Optimization and Modelling of the Engineering properties of EPS-RHA Concrete for Eco-friendly Construction Techniques
Résumé
EPS and RHA are two distinct agro-industrial byproducts with potential for recycling and reuse, promoting environmental sustainability by minimizing disposal impacts.This study explores their feasibility as partial replacements for conventional concrete components.The research highlights their role in sustainable construction, emphasizing the importance of precise mix proportions.Scheffe's optimization model was applied to formulate a mathematical model aimed at optimizing the compressive strength of EPS-RHA concrete, incorporating cement, rice husk ash, sand, granite, polystyrene, and water.A total of 60 standard 100x100x100mm cubes were produced using 20 different mix ratios-10 for model calibration and 10 for validation.The optimized compressive strength of 32.01N/mm² was achieved after 28 days of curing with a mix ratio of 0.55:1:1.25:1.5 (water: cement/rice husk ash: sand: granite/polystyrene).The model's predictions closely matched experimental results and were validated using the Fischer test at a 95% confidence level.This predictive model provides a reliable framework for determining mix ratios to achieve targeted compressive strengths in RHA-EPS concrete.
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