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<p>This study examines the fresh and hardened properties of self-compacting concrete (SCC) using red mud (RM) as cement replacement (0, 5, 10, 15, and 20%), 100% manufactured sand (M-sand) as fine aggregate, and glass fiber (GF) reinforcement (0.5, 1.0, and 1.5%). A total of 180 mixes were tested for slump flow, L-box flowability, compressive, split tensile, and flexural strengths at 7, 14, and 28&#xa0;days of curing. The optimal C5 mix (20% RM replacement, 1.0% GF reinforcement) achieved exceptional compressive strengths of 28.5&#xa0;MPa at 7&#xa0;days, 34&#xa0;MPa at 14&#xa0;days, and 38.5&#xa0;MPa at 28&#xa0;days, representing an 89.6% improvement over the C1 control sample. This performance, combined with an 8% reduced L-box value confirming outstanding passing ability and flowability, validates sustainable SCC production using red mud, M-sand, and glass fiber without compromising mechanical properties.</p>

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Microstructural and Performance Assessment of Sustainable Self-compacting Concrete Integrating Glass Fiber and Red Mud as Environmentally Sustainable Cement Substitutes

  • 期刊论文

  • 发表日期：

    2026年4月29日

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  • J. Parthiban,
  • T. Felixkala

摘要

This study examines the fresh and hardened properties of self-compacting concrete (SCC) using red mud (RM) as cement replacement (0, 5, 10, 15, and 20%), 100% manufactured sand (M-sand) as fine aggregate, and glass fiber (GF) reinforcement (0.5, 1.0, and 1.5%). A total of 180 mixes were tested for slump flow, L-box flowability, compressive, split tensile, and flexural strengths at 7, 14, and 28 days of curing. The optimal C5 mix (20% RM replacement, 1.0% GF reinforcement) achieved exceptional compressive strengths of 28.5 MPa at 7 days, 34 MPa at 14 days, and 38.5 MPa at 28 days, representing an 89.6% improvement over the C1 control sample. This performance, combined with an 8% reduced L-box value confirming outstanding passing ability and flowability, validates sustainable SCC production using red mud, M-sand, and glass fiber without compromising mechanical properties.