Partial Replacement Of Coarse Aggregate With Utilization Of Coal Wash Rejectors: A Sustainable Approach To Concrete Production

Abstract

This study investigates the feasibility of partially replacing coarse aggregate with coal wash rejects in concrete production. Coal wash rejects are a waste material generated during coal washing processes, and their disposal poses environmental concerns. The results show that partial replacement of coarse aggregate with coal wash rejects up to 20% can produce concrete with satisfactory mechanical properties, reduced density, and lower environmental impact. This research explores the feasibility of using coal wash rejectors as a partial replacement for coarse aggregate in concrete. Coal wash rejectors, a by-product of the coal mining industry, pose significant environmental challenges due to their disposal. This study evaluates the impact of incorporating coal wash rejectors on the mechanical properties of concrete, including compressive strength, tensile strength, and workability. The results indicate that coal wash rejectors can be used effectively as a partial substitute for coarse aggregates without significantly compromising the structural integrity of the concrete.[1] The interest of regular totals is quickly turning out to be high step by step in the development industry. Different endeavors are being made to track down substitutes for normal totals.

The combustion of high-quality coal accounts for approximately 70% of the electricity produced in India. During the time spent coal washing, huge amounts of debased coal are being dismissed and causing removal issues. These dismissed debased coals are called as Coal Washery Rejects (CWR). The current study attempts to use the novel material CWR as a partial replacement for coarse aggregate in concrete in order to preserve environmental sustainability. This examination concentrated on the compressive strength of cement containing CWR at various substitution levels (0% - half). The compressive strength values were contrasted with M 25grade of customary cement (CC). From the outcomes, it is seen that the expansion in CWR substitution level diminished the compressive strength. At replacement levels of 20 percent and 30 percent, this decrease was only marginal, but after 30 percent, it was extremely significant. Consequently, it is uncovered that 30% CWR substitution can be viewed as ideal level in the development industry.