article · Scientific Reports
Cassava peel ash can serve as a supplementary cementitious material in concrete production, offering a way to repurpose an abundant agricultural byproduct. Using a central composite design approach, concrete formulations containing varying amounts of cassava peel ash, cement, and aggregates were tested to identify optimal blends for structural strength. Laboratory assessments demonstrated that a specific mixture of cement, cassava peel ash, fine aggregates, and coarse aggregates achieved a peak compressive strength of 28.51 megapascals. A slightly adjusted ratio yielded a maximum flexural strength of 10.36 megapascals. Statistical evaluations and quadratic predictive models confirmed a close correlation between experimental measurements and simulated outcomes. These results demonstrate that incorporating cassava peel ash enhances concrete performance metrics while providing a viable route to lower waste in the construction sector.
Concrete production requires substantial amounts of cement, which carries high environmental costs. Utilising agricultural byproducts such as cassava peel ash helps reduce solid waste while partially substituting conventional cement. The findings show that tailored blends can improve both compressive and flexural strength, offering a practical avenue for producing more sustainable construction materials.
This work applies to sustainable building materials, targeting concrete manufacturers and construction contractors seeking to lower raw material costs and utilise agricultural residues. The study represents applied, laboratory-tested research that establishes predictive mix ratios for compressive and flexural performance. Further testing under real-world curing and operational conditions will be necessary before commercial deployment on building sites can occur.
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Cassava peel ash (CPA) is an abundant agricultural byproduct that has shown promise as an additional cementitious material in concrete manufacturing. This research study aims to optimize the incorporation of CPA in concrete blends using the central composite design (CCD) methodology to determine the most effective combination of ingredients for maximizing concrete performance. The investigation involves a physicochemical analysis of CPA to assess its pozzolanic characteristics. Laboratory experiments are then conducted to assess the compressive and flexural strengths of concrete mixtures formulated with varying proportions of CPA, cement, and aggregates. The results show that a mix ratio of 0.2:0.0875:0.3625:0.4625 for cement, CPA, fine, and coarse aggregates, respectively, yields a maximum compressive strength of 28.51 MPa. Additionally, a maximum flexural strength of 10.36 MPa is achieved with a mix ratio of 0.2:0.0875:0.3625:0.525. The experimental data were used to develop quadratic predictive models, followed by statistical analyses. The culmination of the research resulted in the identification of an optimal concrete blend that significantly enhances both compressive and flexural strength. To ensure the reliability of the model, rigorous validation was conducted using student's t-test, revealing a strong correlation between laboratory findings and simulated values, with computed p-values of 0.9987 and 0.9912 for compressive and flexural strength responses, respectively. This study underscores the potential for enhancing concrete properties and reducing waste through the effective utilization of CPA in the construction sector.
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DOI: 10.1038/s41598-024-58555-0
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