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A comprehensive review on properties of tailings-based low-carbon concrete: Mechanical, environmental, and toxicological performances
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.ORCID iD: 0000-0003-4902-5877
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.ORCID iD: 0000-0002-9431-7820
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Environmental Science.ORCID iD: 0000-0001-8413-3975
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building Engineering, Energy Systems and Sustainability Science, Energy Systems and Building Technology.ORCID iD: 0000-0003-2023-689x
2024 (English)In: Developments in the Built Environment, E-ISSN 2666-1659, Vol. 18, article id 100428Article in journal (Refereed) Published
Abstract [en]

With concrete’s key role in construction and infrastructure, the reduction of its carbon footprint is critical for addressing global carbon emissions. One strategy to reduce environmental impact from concrete production is to replace cement clinker or fine aggregates in concrete with industrial wastes. Mine tailings, being a high-volume under-utilized resource, possess properties making it suitable for use as a partial substitute for cement or fine aggregates. This review article provides an overview of the recent findings within the topic of tailings-based concrete (TBC). Many of the identified publications aimed to describe the mechanical performance of TBC, and to optimize the concrete mix with respect to the strength and durability. The recommended cement replacement ranged from 5 to 25% and the recommended fine aggregate replacement ranged from 20 to 60%. In general, the compressive strength was decreased with increasing use of tailings as a replacement of cement. For the use of tailings as replacement for fine aggregates, the correlation was more complex, normally the mechanical performance enhanced at low replacement levels, until it reached an optimum after which it decreased. CO2 savings for replacing fine aggregate with tailings were up to 12% and for the cement replacement up to 30%. When assessing the environmental performance, most of the publications did not account for the loss of its mechanical performance, which could lead to the risk of underestimating the environmental impact. This review not only provides a basis for understanding the mechanical, toxicological, and environmental performances of TBCs, but also links the perspectives together, unveiling the connections between them. Moreover, this review presents an organized overview of the topic of TBC and points out topics for future research.

Place, publisher, year, edition, pages
Elsevier , 2024. Vol. 18, article id 100428
Keywords [en]
Tailings; Concrete; Supplementary cementitious materials; Waste; Cement; Aggregate; Mechanical performance; Toxicological performance; Environmental performance
National Category
Civil Engineering
Identifiers
URN: urn:nbn:se:hig:diva-44024DOI: 10.1016/j.dibe.2024.100428Scopus ID: 2-s2.0-85189935433OAI: oai:DiVA.org:hig-44024DiVA, id: diva2:1849811
Funder
University of GävleAvailable from: 2024-04-09 Created: 2024-04-09 Last updated: 2024-05-16Bibliographically approved

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Johansson, LisenBahrami, AlirezaWallhagen, MaritaCehlin, Mathias

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