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The disposal of waste foundry sand (WFS) poses environmental challenges, necessitating sustainable bioengineering solutions. This study investigates WFS as a stabilizer for black cotton soil (BCS) to enhance its geotechnical properties for construction. BCS mixed with 10%–40% WFS was evaluated through Atterberg limits, compaction, unconfined compressive strength (UCS), and California bearing ratio (CBR) tests. The optimal 20% WFS reduced the liquid limit by 17.18%, decreased plasticity by 28%, and improved UCS by 157.45%. CBR values increased significantly, highlighting WFS’s potential in bioengineering applications for sustainable soil stabilization and environmental conservation.
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Kumar et al. (2025) studied this question.
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