Author(s): Prabhakar Kumar Singh and Md Daniyal

Abstract: This review explores the influence of recycled aggregates (RAs) on the properties of concrete, focusing on the environmental and mechanical aspects of their integration. Concrete, a vital construction material, is traditionally produced using natural aggregates (NAs), which contribute significantly to resource depletion and environmental degradation. With the rapid consumption of natural resources and the rise of construction and demolition waste, the adoption of RAs, sourced from recycled concrete, has gained attention as a sustainable alternative. Recycled concrete aggregates, however, possess different characteristics compared to NAs, notably higher porosity and water absorption due to adhered mortar. These differences affect the fresh and hardened properties of concrete, often leading to reduced mechanical strength and durability. Despite these challenges, several techniques, such as polymer treatment, mechanical grinding, and thermal treatment, have shown promise in improving the quality of recycled aggregates. Moreover, the incorporation of supplementary cementitious materials, such as fly ash, can further enhance the performance of concrete made with RAs. The review highlights key findings on the effects of RAs on the compressive strength, carbonation resistance, and other durability aspects of concrete, emphasizing the need for tailored mix designs and beneficiation techniques to optimize performance.

DOI: 10.22271/27078388.2025.v6.i1a.39

Pages: 55-65 | Views: 101 | Downloads: 43

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