Mining and Industrial Wastes in Sustainable Construction: A Synergistic Approach Using Fly Ash, Coal Bottom Ash, and Quarry Dust

This study presents a comprehensive investigation into the synergistic use of fly ash (FA), coal bottom ash (CBA), and quarry dust (QD) as partial replacements for conventional construction materials, aiming to mitigate environmental degradation while enhancing material performance. Individually and in combination, a series of concrete mixes were prepared incorporating these wastes at varying proportions, and were tested for workability, compressive strength, and durability (water absorption and chloride ion penetration). Results indicate that blends of FA, CBA, and QD can effectively substitute up to ۴۰% of cement and fine aggregates without compromising structural performance. The mixes containing ۲۰% fly ash, ۱۰% bottom ash, and ۱۰% quarry dust exhibited superior compressive, split tensile, and flexural strength, and reduced water absorption and chloride ion penetration, demonstrating their potential in aggressive environments.

کلیدواژه ها:

Fly Ash ، Coal bottom ash ، Quarry dust ، Sustainable construction ، Mining waste reuse