Green high-strength concrete incorporation of agricultural wastes as rice straw ash, palm leaf ash and olive waste ash
Volume Title: ICASGE2025
Paper ID : 1158-ICASGE (R1)
Authors
Abstract
This study explores the use of agricultural waste ashes, such as rice straw ash (RSA), palm leaf ash (PLA), and olive waste ash (OWA), in green high-strength concrete (GHSC) as partial cement substitutes. The study aims to improve the mechanical qualities of concrete while preserving or increasing its sustainability. Utilizing these waste materials as a partial replacement for Portland cement offers a viable pathway for mitigating greenhouse gas emissions and alleviating the impacts of global warming. Compressive strength, flexural strength, and modulus of elasticity were among the fresh and hardened qualities assessed when the ashes were employed at different replacement levels (5%, 10%, 20%, and 30%). According to the findings, the mechanical characteristics were considerably enhanced by moderate replacement levels (20% for RSA and PLA and 10% for OWA) because of better pozzolanic reactions and matrix densification. However, performance decreased with increasing replacement levels, most likely as a result of a weakened matrix. The study demonstrates that agricultural waste ashes can serve as effective cement replacements, reducing environmental impact and promoting sustainable construction practices, with optimal replacement levels ensuring both performance and eco-friendliness.
Keywords
Green high-strength concrete; Agricultural Waste Ashes; Rice Straw Ash (RSA); Palm Leaf Ash (PLA); Olive Waste Ash (OWA); mechanical properties; Sustainability; Eco-friendly Construction; modulus of elasticity; Compressive strength
Subjects