Experimental Inventigation On Partial Replacement Of Cement With Fly Ash In Concrete Mix Design

Abstract

The potential of fly ash as a substitute for cement in the concrete industry has been explored since the early 19th century. Researchers have investigated the compressive strength of concrete by replacing varying proportions of cement with fly ash. However, the optimal amount of fly ash to be used depends on factors such as its properties, application methods, geographic location, and climatic conditions. Numerous studies have examined the use of fly ash as an additive in cement, admixture, and concrete, as well as its potential as a cement replacement material. Most of these studies focused on replacing small percentages of cement in lower-grade concretes. This study aims to investigate the effects of fly ash on the compressive strength of high-grade concretes, considering different curing periods and quantities of fly ash. The research also explores the impact of fly ash on the mechanical properties of fresh and hardened concrete by mixing different grades of concrete with varying percentages of fly ash. The compressive strength of concrete was measured at 7, 28, and 60 days, and the compaction factor was determined from workability measurements. A comparative study was conducted, considering different rates and strengths as parameters. By partially replacing cement with fly ash, the compressive strength of concrete was evaluated, and the results were found to be effective and applicable. This study provides a comprehensive analysis of the effects of fly ash as a partial replacement for cement in concrete, aiming to determine the optimal quantity of fly ash for different concrete qualities that is acceptable, applicable, and economical. The study also explains the variations in compressive strength of different concrete qualities at various percentages of fly ash and curing periods.