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<p>Concrete is a versatile and durable material essential for pavements and construction, widely used globally for infrastructure development. The cement is a concrete constituent which produces 5–7% of global greenhouse gases. Also, excessive extraction of river sand leads to over-mining. This research addresses the issues mentioned above by replacing Portland cement (PC) with sugarcane bagasse ash (SCBA) and fine aggregates (FA) with recycled concrete fine aggregate (RCFA). Concrete mixes were cast with the SCBA and RCFA at 10% and 20% replacement levels to assess the mechanical properties, i.e., compressive strength (CS), split tensile strength (STS), and flexural strength (FS) of concretes at 7, 14, and 28&#xa0;days of curing periods. The microstructural properties of the concrete mixes were evaluated using SEM analysis. Further, the response surface method (RSM) is employed to analyze the combined influence of SCBA and RCFA on CS and optimize the dosage of SCBA and RCFA in concrete. Also, a mathematical model was developed using RSM to predict CS based on input variables. Findings suggest that a mix with 20% SCBA and 0% RCFA leads to the highest CS, while a blend with 0% SCBA and 10% RCFA replacement level shows the lowest CS. Compared to the control mix (CM), the CS was higher in all replacement mixes. The optimized results from the RSM indicate that a combination of 20% SCBA and 20% RCFA is the most effective in achieving the desired CS. The research highlights the reuse of industrial by-products and waste to create sustainable, cost-effective concrete.</p>

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Evaluation of mechanical properties and optimization of compressive strength of concrete incorporating sugarcane bagasse ash and recycled fine aggregate for sustainable pavement applications

  • 期刊论文

  • 发表日期：

    2025年10月1日

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  • Sachin Pandey,
  • Roop Kishor

摘要

Concrete is a versatile and durable material essential for pavements and construction, widely used globally for infrastructure development. The cement is a concrete constituent which produces 5–7% of global greenhouse gases. Also, excessive extraction of river sand leads to over-mining. This research addresses the issues mentioned above by replacing Portland cement (PC) with sugarcane bagasse ash (SCBA) and fine aggregates (FA) with recycled concrete fine aggregate (RCFA). Concrete mixes were cast with the SCBA and RCFA at 10% and 20% replacement levels to assess the mechanical properties, i.e., compressive strength (CS), split tensile strength (STS), and flexural strength (FS) of concretes at 7, 14, and 28 days of curing periods. The microstructural properties of the concrete mixes were evaluated using SEM analysis. Further, the response surface method (RSM) is employed to analyze the combined influence of SCBA and RCFA on CS and optimize the dosage of SCBA and RCFA in concrete. Also, a mathematical model was developed using RSM to predict CS based on input variables. Findings suggest that a mix with 20% SCBA and 0% RCFA leads to the highest CS, while a blend with 0% SCBA and 10% RCFA replacement level shows the lowest CS. Compared to the control mix (CM), the CS was higher in all replacement mixes. The optimized results from the RSM indicate that a combination of 20% SCBA and 20% RCFA is the most effective in achieving the desired CS. The research highlights the reuse of industrial by-products and waste to create sustainable, cost-effective concrete.