Piccinali Andrea, Diotti Alessandra, Plizzari Giovanni, Sorlini Sabrina
Department of Civil, Environmental, Architectural Engineering and Mathematics, University of Brescia, 25123 Brescia, Italy.
Materials (Basel). 2022 Feb 28;15(5):1818. doi: 10.3390/ma15051818.
This review aims to present and discuss the mechanical and environmental properties of two different type of recycled aggregates obtain from construction and demolition waste (CDW): (1) Recycled Concrete Aggregates (RCA) and (2) Mixed Recycled Aggregates (MRA). In addition, the properties of the concrete in the fresh (workability, water/cement ratio) and hardened state (mechanical and durability properties), as well as the environmental impact of the concrete produced with the two types of recycled aggregates, are presented and discussed. Due to the heterogeneous composition of recycled aggregates, the concrete properties can be significantly variable. The systematic review concerns scientific papers published from 2010 to 2020 and it shows the importance of the selection process in order to obtain high quality CDW as well as of the type of recycled aggregates on concrete properties. In particular, recycled concrete aggregates show a better quality and homogeneity than mixed recycled aggregates that make them more suitable for concrete. This work presents an overview on the influence of recycled aggregate quality on the physical, mechanical and environmental properties of concrete.
本综述旨在介绍和讨论从建筑拆除废物（CDW）中获得的两种不同类型再生骨料的力学性能和环境性能：（1）再生混凝土骨料（RCA）和（2）混合再生骨料（MRA）。此外，还介绍和讨论了新拌混凝土（工作性、水灰比）和硬化状态下混凝土的性能（力学性能和耐久性），以及用这两种类型再生骨料生产的混凝土对环境的影响。由于再生骨料组成的不均匀性，混凝土性能可能会有显著差异。该系统综述涉及2010年至2020年发表的科学论文，它表明了选择过程对于获得高质量建筑拆除废物以及再生骨料类型对混凝土性能的重要性。特别是，再生混凝土骨料比混合再生骨料具有更好的质量和均匀性，这使得它们更适合用于混凝土。本文综述了再生骨料质量对混凝土物理、力学和环境性能的影响。
