Interfacial transition zone of cement composites with steel furnace slag aggregates

Brand, Alexander S.; Roesler, Jeffery R.

doi:10.1016/j.cemconcomp.2017.11.012

Cited by 59 publications

(30 citation statements)

References 24 publications

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“…Qualitative analysis of the XRD revealed the presence of wüstite (FeO), larnite (β-dicalcium silicate, Ca 2 SiO 4 ), mayenite (Ca 12 Al 14 O 33 ), and periclase (MgO) in the LMF slag. Recent research by Brand and Roesler [ 21 , 55 ] also revealed that larnite and wüstite are common mineral phases in any steel slag type (EAF, BOF, and LMF slags), which is also consistent with Motz and Geiseler [ 17 ]. While phases like mayenite and periclase or magnesium oxide (MgO) are mostly seen in EAF slags, the LMF slag also show only the presence of both oxides [ 18 , 83 ].…”

Section: Resultssupporting

confidence: 70%

“…The soil stabilization was carried out at 10% and 15% additions of SFS by weight. Ladle metallurgy furnace (LMF) slag, also known as secondary refining slag, was employed in this study, which is a promising SFS type and shares common chemical features with other steel slags [ 18 , 21 , 36 , 52 , 53 , 54 , 55 ]. In addition, CaCl 2 was selected as a potential chemical admixture to accelerate the hydration of the dicalcium silicate phase in the SFS.…”

Section: Introductionmentioning

confidence: 99%

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Stabilization of a Clayey Soil with Ladle Metallurgy Furnace Slag Fines

et al. 2020

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The research study described in this paper investigated the potential to use steel furnace slag (SFS) as a stabilizing additive for clayey soils. Even though SFS has limited applications in civil engineering infrastructure due to the formation of deleterious expansion in the presence of water, the free CaO and free MgO contents allow for the SFS to be a potentially suitable candidate for clayey soil stabilization and improvement. In this investigation, a kaolinite clay was stabilized with 10% and 15% ladle metallurgy furnace (LMF) slag fines by weight. This experimental study also included testing of the SFS mixtures with the activator calcium chloride (CaCl2), which was hypothesized to accelerate the hydration of the dicalcium silicate phase in the SFS, but the results show that the addition of CaCl2 was not found to be effective. Relative to the unmodified clay, the unconfined compressive strength increased by 67% and 91% when 10% and 15% LMF slag were utilized, respectively. Likewise, the dynamic modulus increased by 212% and 221% by adding 10% and 15% LMF slag, respectively. Specifically, the LMF slag fines are posited to primarily contribute to a mechanical rather than chemical stabilization mechanism. Overall, these findings suggest the effective utilization of SFS as a soil stabilization admixture to overcome problems associated with dispersive soils, but further research is required.

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Section: Resultssupporting

confidence: 70%

Section: Introductionmentioning

confidence: 99%

Stabilization of a Clayey Soil with Ladle Metallurgy Furnace Slag Fines

et al. 2020

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“…LFS presents hydraulicity that provides it with slightly cementitious properties [20,21], thus the addition of LF slag is mainly explored when preparing Portland cement mixtures [20,22,23]. The potential of LFS in building and construction research has also been studied, mainly to replace cement and lime in varied applications, such as mortars and concrete [24,25,26], plasterboard [27], and soil stabilization [28], among others. One of the issues related to the reuse of slag is its potential expansion.…”

Section: Introductionmentioning

confidence: 99%

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

et al. 2019

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Electric arc furnace slag (EAFS) and ladle furnace slag (LFS) are by-products of the electric steelmaking sector with suitable properties for use in bituminous mixtures as both coarse and fine aggregates, respectively. In this research, the production of a porous asphalt mixture with an aggregate skeleton consisting exclusively of electric steelmaking slags (using neither natural aggregates nor fillers) is explored. The test program examines the asphalt mixtures in terms of their mechanical performance (abrasion loss and indirect tensile strength), durability (cold abrasion loss, aging, and long-term behavior), water sensitivity, skid and rutting resistance, and permeability. The results of the slag-mixes are compared with a standard mix, manufactured with siliceous aggregates and cement as filler. The porous mixes manufactured with the slags provided similar results to the conventional standard mixtures. Some issues were noted in relation to compaction difficulties and the higher void contents of the slag mixtures, which reduced their resistance to raveling. Other features linked to permeability and skid resistance were largely improved, suggesting that these mixtures are especially suitable for permeable pavements in rainy regions. In conclusion, a porous asphalt mixture was produced with 100% slag aggregates that met current standards for long-lasting and environmentally friendly mixtures.

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“…Estudos realizados [45,46] constataram aumento da resistência à compressão e a tração na flexão com o aumento de escória. Isto pode ser justificado pela forma irregular dos grãos de escória, há um melhor intertravamento entre a pasta de cimento e os grãos de escória, melhorando a zona de transição [47,48,49].…”

Section: Resultados E Discussõesunclassified

Propriedades mecânicas de argamassas com substituição da areia natural por escória de aciaria BSSF (baosteel's slag short flow)

et al. 2020

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RESUMO A geração de resíduos tem se tornado uma questão preponderante para a indústria siderúrgica em virtude da grande quantidade de resíduos gerados, e que demandam maior planejamento na destinação desses subprodutos. Aliado a isto, a escassez de insumos de boa qualidade e em locais próximos aos centros consumidores tem aumentado o interesse por produtos que causem menor impacto ambiental e de custos mais reduzidos. Neste sentido, o presente trabalho teve por objetivo avaliar as propriedades mecânicas de argamassas com a substituição da areia natural por escória de aciaria Baosteel's Slag Short Flow. O trabalho experimental contou com ensaios de caracterização da escória, bem como caracterização das propriedades das argamassas no estado fresco nos traços 1:3, 1:5, 1:7 (cimento: agregado), 1:1:4, 1:1:6 e 1:1:8 [LFJ1] (cimento: cal: agregado:), produzidos com a substituição da areia natural por escória nos teores de 0 %, 20 %, 40 % e 60 %, [LFJ2] em volume. Pode-se constatar que as argamassas com maiores teores de escória demandaram uma maior quantidade de água para obter o espalhamento fixo de 260 ± 5mm. A substituição da areia pela escória ocasiona um aumento significativo na massa especifica no estado endurecido e no módulo de elasticidade dinâmico, tanto para as argamassas de cimento Portland como para as mistas. Quanto a velocidade de propagação ultrassônica (VPU) o teor de substituição não influencia significativamente nas argamassas de cimento Portland , entretanto exerce influência significativa nas argamassas mistas. Em relação a resistência à compressão e a tração na flexão, apesar do teor de substituição de 40% apresentar os maiores valores de resistência à tração, conforme a análise de variância o teor de substituição não exerce influência significativa nestas propriedades.

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Interfacial transition zone of cement composites with steel furnace slag aggregates

Cited by 59 publications

References 24 publications

Stabilization of a Clayey Soil with Ladle Metallurgy Furnace Slag Fines

Stabilization of a Clayey Soil with Ladle Metallurgy Furnace Slag Fines

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

Propriedades mecânicas de argamassas com substituição da areia natural por escória de aciaria BSSF (baosteel's slag short flow)

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