Analyzing the Effect of Rice Husk Ash & Quartz Powder on Mechanical Properties of Polypropylene Fiber Based Concrete Using Regression Analysis

Abstract

Several works were identified with sustainable development have uplifted the improvement of composite binders incorporating Portland cement, industrial, agricultural by- products and partial substitutions to aggregates. One of the most adverse effects of using cement is the emission of CO₂ into atmosphere during production and it can be reduced with the effective use of cementitious materials. Several efforts were attempted to make use of supplementary cementitious materials to enhance the behavior of concreter. Rice husk ash, Flyash GGBS, silica fume is such materials. The focus of this project is to analyze the effect of Rice husk ash, Quartz powder and polypropylene fibers on mechanical properties of M35 grade concrete. Rice husk ash is a byproduct of agricultural waste and highly amorphous form of silica. Quartz powder is generally composed of silicon dioxide. Initially the optimum percentage of polypropylene fiber reinforced concrete examined and it found 0.9% gave the maximum values of strength and used constantly in rest of the work. The percentage of rice husk ash and quartz powder started at 0% and 25% with constant 0.9% of polypropylene fibers, with slight increment of rice husk ash by 2.5% and at the same time decrement of quartz powder by 2.5% up to 25%rice husk ash and 0% quartz powder. Incorporating these pozzolonic materials resulted lower workability results and growth of water demand. From the results it was identified that 10%rice husk ash, 15% quartz powder and 0.9% polypropylene fibers were optimum levels in terms of mechanical properties of concrete. Regression analysis is used for establishing the linear relationships between the proportions of materials and strength of concrete. The developed relationships with various inputs can used to predict the strength of concrete based on the results of analysis.