Author(s): Layla Al-Farooq and Ahmed Hassan Jaber

Abstract: Practical data, such as a 20% RCP mix retaining 92% of its modulus and resisting chloride ingress effectively with only 950 Coulombs passed, supports these findings for real-world applications. The increasing demand for sustainable construction materials has driven the exploration of recycled ceramic powder (RCP) as an eco-friendly alternative to conventional cement in mortar-based cementitious composites. This study aims to evaluate the impact of RCP incorporation on the workability, mechanical properties, and durability of mortars under aggressive environmental conditions. Mortar specimens were prepared with RCP replacing Ordinary Portland Cement (OPC) at 0%, 10%, 20%, and 30% by weight. The workability and setting times of the mixes were assessed, while compressive strength and durability properties, including resistance to sulfate attack, chloride ingress, and freeze-thaw cycles, were systematically evaluated. Statistical analysis, including ANOVA, was conducted to determine the significance of variations between the mixes. Microstructural analyses were performed to investigate the material's performance at the microscopic level.The results showed that RCP incorporation slightly reduced workability and delayed setting times, consistent with the finer particle size and lower hydration rates of RCP. Compressive strength decreased marginally with increasing RCP content, but the 20% replacement mix achieved a satisfactory balance between performance and sustainability. Durability tests revealed significant improvements, particularly at 20% RCP, which exhibited superior resistance to sulfate attack, chloride penetration, and freeze-thaw cycles. Statistical analysis confirmed the optimal performance of the 20% RCP mix across all durability metrics. This study concludes that RCP is a viable green alternative in cementitious composites, providing environmental benefits and enhanced durability, particularly in aggressive environments. Practical recommendations include the use of 20% RCP in coastal and cold regions, development of standardized processing methods, and further research into long-term performance and life-cycle assessments. These findings underscore the potential of RCP to contribute to sustainable construction and waste management practices.

DOI: 10.22271/27078361.2024.v5.i2a.56

Pages: 37-42 | Views: 74 | Downloads: 25

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