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处理方法对再生混凝土骨料性能的影响：综述

Impact of treatment methods on recycled concrete aggregate performance: a comprehensive review.

作者信息

Peiris Dulshi, Gunasekara Chamila, Law David W, Patrisia Yulin, Tam Vivian W Y, Setunge Sujeeva

机构信息

Civil and Infrastructure Engineering, RMIT University, Melbourne, Australia.

Teaching and Learning Department, Universitas Palangka Raya, Palangka Raya, Indonesia.

出版信息

Environ Sci Pollut Res Int. 2025 May;32(24):14405-14438. doi: 10.1007/s11356-025-36497-y. Epub 2025 May 31.

DOI:10.1007/s11356-025-36497-y
PMID:40450159
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12202523/
Abstract

The disposal of construction and demolition waste (CDW) poses a critical global environmental challenge, driven by the low recyclability of concrete due to the limitations of recycled aggregates (RA). These aggregates suffer from the high porosity of attached mortar, resulting in elevated water absorption, reduced density, and diminished mechanical performance, restricting their application in structural concrete. This comprehensive review examines innovative treatment methodologies-either removing or strengthening the attached mortar layer-aimed at mitigating these issues. The paper synthesizes findings from over 150 studies, offering a critical analysis of treatment effects on physical, mechanical, and durability properties of RAs and their corresponding concretes. The review highlights the most effective removal treatment methods, including ball milling and autogenous cleaning, and strengthening methods such as carbonation, polymer impregnation, and nano-silica treatments, demonstrating significant improvements in density, strength, and chloride resistance. Recommendations are provided for scaling these treatments, integrating durability testing, and exploring life-cycle assessment to ensure the environmental and economic feasibility of RA applications. This work underscores the transformative potential of RA treatments in advancing circular economy principles, making recycled concrete a sustainable solution for structural and non-structural applications.

摘要

建筑与拆除废物（CDW）的处理构成了一项严峻的全球环境挑战，这是由于再生骨料（RA）存在局限性，导致混凝土的可回收性较低。这些骨料因附着砂浆的高孔隙率而存在问题，导致吸水率升高、密度降低和力学性能下降，限制了它们在结构混凝土中的应用。本综述研究了旨在缓解这些问题的创新处理方法，即去除或强化附着砂浆层。本文综合了150多项研究的结果，对处理对再生骨料及其相应混凝土的物理、力学和耐久性性能的影响进行了批判性分析。该综述突出了最有效的去除处理方法，包括球磨和自生清洗，以及强化方法，如碳化、聚合物浸渍和纳米二氧化硅处理，这些方法在密度、强度和抗氯化物性能方面有显著改善。针对扩大这些处理方法的规模、整合耐久性测试以及探索生命周期评估提供了建议，以确保再生骨料应用的环境和经济可行性。这项工作强调了再生骨料处理在推进循环经济原则方面的变革潜力，使再生混凝土成为结构和非结构应用的可持续解决方案。

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