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<p>The growing emphasis on sustainable development has led the construction industry to explore innovative ways of incorporating industrial by-products into infrastructure materials. The current research proposed a novel approach of application of alkali activation for dry lean concrete (DLC) by utilizing an iron industry waste by-product as the primary binder. The proposed Alkali-Activated Dry Lean Concrete (AADLC) not only mitigates environmental impacts associated with waste disposal but also offers a sustainable and cost-effective alternative to conventional cement-based DLC. While Ordinary Portland Cement (OPC)-based DLC has been extensively studied, the application of alkali activation in DLC remains unexplored. To address this research gap, a comprehensive experimental study employing full factorial design was conducted to investigate the combined effects of binder content, sodium oxide (Na₂O) concentration, And water content on the mechanical properties of AADLC. A total of 27 mix combinations were prepared And tested in triplicate to ensure statistical accuracy. The optimal mix achieved a compressive strength of 12.1&#xa0;MPa with 171&#xa0;kg/m³ binder, 5% Na₂O, And 7.03% water content. Analysis revealed Na₂O concentration as the most influential factor for compressive strength, while binder content significantly impacted flexural strength. Regression models showed strong predictive accuracy, with R² values of 92% for compressive And 84% for flexural strength. Experimental results closely matched predicted values. Additionally, Life Cycle Assessment (LCA) and Life Cycle Cost Analysis (LCCA) of the optimized AADLC indicated a 70% reduction in carbon footprint And a 9.5% cost saving compared to traditional DLC. Further, the sensitivity analysis was performed to assess the effect of inflation on transportation and maintenance costs of the pavement. These findings highlight AADLC’s potential as a sustainable solution for pavement sub-base construction.</p>

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Development of regression model for strength prediction of Eco-Friendly alkali activated dry lean concrete for pavements

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年9月10日

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  • Somanath Khot,
  • Nitendra Palankar,
  • Vikas Gingine,
  • Ganesh Chate,
  • Archana Shagoti

摘要

The growing emphasis on sustainable development has led the construction industry to explore innovative ways of incorporating industrial by-products into infrastructure materials. The current research proposed a novel approach of application of alkali activation for dry lean concrete (DLC) by utilizing an iron industry waste by-product as the primary binder. The proposed Alkali-Activated Dry Lean Concrete (AADLC) not only mitigates environmental impacts associated with waste disposal but also offers a sustainable and cost-effective alternative to conventional cement-based DLC. While Ordinary Portland Cement (OPC)-based DLC has been extensively studied, the application of alkali activation in DLC remains unexplored. To address this research gap, a comprehensive experimental study employing full factorial design was conducted to investigate the combined effects of binder content, sodium oxide (Na₂O) concentration, And water content on the mechanical properties of AADLC. A total of 27 mix combinations were prepared And tested in triplicate to ensure statistical accuracy. The optimal mix achieved a compressive strength of 12.1 MPa with 171 kg/m³ binder, 5% Na₂O, And 7.03% water content. Analysis revealed Na₂O concentration as the most influential factor for compressive strength, while binder content significantly impacted flexural strength. Regression models showed strong predictive accuracy, with R² values of 92% for compressive And 84% for flexural strength. Experimental results closely matched predicted values. Additionally, Life Cycle Assessment (LCA) and Life Cycle Cost Analysis (LCCA) of the optimized AADLC indicated a 70% reduction in carbon footprint And a 9.5% cost saving compared to traditional DLC. Further, the sensitivity analysis was performed to assess the effect of inflation on transportation and maintenance costs of the pavement. These findings highlight AADLC’s potential as a sustainable solution for pavement sub-base construction.