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The growing challenges associated with the disposal of industrial wastes have compelled engineers to explore their utilisation in the construction sector. In this context, this study aims to explore the suitability of brick kiln waste (BKW) treated with some percentage of cement as a substitute for natural soil in various geotechnical engineering applications. A comprehensive experimental programme was carried out in which ordinary Portland cement (2%, 4%, 6%, 8% and 10% by dry weight of BKW) was added to assess its impact on the geomechanical properties of BKW. Strength improvement was assessed through unconfined compressive strength (UCS), split tensile strength (STS), direct shear (DST) and California bearing ratio (CBR) tests on samples cured for 7, 14 and 28 days. The results revealed a significant enhancement in strength with cement addition and curing, with UCS reaching 1435 kPa at 8% cement, cohesion increasing from 14.6 to 62.7 kN/m 2, friction angle from 35.4 ∘ to 48.5 ∘ and CBR improving from 12.7% to 36.8% (unsoaked) and 7.1% to 23.4% (soaked). Microstructural analysis using XRD, FESEM and EDAX indicated morphological changes, reduction of voids and formation of a cohesive binding matrix. Thus, BKW utilisation not only addresses disposal issues but also provides a sustainable construction material.
Mirza et al. (Mon,) studied this question.