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<p>This study resolves fundamental contradictions in granite powder concrete research through systematic moisture correction protocols and Taguchi optimization methodology. Previous studies reported conflicting results—strength improvements versus deterioration at identical replacement levels—because they failed to account for granite powder’s water absorption characteristics. This investigation establishes that granite powder must achieve saturated surface dry (SSD) condition for predictable performance. A Taguchi L27 orthogonal array examined five factors: water-to-binder ratio (0.40–0.60), fly ash replacement (10–30%), microsilica dosage (2–4%), granite powder replacement (10–30%), and moisture correction levels (0–10%). Six response variables were analyzed: compressive, flexural, and split tensile strengths, plus slump, T500, and V-funnel time. ANOVA revealed moisture correction as the dominant workability factor (58.85% contribution, <i>p</i> &lt; 0.001). Water-to-binder ratio controlled strength properties (84.65% contribution, <i>p</i> &lt; 0.001). Remarkably, granite powder percentage contributed only 0.42% to compressive strength variation when proper moisture correction was applied—the first study to statistically isolate this relationship. Three optimized mixes were validated: Maximum Strength (53.2&#xa0;MPa, 10% granite powder), Balanced Performance (41.2&#xa0;MPa, 20% granite powder), and Maximum Sustainability (39.1&#xa0;MPa, 30% granite powder). All achieved 93.7–97.1% prediction accuracy. The moisture correction methodology eliminated chemical admixture requirements entirely. Environmental benefits include 45–89&#xa0;kg CO<sub>2</sub>/m<sup>3</sup> emission reduction and 28–84&#xa0;L/m<sup>3</sup> water conservation. While developed using granite waste from Indian sources, the systematic moisture determination protocol (0–10% incremental testing) provides a transferable framework for optimizing any granite powder source globally. This breakthrough establishes granite powder concrete as technically viable and environmentally beneficial, resolving historical contradictions through scientifically validated moisture management protocols.</p>

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Sustainable Granite Powder Concrete Development Through Taguchi-Based Multi-response Optimization: A Moisture Correction Framework for Enhanced Performance

  • 期刊论文

  • 发表日期：

    2025年7月16日

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  • Sphurty Raman,
  • Raman Nateriya

摘要

This study resolves fundamental contradictions in granite powder concrete research through systematic moisture correction protocols and Taguchi optimization methodology. Previous studies reported conflicting results—strength improvements versus deterioration at identical replacement levels—because they failed to account for granite powder’s water absorption characteristics. This investigation establishes that granite powder must achieve saturated surface dry (SSD) condition for predictable performance. A Taguchi L27 orthogonal array examined five factors: water-to-binder ratio (0.40–0.60), fly ash replacement (10–30%), microsilica dosage (2–4%), granite powder replacement (10–30%), and moisture correction levels (0–10%). Six response variables were analyzed: compressive, flexural, and split tensile strengths, plus slump, T500, and V-funnel time. ANOVA revealed moisture correction as the dominant workability factor (58.85% contribution, p < 0.001). Water-to-binder ratio controlled strength properties (84.65% contribution, p < 0.001). Remarkably, granite powder percentage contributed only 0.42% to compressive strength variation when proper moisture correction was applied—the first study to statistically isolate this relationship. Three optimized mixes were validated: Maximum Strength (53.2 MPa, 10% granite powder), Balanced Performance (41.2 MPa, 20% granite powder), and Maximum Sustainability (39.1 MPa, 30% granite powder). All achieved 93.7–97.1% prediction accuracy. The moisture correction methodology eliminated chemical admixture requirements entirely. Environmental benefits include 45–89 kg CO2/m3 emission reduction and 28–84 L/m3 water conservation. While developed using granite waste from Indian sources, the systematic moisture determination protocol (0–10% incremental testing) provides a transferable framework for optimizing any granite powder source globally. This breakthrough establishes granite powder concrete as technically viable and environmentally beneficial, resolving historical contradictions through scientifically validated moisture management protocols.