Author(s): Sahil, Sumesh Jain and NP Kaushik

Abstract: Concrete is the most widely used construction material worldwide, yet its heavy dependence on cement production poses serious environmental challenges due to the high release of carbon dioxide and depletion of natural resources. The work aims to identify an optimum replacement level that achieves maximum strength and serviceability while minimizing environmental impact. This study uses an unfired compressed dirt block stabilised by solid waste as the test subject. Experimental investigations were conducted by partially substituting cement with RHA at varying proportions ranging from 0% to 30%. Concrete specimens were tested for workability, compressive strength, split tensile strength, and flexural strength at different curing ages (7, 14, and 28 days), along with durability parameters such as water absorption, rapid chloride penetration, and resistance to chemical attack. The results demonstrated that incorporating RHA up to 15% significantly enhanced compressive and flexural strength, refined pore structure, and improved durability due to the pozzolanic reaction forming additional calcium silicate hydrate (C-S-H) gel. The mechanical properties of a block containing R-h ash are also increased.

DOI: 10.22271/27078264.2025.v6.i2a.91

Pages: 17-23 | Views: 36 | Downloads: 14

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