrete: Study with Experimental and Theoretical result of Compressive Strength and Other Characteristics

Abstract

This book presents a study on the development of the physical properties of Portland cement by using rice husk ash (RHA) as a supplementary material instead of cement, where RHA from the local paddy milling industry in Bangladesh was used. The study was directed after a specific curing period of 7 days on models with two different replacement percentages of RHA, 5% and 10%. The experimental results of these models were compared with the model containing 0% rice husk ash. Total three cylinders were constructed following the dimension of 100mm radius and 200mm length for each cylinder. In the UTM machine, the experiment was induced to find tensile strength, elongation, Young’s modulus, and failure point. The burning process of rice husk was conducted following the village burning process. It is concluded that residual RHA has a positive impact on compressive strength at an early age, but more relevant was the long-term action of RHA concretes formed by regulated incineration. Comparing the simulated and experimental results, the yield strength and the crack patterns came out almost similar to the ideal one for both the models containing 5% and 10% RHA. Results of yield strengths and comparisons between the crack patterns indicate the significance of using the residual RHA as a replacement of some percentage of cement in the concrete.