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<p>The prospect of Corn Cob Ash (CCA) as an agricultural waste by-product, a locally available stable partial substitute of Ordinary Portland Cement (OPC) in concrete is investigated in this work. CCA was added to the concrete at 0%, 5%, 10%, 15%, and 20% replacement rates, the effects it has towards important performance parameters of workability, mechanical strength (compressive, tensile, flexural strength), and durability (water absorption, ultra sound pulse velocity, and resistance to acid and sulphates) and analysis was made statically about its influence. CCA was incorporated 0%, 5%, 10%, 15% and 20% replacement by weight of cement. In 5–10% replacement by weight of cement with corn cob ash (CCA) Maintained the mechanical strength compared to control mix. At 28 days compressive strength of 10% replacement the strength is 30.7&#xa0;MPa Compared to Control mix 32.1&#xa0;MPa. Split tensile strength at 5% replacement amounted to around 3.1&#xa0;MPa and thus is nearly 3% lower than the control. The maximum replacement level of 20% had strength of approximately 2.5&#xa0;MPa which is about 22% less than the control. The flexture strength was weakest at the highest level of replacement (M20) and was approximately 4.2&#xa0;MPa showing a difference of around 19% which was lower than the control. In water absorption the absorption of water was also greater in all mixes, between 4.0% (M0) and 5.2% (M20). The lowest values of UPV are obtained at 20% replacement (M20), approximately 3.9&#xa0;km/s at 90 days, which indicates lower quality which might be caused by higher porosity or weaker matrices. Trends were confirmed with statistic tools like ANOVA and regression analysis that added to the conclusion that ten 10% CCA replacement was the most effective. The method does not just aid in sustainable construction activities and waste valorisation but also helps in the circular economy as all the agricultural wastes are turned into environment-friendly building materials.</p>

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Utilisation of waste corn cob Ash in cement concrete: A statistical approach toward environmental sustainability

  • 期刊论文

  • 发表日期：

    2025年9月12日

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  • Shubham Kesarwani,
  • Gaurav Shukla,
  • Manvendra Singh Chauhan

摘要

The prospect of Corn Cob Ash (CCA) as an agricultural waste by-product, a locally available stable partial substitute of Ordinary Portland Cement (OPC) in concrete is investigated in this work. CCA was added to the concrete at 0%, 5%, 10%, 15%, and 20% replacement rates, the effects it has towards important performance parameters of workability, mechanical strength (compressive, tensile, flexural strength), and durability (water absorption, ultra sound pulse velocity, and resistance to acid and sulphates) and analysis was made statically about its influence. CCA was incorporated 0%, 5%, 10%, 15% and 20% replacement by weight of cement. In 5–10% replacement by weight of cement with corn cob ash (CCA) Maintained the mechanical strength compared to control mix. At 28 days compressive strength of 10% replacement the strength is 30.7 MPa Compared to Control mix 32.1 MPa. Split tensile strength at 5% replacement amounted to around 3.1 MPa and thus is nearly 3% lower than the control. The maximum replacement level of 20% had strength of approximately 2.5 MPa which is about 22% less than the control. The flexture strength was weakest at the highest level of replacement (M20) and was approximately 4.2 MPa showing a difference of around 19% which was lower than the control. In water absorption the absorption of water was also greater in all mixes, between 4.0% (M0) and 5.2% (M20). The lowest values of UPV are obtained at 20% replacement (M20), approximately 3.9 km/s at 90 days, which indicates lower quality which might be caused by higher porosity or weaker matrices. Trends were confirmed with statistic tools like ANOVA and regression analysis that added to the conclusion that ten 10% CCA replacement was the most effective. The method does not just aid in sustainable construction activities and waste valorisation but also helps in the circular economy as all the agricultural wastes are turned into environment-friendly building materials.