Mechanical performance and resistance to carbonation of steel slag reinforced concrete

Andrade, Humberto Dias; Carvalho, José Maria Franco de; Costa, Laís Cristina Barbosa; Elói, Fernanda Pereira da Fonseca; Silva, Keoma Defáveri do Carmo e; Peixoto, Ricardo André Fiorotti

doi:10.1016/j.conbuildmat.2021.123910

Cited by 39 publications

(8 citation statements)

References 46 publications

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“…The results showed that steel slag concrete had higher compressive and flexural strength than traditional concrete. Another study by [26] investigated the durability of steel slag concrete. The results showed that steel slag concrete had lower permeability and better resistance to sulfate attack and carbonation than traditional concrete.…”

Section: Steel Slag Concretementioning

confidence: 99%

Towards a sustainable future: Emerging trends in new cement for construction materials

El-Wafa¹

2023

World J. Adv. Eng. Technol. Sci.

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The research paper offers a detailed analysis of the current trends and developments in new cement production methods to promote sustainable construction materials. The study examines three key areas: Eco-cement, Steel slag concrete, and Municipal slag concrete. Eco-cement involves using waste materials and reducing energy consumption during cement production to conserve natural resources. Steel slag concrete uses steel slag as a binder, including steel slag mixed with fly ash, steel slag with a hydrated matrix, and steelmaking slag with a carbonated matrix. Municipal slag concrete uses ground granulated melt-solidified slag derived from municipal solid waste or sewage sludge as a binder. The research paper aims to focus on contemporary trends and advancements in new cement production for the sustainability of construction materials.

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Section: Steel Slag Concretementioning

confidence: 99%

Towards a sustainable future: Emerging trends in new cement for construction materials

El-Wafa¹

2023

World J. Adv. Eng. Technol. Sci.

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“…This approach has made it possible not only to recycle steel waste currently destined for the landfill site, but also to prevent soil contamination. Andrade [18] advocated for the complete replacement of conventional aggregates with steel slag aggregates in ecological structural concretes, spanning three compressive strength classes. This substitution was carried out without chemical admixtures or with a PCE-based superplasticizer, resulting in superior mechanical performance, reflected in higher compressive strengths and better resistance to carbonation, with carbonation depths reduced by up to 60% compared with conventional concretes.…”

Section: Introductionmentioning

confidence: 99%

Natural Aggregate Substitution by Steel Slag Waste for Concrete Manufacturing

Es-samlali

2024

GEOMATE

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The release of steel slag into the environment has substantial repercussions, simultaneously affecting both the ecosystem and the economy. Therefore, the management and recovery of this waste demand careful consideration. In the context of the circular economy, this study aims to explore the feasibility of utilizing steel slag waste as a substitute aggregate for natural coarse and fine aggregates in the production of high-quality concrete. Throughout this research, concrete mixtures were developed by varying natural aggregate substitution rates with steel slag waste at 0, 25, 50, 75, and 100%. Comprehensive tests, encompassing physical, mineralogical, chemical, and mechanical analyses, were conducted on the steel slag waste to ascertain its primary technical properties. In all mixtures incorporating steel slag waste, compressive strength tests consistently revealed values surpassing those of the reference concrete. Notably, there were improvements of approximately 12% for coarse aggregate substitution and 32% for sand substitution. Assessments of flexural strength at 7 and 28 days underscored the substantial positive influence of fine and coarse aggregate substitution, especially at a 50% fine aggregate replacement, contributing significantly to enhanced flexural strength compared to conventional concrete. Furthermore, laboratory examinations indicated that the 28-day compressive and flexural strength, as well as water absorption of concrete, increased with slag content, albeit at the expense of reduced workability. Ultimately, the findings demonstrate the effective utilization of slag as a replacement for natural aggregates, maintaining the compressive and flexural strength of the concrete.

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“…Steel slag is a by-product of the steel industry mainly composed of silica, magnesium oxide, calcium oxide, aluminum and iron [1,2]. After generation, steel slag is intended to be disposed of in landfills, not only occupying massive land but also destroying the ecological environment due to the leakage of harmful components [3,4].…”

Section: Introductionmentioning

confidence: 99%

Exploring the Mechanical Properties, Shrinkage and Compensation Mechanism of Cement Stabilized Macadam-Steel Slag from Multiple Perspectives

Zhang¹,

Zheng²,

Li³

et al. 2023

Journal of Renewable Materials

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Steel slag is characterized by high strength, good wear resistance and micro-expansion. This study aims at exploring the potential of steel slag in cement stabilized aggregates, mainly including mechanical properties, shrinkage and compensation mechanisms. For this purpose, the compressive strength and compressive resilient modulus of cement stabilized aggregates with different steel slag contents (CSMS) were initially investigated. Subsequently, the effects of steel slag and cement on dry shrinkage, temperature shrinkage, and total shrinkage were analyzed through a series of shrinkage test designs. Additionally, in combination with X-ray diffraction (XRD) and Scanning electron microscope (SEM), the characteristic peaks and microscopic images of cement, steel slag and cement-steel slag at different hydration ages were analyzed to identify the chemical substances causing the expansion volume of steel slag and reveal the compensation mechanism of CSMS. The results show that the introduction of 20% steel slag improved the mechanical properties of CSMS by 16.7%, reduced dry shrinkage by 21%, increased temperature shrinkage by 5.8% and reduced its total shrinkage by 19.2%. Compared with the hydration reaction of cement alone, the composite hydration reaction of steel slag with cement does not produce new hydrates. Furthermore, it is noteworthy that the volume expansion of the f-CaO hydration reaction in steel slag can compensate for the volume shrinkage of cement-stabilized macadam. This research can provide a solid theoretical basis for the application and promotion of steel slag in cement-stabilized macadam and reduce the possibility of shrinkage cracking.

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Mechanical performance and resistance to carbonation of steel slag reinforced concrete

Cited by 39 publications

References 46 publications

Towards a sustainable future: Emerging trends in new cement for construction materials

Towards a sustainable future: Emerging trends in new cement for construction materials

Natural Aggregate Substitution by Steel Slag Waste for Concrete Manufacturing

Exploring the Mechanical Properties, Shrinkage and Compensation Mechanism of Cement Stabilized Macadam-Steel Slag from Multiple Perspectives

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