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<p>Concrete sustainability can be significantly enhanced through the combined utilization of industrial and agricultural by-products. This study investigates the performance of concrete incorporating sugarcane bagasse ash (SCBA) as a supplementary cementitious material and slag sand as a fine aggregate replacement, with particular emphasis on paver block applications. The pozzolanic reactivity of SCBA was confirmed through strength activity index (78% at 28 days), X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses. Concrete mixtures were prepared with varying SCBA (10–30%) and slag sand (0–100%) replacement levels. Results indicate that 50% slag sand replacement yielded optimal performance. The incorporation of 20% SCBA resulted in a compressive strength of 46.67&#xa0;MPa, compared to 38.84&#xa0;MPa for the control mix at 28 days, representing an increase of 20.17%. Durability performance improved significantly, with water sorptivity reduced from 8.90 to 7.53&#xa0;mm/h⁰·⁵ and water permeability reduced by 37.28% relative to the control mix. Microstructural analysis revealed enhanced matrix densification due to increased formation of calcium silicate hydrate (C–S–H) and reduced porosity. The results demonstrate that the combined use of 20% SCBA and 50% slag sand produces mechanically superior and durable concrete suitable for pavement applications.</p>

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Performance Optimization of Slag Sand-Based Concrete Incorporating Sugarcane Bagasse Ash as a Sustainable Pozzolanic Supplement

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • V. Venugopala Swamy,
  • Kumar Gedela Santhosh,
  • Sk M. Subhani

摘要

Concrete sustainability can be significantly enhanced through the combined utilization of industrial and agricultural by-products. This study investigates the performance of concrete incorporating sugarcane bagasse ash (SCBA) as a supplementary cementitious material and slag sand as a fine aggregate replacement, with particular emphasis on paver block applications. The pozzolanic reactivity of SCBA was confirmed through strength activity index (78% at 28 days), X-ray fluorescence (XRF) and X-ray diffraction (XRD) analyses. Concrete mixtures were prepared with varying SCBA (10–30%) and slag sand (0–100%) replacement levels. Results indicate that 50% slag sand replacement yielded optimal performance. The incorporation of 20% SCBA resulted in a compressive strength of 46.67 MPa, compared to 38.84 MPa for the control mix at 28 days, representing an increase of 20.17%. Durability performance improved significantly, with water sorptivity reduced from 8.90 to 7.53 mm/h⁰·⁵ and water permeability reduced by 37.28% relative to the control mix. Microstructural analysis revealed enhanced matrix densification due to increased formation of calcium silicate hydrate (C–S–H) and reduced porosity. The results demonstrate that the combined use of 20% SCBA and 50% slag sand produces mechanically superior and durable concrete suitable for pavement applications.