Journal ArticleDOI
Use of steel slag as sustainable construction materials: A review of accelerated carbonation treatment
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TLDR
In this article, a review of various types of steel slags based on chemical/mineral compositions and related physic-chemical properties is presented, which highlights recent progress on the use of accelerated carbonation to improve the quality of slags in the context of a wide range of influencing factors, such as temperature, reaction time, CO2 concentration and pressure, moisture, particle size and gradation of slag and additives.Abstract:
Steel slag is a by-product discharged from the steelmaking process, which is characterized by abundant free calcium/magnesium oxide, low cementitious properties, and high contents of heavy metals. The disposal of steel slag at landfills not only wastes valuable resources but also causes serious pollutions to the environment. However, the direct use of untreated steel slag poses a great risk to the mechanical properties and durability of the steel slag-derived composites. In recent years, research on the use of steel slag as eco-friendly construction materials has experienced an unprecedented advance, particularly with the discovery that accelerated carbonation is conducive to improving the inferior properties. This review summarizes the various types of steel slags based on chemical/mineral compositions and the related physic-chemical properties. It also highlights recent progress on the use of accelerated carbonation to improve the quality of steel slag in the context of a wide range of influencing factors, such as temperature, reaction time, CO2 concentration and pressure, moisture, particle size and gradation of steel slag, and additives. A major challenge is to dissect the interconnectedness between the influencing factors and their relative contributions to the property improvement of steel slag. After that, we introduce the practical applications of carbonated steel slag with improved properties. Finally, we provide new insights into the mechanisms and challenges of using accelerated carbonation as a treatment of steel slag for future research and industrial applications.read more
Citations
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Journal ArticleDOI
Environmental benefit assessment of steel slag utilization and carbonation: A systematic review.
TL;DR: In this article, the authors comprehensively review the environmental performance of steel slag utilization, especially emphasizing quantitative evaluation using life cycle assessment, and summarize the key findings of the environmental benefits for steel-slag utilization using life-cycle assessment from the reviewed literature.
Journal ArticleDOI
Environmental benefit assessment of steel slag utilization and carbonation: A systematic review
TL;DR: In this article , the authors comprehensively review the environmental performance of steel slag utilization, especially emphasizing quantitative evaluation using life cycle assessment, and summarize the key findings of the environmental benefits for steel-slag utilization using life-cycle assessment from the reviewed literature.
Journal ArticleDOI
Sustainable phosphorus supply by phosphorus recovery from steelmaking slag: a critical review
TL;DR: In this paper , the thermodynamic properties of phosphorus in steelmaking slags, the enrichment of phosphorus-rich part from steel making slags and the extraction of phosphorus by pyro- and hydro-metallurgical processes are reviewed.
Journal ArticleDOI
An overview of utilizing CO2 for accelerated carbonation treatment in the concrete industry
Liangxia Li,Min-Zhi Wu +1 more
TL;DR: In this article , the authors provided a state-of-the-art summary on the relevant carbonation strategies that have been investigated, with a special focus on identifying the remaining industrial challenges and critical research gaps that need further investigation.
Journal ArticleDOI
Effect of direct carbonation routes of basic oxygen furnace slag (BOFS) on strength and hydration of blended cement paste
TL;DR: In this article, the influence of reaction parameters including solid to liquid ratio, CO2 flow rate, temperature, volume of water and carbonation time on aqueous carbonation of basic oxygen furnace slag (BOFS) in maximizing CO2 sequestration was determined.
References
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A review of accelerated carbonation technology in the treatment of cement-based materials and sequestration of CO2
TL;DR: The effects of the accelerated carbonation reaction on the solid phase are discussed and future potential applications of this technology are also considered.
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An overview of utilization of slag and sludge from steel industries
TL;DR: In this paper, the characterization, beneficiation and utilization aspects of blast furnace flue dust, blast furnace sludge, LD sludge and LD slag generated at modern steel plants are analyzed.
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Mineral CO2 sequestration by steel slag carbonation.
TL;DR: Alkaline Ca-rich industrial residues are presented as a possible feedstock for mineral CO2 sequestration and the carbonation reaction was found to occur in two steps: leaching of calcium from the steel slag particles into the solution and precipitation of calcite on the surface of these particles.