Mechanical and durability performance of concretes produced with steel slag aggregate and mineral admixtures

Costa, Laís Cristina Barbosa; Nogueira, Marcela Aguiar; Andrade, Humberto Dias; Carvalho, José Maria Franco de; Elói, Fernanda Pereira da Fonseca; Silva, Guilherme Jorge Brigolini; Peixoto, Ricardo André Fiorotti

doi:10.1016/j.conbuildmat.2021.126152

Cited by 43 publications

(6 citation statements)

References 54 publications

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“…Costa et al also reported this justification when they observed the porosity on the surface of the SS aggregates. The significant improvement in the mechanical properties of the concrete in their research was attributed to the porous nature of SS [45]. The findings of the SEM analysis of this study provide further evidence for the positive impact of using steel slag as an aggregate in concrete.…”

Section: Compressive Strength Of Concretesupporting

confidence: 55%

Evaluation of the Performance of Steel Slag and Waste Glass as a Cement Replacement

Azeez,

Hassan,

Atiyah

2023

ETJ

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This work assessed the pozzolanic activity of locally available steel slag and waste glass in mortars.• Effects of steel slag and waste glass replacing cement on workability, density, and strength index are studied. • Unlike waste glass, steel slag decreased mortar strength and workability. • Steel slag improved compressive strength and mitigated the negative impact of waste glass in concrete.The industrial development and growth in population activity caused an annual increase in solid wastes over the past decades. The emissions of CO2 from the cement industry are the main source of air pollution. Recycling wastes as cementitious materials conserve the ecosystem in different aspects, e.g., reduction of CO2 footprint. Consequently, the pozzolanic activity of two solid wastes abundantly available in Iraq, steel slag (SS) and waste glass (WG), were evaluated. This study aimed to replace them with ordinary Portland cement. This will achieve a sustainable, eco-efficient, and environmentally friendly construction industry. The Chemical analysis of the wastes by XRF and XRD suggests a possible cementitious capability owing to the amorphous nature of WG and the presence of C3S and C2S in SS. Accordingly, due to international standards, cubic mortars were produced by replacing cement with SS at 50% and WG at 50% and 20%. The effects of such replacements on the compressive strength of mortars were evaluated by comparison with that of the control mortars. WG increases workability and results in a higher strength index (72.8%) than that of SS (48.7%) at similar replacement levels (50%). Subsequently, SS and WG replaced coarse aggregates (CA) and cement, respectively, in concrete. The results revealed positive effects of SS on compressive strength in contrast to WG influence. The compressive strength of concrete cured for 91d increased by about 20% compared to the control sample upon incorporation of 50% SS without any WG.

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Section: Compressive Strength Of Concretesupporting

confidence: 55%

Evaluation of the Performance of Steel Slag and Waste Glass as a Cement Replacement

Azeez,

Hassan,

Atiyah

2023

ETJ

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“…Current research shows that steel slag can enhance its cementitious activity through chemical and mechanical activation, and it performs well when incorporated into products like concrete [15][16][17][18][19]. However, most studies have focused on the overall amount of steel slag added, and relatively few studies have been carried out on the effect of the key factor of the steel slag particle size [20,21]. The properties of steel slag, such as the particle size, distribution curve, and specific surface area, determine the gelling activity of steel slag.…”

Section: Introductionmentioning

confidence: 99%

Influence of the Steel Slag Particle Size on the Mechanical Properties and Microstructure of Concrete

Li,

Lu,

Liu

et al. 2024

Sustainability

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The present paper probes into the influence of the steel slag particle size on the mechanical properties and microstructure of concrete, with steel slag serving as the primary raw material. Steel slag with different particle sizes was selected as the partial substitute material for concrete by mechanical grinding. The influence of steel slag on the compressive strength, bending strength, and microstructure of concrete was determined by laser particle size analyzer, specific surface area analyzer, strength experiment, X-ray diffraction (XRD), and scanning electron microscope (SEM). The results show that mechanical grinding has significant effects on the particle size distribution and specific surface area of the steel slag. The optimal grinding time is 20 min and the specific surface area is 0.65 m2/g. D10, D50 and D90 are 0.91 μm, 16.57 μm and 46.40 μm, respectively. The steel slag with a fine particle size can better fill the pores in concrete and improve the compactness, thus enhancing the mechanical properties of concrete. The change in the steel slag particle size does not change the type of hydration products, but the smaller the particle size of steel slag, the better the gelling activity, the larger the hydration products, the denser the structure, and the better the mechanical properties. Therefore, the present study provides an important theoretical basis and practical guidance for the application of steel slag as an additive in the concrete industry.

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“…According to the findings of Cristina Barbosa [16], the incorporation of steel slag as an aggregate and mineral powder in concrete, while replacing conventional aggregates and commercial mineral additions, improved the durability of the material against chloride attack. This improvement is evidenced by reduced chloride penetration depth, decreased water absorption, and increased compressive and tensile strengths.…”

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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Mechanical and durability performance of concretes produced with steel slag aggregate and mineral admixtures

Cited by 43 publications

References 54 publications

Evaluation of the Performance of Steel Slag and Waste Glass as a Cement Replacement

Evaluation of the Performance of Steel Slag and Waste Glass as a Cement Replacement

Influence of the Steel Slag Particle Size on the Mechanical Properties and Microstructure of Concrete

Natural Aggregate Substitution by Steel Slag Waste for Concrete Manufacturing

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