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<p>Self-compacting concrete (SCC) has gained global recognition over the past three decades for its superior workability and durability. This study investigates the potential of partially replacing cement with bentonite, a naturally occurring pozzolanic material sourced from the Jehangira deposits in Pakistan, to develop environmentally sustainable self-compacting concrete (SCC). A comprehensive experimental program was conducted to evaluate the fresh and hardened properties of bentonite-modified SCC. Key performance parameters, including filling ability, passing ability, compressive strength, water absorption, and acid resistance, were systematically assessed at multiple curing ages in accordance with ASTM and EFNARC standards. The results indicate that the incorporation of bentonite significantly influences both the rheological and mechanical characteristics of SCC. Notably, SCC containing up to 18% bentonite demonstrated enhanced resistance to acid attack and exhibited a more pronounced post-peak softening behavior compared to conventional SCC. However, higher bentonite replacement levels adversely affected workability and strength. These findings contribute to a deeper understanding of the material behaviour of bentonite-based SCC and support its viability for durable, eco-efficient concrete applications.</p>

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Enhancing mechanical and durability properties of bentonite-modified self-compacting concrete

  • 期刊论文

  • 发表日期：

    2025年10月10日

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  • Khawaja Adeel Tariq,
  • Aashir Waleed,
  • Jamil Ahmad,
  • Fahad Ali,
  • Naveed Ahmad,
  • Muhammad Danish Nisar

摘要

Self-compacting concrete (SCC) has gained global recognition over the past three decades for its superior workability and durability. This study investigates the potential of partially replacing cement with bentonite, a naturally occurring pozzolanic material sourced from the Jehangira deposits in Pakistan, to develop environmentally sustainable self-compacting concrete (SCC). A comprehensive experimental program was conducted to evaluate the fresh and hardened properties of bentonite-modified SCC. Key performance parameters, including filling ability, passing ability, compressive strength, water absorption, and acid resistance, were systematically assessed at multiple curing ages in accordance with ASTM and EFNARC standards. The results indicate that the incorporation of bentonite significantly influences both the rheological and mechanical characteristics of SCC. Notably, SCC containing up to 18% bentonite demonstrated enhanced resistance to acid attack and exhibited a more pronounced post-peak softening behavior compared to conventional SCC. However, higher bentonite replacement levels adversely affected workability and strength. These findings contribute to a deeper understanding of the material behaviour of bentonite-based SCC and support its viability for durable, eco-efficient concrete applications.