The utilisation of carbonated recycled aggregates in concrete has been increasingly considered as an effective strategy for CO2 sequestration in the built environment and enhancement of concrete sustainability. Following up a pervious review on the role of carbonated recycled concrete aggregates in the mechanical properties of concrete, this paper presents a comprehensive review on the effects of carbonation treatment on the chemical compositions and physical properties of recycled concrete aggregates, as well as the role of carbonated recycled concrete aggregates in microstructure and durability-related properties including volume deformation, transport properties, chemical resistance, freeze-thaw resistance and fire resistance of concrete. A special focus is placed on the relationship between microstructure and durability-related properties of carbonated recycled aggregate concrete considering the effects of pre-treatment method, replacement level, curing age, water-to-binder ratio and quality of the original aggregates. The insights into the deterioration mechanism and strategies for improving the durability of carbonated recycled aggregate concrete are provided. This review summarises the recent advances in the field, followed by a discussion on the remaining challenges and opportunities for future research.

中文翻译：

---

含碳酸再生骨料的混凝土的耐久性：全面综述


在混凝土中使用碳酸再生骨料越来越被认为是在建筑环境中封存二氧化碳和增强混凝土可持续性的有效策略。在对碳酸盐再生混凝土骨料在混凝土力学性能中的作用进行综述之后，本文全面综述了碳化处理对再生混凝土骨料化学成分和物理性能的影响，以及碳酸盐再生混凝土骨料在微观结构和耐久性相关性能中的作用，包括体积变形、 混凝土的运输性能、耐化学性、抗冻融性和耐火性。考虑到预处理方法、更换水平、养护年龄、水与粘合剂比和原始骨料质量的影响，特别关注碳酸盐再生骨料混凝土的微观结构和耐久性相关性能之间的关系。本文对提高碳酸再生骨料混凝土耐久性的劣化机制和策略提供了见解。本文总结了该领域的最新进展，然后讨论了未来研究的剩余挑战和机遇。