Systematic review highlights treatment methods for enhancing recycled concrete aggregates, suggesting approaches to reduce costs.
Recycled concrete aggregates (RCA), derived from old and demolished buildings, offer a sustainable alternative to natural aggregates, reducing carbon emissions by 20–35% and saving 15–40% of natural resources. However, the old adhered mortar, due to its porosity and water absorption, adversely impacts the properties of RCA. Treatments like mechanical, chemical, or thermal methods can enhance RCA strength by up to 22% by removing or strengthening the mortar. Despite their benefits, treatments such as carbonation and nanomaterial intrusion add costs, making the method selection crucial. This article reviews the treatment methods and proposes a systematic approach for choosing cost-effective and scalable solutions.
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Patil et al. (2025) studied this question.
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