Study on Effects of Fly Ash and Quarry Dust On Partial Replacement Of Cement and Fine Aggregate

Abstract

This research study presents the strength variations of concrete when replacing fine aggregate and cement by quarry dust and fly ash respectively. In this study addition of fine aggregate and cement adapted with 0%, 20%, 30%, 40% and 50%. For this study, M25 and M60 grade of concretes are used, because to accommodate the lower and higher strength in this research. The experimental investigations of compressive strength of concrete cubes added with fly ash at the age of 7, 14, 28 and 90 days were conducted at room temperature. The Split tensile strength of fly ash added concrete cylinders were tested at the age of 14 and 28 days. The flexural strengths of the concrete beams were determined on the beams which cured at water for 28 days. The concrete specimens added with fly ash and quarry dust were cured using various chemical solutions to determine the loss of strength and loss of weight in concrete to ensure the durability of fly ash and quarry dust concrete against chemicals. The high performance concrete has been decided as M60 grade concrete and mix design was carriedout. Primarily this study observes the behavior and performance of high volume fly ash (HFA) and quarry dust (QD) concrete when the cement and fine aggregate have been replaced partially. The high performance reinforced concrete beams were tested and analyzed under cyclic loading conditions to determine the strength, residual strength and stiffness degradation. Also, in this study, the advanced chloride penetration method (RCPT) was conducted for the fly ash and quarry dust mixed concrete. In concluding section, the structural properties like compressive strength, split tensile strength and flexural strength of fly ash and quarry dust mixed concrete at the various percentage of replacements and chloride permeability were discussed. Results show that replacing quarry dust in concrete is a viable option for disposing. newline