Experimental And Statistical Analysis On Mechanical Properties Of Rice Husk Ash Concrete

Abstract

Concrete technology has advanced tremendously in civil engineering over the last few decades. Concrete is now an engineered substance with many additional ingredients that perform well under specific conditions. In recent years, strict environmental policies have increased byproducts and industrial waste, some of which are natural cementation materials. Rice husk is the byproduct of Rice from the Agricultural industry. Incineration of rice husk produces Ash. This ash is termed Rice Husk Ash and abbreviated as RHA. This RHA encloses about 80 - 90 percent silica (SiO2). Silica in RHA is involved in the process of cement hydration. The Present Research work is divided into two parts. The first part determines the Mechanical Properties (Compression, Split Tensile, and flexural Strength) of M30 and M60 grades of concrete in which cement is substituted partially with Rice husk ash in 0%, 5%, 10%, 15%, and 20% by weight and exposed to 1%, 3%, and 5% concentrations of MgSO4, Na2SO4, H2SO4, and HCL solutions for 30, 60, and 90 days. The second part of the work is to apply the analysis of variance method (ANOVA) on Experimental data to determine the effect of factors such as Period of curing, Percentage of Admixture, and Concentration of Solution on mechanical properties of M30 RHA and M60 RHA concrete. The results of the tests show that RHA is a pozzolanic ingredient. Compared to concrete mixes without RHA, the Sulphate and Acid resistances of M30 and M60 RHA mixes were higher. A decrease in slump was observed in M30 RHA and M60 RHA Mixes. The optimum cement replacement of RHA in M30 RHA and M60 RHA grades of blends was 10% to achieve maximum (Compressive, Split Tensile, and Flexural) strength. According to statistical analysis, the period of curing impacts the overall performance of (Compressive, Split Tensile, and Flexural) strength in M30 RHA Concrete. In M60 RHA concrete, the amount of rice husk ash plays a significant role in determining the overall strength of the concrete when it comes into contact with sulfate sol