Functionalization of waste-derived artificial aggregates: A state-of-the-art review

IF 11.2 1区环境科学与生态学 Q1 ENGINEERING, ENVIRONMENTAL

Resources Conservation and Recycling Pub Date : 2024-11-09 DOI:10.1016/j.resconrec.2024.107999

Lan-Ping Qian , Ling-Yu Xu , Bo-Tao Huang , Yi Li , Jirong Lan , Fuyuan Gong , Hong Guan

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Abstract

In modern civil engineering, advanced concrete materials are expected to not only possess excellent mechanical and durability properties but also exhibit additional functions. Waste-derived artificial aggregate (AA) is an innovative designable aggregate type with high sustainability and value-added properties. This study provided a comprehensive literature review on the functionalization of designable AA for the first time. The intrinsic characteristics of AA that are potential for realizing its functionalization were first introduced, where the AA's porous structure and chemical reactivity were ideal for internal curing, self-healing, purification, or foamed concrete application. Then, the functionalities of AA through encapsulating modification materials were discussed, where encapsulating AA with polymers or bacteria could enhance self-healing, combining AA with phase change materials allowed for energy efficiency, and adding additives like carbon fiber or magnetite could offer AA with conductivity and electromagnetic shielding characteristics. Additionally, the structural designs of AA for improved functions were summarized, where core-shell and hollow designs in AA could improve heavy metal immobilization and create cavities for specialized applications. Finally, the future perspectives of the AA functionalization technology were proposed. The contributions of this review could provide helpful guidelines for the future development, promotion, and practical applications of sustainable AA with additional functions.

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源自废物的人工骨料的功能化：最新进展综述

在现代土木工程中，人们希望先进的混凝土材料不仅具有出色的机械和耐久性能，而且还能发挥更多功能。废弃物衍生的人工骨料（AA）是一种创新的可设计骨料类型，具有高度的可持续性和增值特性。本研究首次对可设计 AA 的功能化进行了全面的文献综述。首先介绍了 AA 有可能实现其功能化的内在特性，其中 AA 的多孔结构和化学反应活性是内部固化、自愈、净化或发泡混凝土应用的理想选择。然后，讨论了 AA 通过封装改性材料实现功能化的问题，其中用聚合物或细菌封装 AA 可增强自愈合能力，将 AA 与相变材料结合可提高能源效率，添加碳纤维或磁铁矿等添加剂可使 AA 具有导电性和电磁屏蔽特性。此外，还总结了可改善功能的 AA 结构设计，其中 AA 中的核壳和空心设计可提高重金属固定性，并为特殊应用创造空腔。最后，提出了 AA 功能化技术的未来展望。本综述可为具有附加功能的可持续 AA 的未来开发、推广和实际应用提供有益的指导。

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来源期刊

Resources Conservation and Recycling 环境科学-工程：环境

CiteScore

22.90

自引率

6.10%

发文量

625

审稿时长

23 days

期刊介绍： The journal Resources, Conservation & Recycling welcomes contributions from research, which consider sustainable management and conservation of resources. The journal prioritizes understanding the transformation processes crucial for transitioning toward more sustainable production and consumption systems. It highlights technological, economic, institutional, and policy aspects related to specific resource management practices such as conservation, recycling, and resource substitution, as well as broader strategies like improving resource productivity and restructuring production and consumption patterns. Contributions may address regional, national, or international scales and can range from individual resources or technologies to entire sectors or systems. Authors are encouraged to explore scientific and methodological issues alongside practical, environmental, and economic implications. However, manuscripts focusing solely on laboratory experiments without discussing their broader implications will not be considered for publication in the journal.