Development of newer composite cement through mechano-chemical activation of steel slag

Singh, Siddharth; Kumari, Jyoti; Vashistha, Prabhat

doi:10.1016/j.conbuildmat.2020.121147

Cited by 39 publications

(9 citation statements)

References 38 publications

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“…In addition to these, another 44 minerals were reported as showed in Table 4. As with chemical composition, treatment or age for BOF can be produce changes in mineral composition [22,29,58]. Authors reported some phases with hydraulic properties, which can be increased mechanical resistance for Slag's AAB, like Larnite, Portlandite, Alite or Brownmillerite.…”

Section: Bof Propertiesmentioning

confidence: 99%

“…The combination of Na(OH) and Na2SiO3 brings good resistance results, better than either of these activators alone [32,40]. For levels above 2%, sulphate activators like sodium sulphate (Na2SO4) or calcium sulphate (CaSO4) showed better resistance than others activators [28,29,38]. On the other hand, calcium chloride and potassium-based activators reached the lowest mechanical resistance [29,31].…”

Section: Bof Propertiesmentioning

confidence: 99%

See 1 more Smart Citation

Steel Slag as a Precursor Material for Alkali-Activated Binders: A Systematic Review.

Borba¹,

Silva²,

Oliveira³

et al. 2022

Preprint

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Steel slag is a co-product of the steelmaking industry, this material is rarely used as a binder due to its low cementitious properties. Thus, it´s believed that the alkaline activation of steel slag can enable its use as a cementitious material. This work has the objective of making a systematic bibliographic review on the theme "slag melt as a precursor in activated alkali binders". To this end, the ProKnow-C method was used for the selection and analysis of relevant research on the topic. The portfolio resulted in 71 texts, mostly journals paper. Bibliometrics showed that the country with the most publications is China and the journal with the most publications is Construction and Building Materials. The critical analysis concluded that the XRD, XRF, and compressive strength tests are the most used for the characterization of the material. It is possible to establish that there are some knowledge gaps on the subject, such as better mechanical characterization and greater production of works with dosing by the one-part method.

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Section: Bof Propertiesmentioning

confidence: 99%

Section: Bof Propertiesmentioning

confidence: 99%

Steel Slag as a Precursor Material for Alkali-Activated Binders: A Systematic Review.

Borba¹,

Silva²,

Oliveira³

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…En la investigación de [42] se realizó la evaluación de tres tamaños de 5/10, 5/14 y 5/19 mm de agregado grueso, con un contenido de escoria de acero de horno eléctrico en porcentajes de 0, 25, 50, 75 y 100 %; se evaluaron la tracción, absorción de agua, absorción superficial inicial, porosidad, permeabilidad y resistencia al ataque de sulfatos. Por otro lado, en [43] se realizó una mezcla comparativa a base de áridos naturales en tamaños de 0/4, 4/8 y 8/16 mm. Durante la investigación experimental, los agregados naturales de 4/8 mm y 8/16 mm fueron reemplazados por escoria de acero de la misma fracción; se realizaron las pruebas de granulometría, densidad, peso específico, absorción y las características de resistencia evaluadas a los 3, 7, 14, 21, 28 y 90 días.…”

Section: Análisisunclassified

Comportamiento físico-mecánico del hormigón adicionando residuos de acero: una revisión literaria

Muñoz-Pérez

Cabrera-Alcántara

Bravo

et al. 2021

Revista UIS Ingenierías

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En la actualidad, el interés por usar materiales de desecho y subproductos provenientes del hormigón ha incrementado, debido a la necesidad de minimizar la contaminación en el planeta. El presente documento tiene como objetivo la revisión sistemática de la literatura con respecto a la implementación de los residuos de acero en la mezcla de hormigón, y cómo esto influye en su comportamiento físico-mecánico. Se ha enfocado el interés principalmente en los residuos de acero en forma de escoria, limadura, viruta y fibras, incorporados en todo tipo de hormigón estructural, utilizado en columnas, vigas, zapatas, losas y muros. El uso de estos materiales tiene un alto impacto, pues no solo ayuda a reducir el costo de fabricación de cemento y hormigón, sino que a la vez otorga numerosos beneficios ecológicos, como reducir el costo de los vertederos, ahorrar energía y proteger el medio ambiente de una posible contaminación. Se efectuó la búsqueda de artículos indexados en las diversas bases de datos, tales como ASCE, EBSCO, Google Scholar, ScienceDirect, Scopus y SpringerOpen; se seleccionó finalmente un total de 60 artículos publicados desde el año 2014. Se concluye que el uso de residuos de acero es una alternativa para incorporar a la mezcla de hormigón, pues puede reemplazar parcial o totalmente al agregado y lograr la producción de hormigones que no presenten afección en sus propiedades físico-mecánicas; e incluso, en algunos casos, mejorar dichas características.

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“…Kourounis et al [25] found BOFS inclusion in conventional cement systems to improve workability, while generally lowering nal compressive strength. Alternative processing techniques such as iron recovery [26], mechanical treatment [27], and air-granulation instead of conventional cooling have demonstrated an improve in BOFS reactivity when used as an SCM [28].…”

Section: Introductionmentioning

confidence: 99%

Basic oxygen furnace (BOF) slag as an additive in sodium carbonate-activated slag cements

Stefanini,

Walkley,

Provis

2024

Preprint

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Basic oxygen furnace slag (BOFS) is a high-volume waste resulting from the production of steel from pig iron. Due to its high free lime content, BOFS is difficult to recycle and/or include into conventional cement systems. Alkali-activation technology offers a pathway to transform industrial wastes such as BOFS into low-carbon cements. Alternative precursors for cement systems are needed as the reliance on commonly used materials like ground granulated blast furnace slag (GGBFS) is becoming unsustainable due to decreasing availability. This study investigates alkali-activated cements incorporating 20 and 30 wt. % of weathered BOFS as a replacement for GGBFS, in both sodium silicate- and sodium carbonate-activated systems. A fraction of BOFS subject to mechanical activation is compared against the untreated BOFS in the 20 wt. % systems. It is observed that in weathered BOFS, a significant portion of the free-lime is found to convert to portlandite, which accelerates alkali-activation kinetics. In sodium silicate-activated systems, the high pH of the activator results in incomplete reaction of the portlandite present in BOFS. The sodium carbonate-activated system shows near complete conversion of portlandite, causing an acceleration in the kinetics of reaction, setting, and hardening. These findings confirm the viability of sodium carbonate activated GGBFS-based systems with only a minor loss in strength properties. BOFS can be utilised as a valuable cement additive for the production of sustainable alkali-activated cements utilising sodium silicate as a less carbon-intensive activator solution than the more commonly used sodium silicate. Mechanical activation of BOFS offers further optimisation potential for alkali-activation.

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Development of newer composite cement through mechano-chemical activation of steel slag

Cited by 39 publications

References 38 publications

Steel Slag as a Precursor Material for Alkali-Activated Binders: A Systematic Review.

Steel Slag as a Precursor Material for Alkali-Activated Binders: A Systematic Review.

Comportamiento físico-mecánico del hormigón adicionando residuos de acero: una revisión literaria

Basic oxygen furnace (BOF) slag as an additive in sodium carbonate-activated slag cements

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