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<p>The increasing demand for concrete in the construction industry has significantly depleted natural resources, particularly cement and aggregates, leading to ecological degradation and increased carbon emissions. Addressing these challenges, this study investigates the potential of utilizing micro silica (MS) and ceramic tile waste (CTW) as partial replacements for cement and coarse aggregates, respectively, in OPC 43-grade concrete. The primary objective is to enhance concrete sustainability without compromising its mechanical performance. Concrete mixes were prepared with varying replacement levels: MS at 5% and 10%, and CTW at 20% and 40%. Standardized tests were conducted to evaluate compressive, split tensile, and flexural strengths at 7 and 28&#xa0;days. The highest strength performance was recorded in the mix with 5% MS and 20% CTW (S5C20), which showed improvements of 10.14% in compressive strength, 11.41% in split tensile strength, and 5.58% in flexural strength compared to the control mix. EDS analysis confirmed enhanced microstructural densification due to pozzolanic activity and mechanical interlock effects. To support experimental findings, optimization models were applied using Response Surface Methodology (RSM), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), and Fuzzy Logic, with RSM achieving the highest prediction accuracy (desirability score of 0.961). The study concludes that a combined substitution of 5% MS and 20% CTW yields the most balanced enhancement in strength and sustainability. Excessive replacement, especially at 40% CTW, results in marginal strength loss due to reduced workability and aggregate brittleness. This work highlights the dual benefit of waste valorization and structural reliability, promoting circular construction practices. Recommendations include long-term durability assessment, life cycle analysis, and pilot implementation in real construction projects to validate performance under field conditions.</p>

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Performance evaluation of OPC 43 concrete incorporating micro silica and recycled ceramic tile waste as partial cement and coarse aggregate replacements

  • 期刊论文

  • 发表日期：

    2025年8月15日

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  • Sourabh Dhiman,
  • Seema Seema,
  • Shalom Akhai

摘要

The increasing demand for concrete in the construction industry has significantly depleted natural resources, particularly cement and aggregates, leading to ecological degradation and increased carbon emissions. Addressing these challenges, this study investigates the potential of utilizing micro silica (MS) and ceramic tile waste (CTW) as partial replacements for cement and coarse aggregates, respectively, in OPC 43-grade concrete. The primary objective is to enhance concrete sustainability without compromising its mechanical performance. Concrete mixes were prepared with varying replacement levels: MS at 5% and 10%, and CTW at 20% and 40%. Standardized tests were conducted to evaluate compressive, split tensile, and flexural strengths at 7 and 28 days. The highest strength performance was recorded in the mix with 5% MS and 20% CTW (S5C20), which showed improvements of 10.14% in compressive strength, 11.41% in split tensile strength, and 5.58% in flexural strength compared to the control mix. EDS analysis confirmed enhanced microstructural densification due to pozzolanic activity and mechanical interlock effects. To support experimental findings, optimization models were applied using Response Surface Methodology (RSM), Technique for Order Preference by Similarity to Ideal Solution (TOPSIS), and Fuzzy Logic, with RSM achieving the highest prediction accuracy (desirability score of 0.961). The study concludes that a combined substitution of 5% MS and 20% CTW yields the most balanced enhancement in strength and sustainability. Excessive replacement, especially at 40% CTW, results in marginal strength loss due to reduced workability and aggregate brittleness. This work highlights the dual benefit of waste valorization and structural reliability, promoting circular construction practices. Recommendations include long-term durability assessment, life cycle analysis, and pilot implementation in real construction projects to validate performance under field conditions.