Steelmaking slag as aggregate for mortars: Effects of particle dimension on compression strength

Faraone, Nicola; Tonello, Gabriele; Furlani, Erika; Maschio, S.

doi:10.1016/j.chemosphere.2009.08.002

Cited by 64 publications

(28 citation statements)

References 15 publications

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“…Ethylene glycol and complexometric titration has previously been used to determine the free CaO content of cement and clinker [32], but it is also been applied to SFS [5,27,[33][34][35][36][37][38][39]. Ethylene glycol will form a complex with any free CaO present, but will also complex with some, but not necessarily all, of the Ca(OH) 2 present [40].…”

Section: Chemical and Mineralogical Characterizationmentioning

confidence: 99%

“…Inductively coupled plasma (ICP) spectroscopy has been a technique that has been routinely applied for quantitative elemental analysis of SFS [24][25][26][27][28][29][30][31]. In this study inductively coupled plasma optical emission spectroscopy (ICP-OES) was conducted, using a PerkinElmer Optima 2000DV ICP-OES.…”

Section: Chemical and Mineralogical Characterizationmentioning

confidence: 99%

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Steel furnace slag aggregate expansion and hardened concrete properties

Brand

Roesler

2015

Cement and Concrete Composites

206

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Section: Chemical and Mineralogical Characterizationmentioning

confidence: 99%

Section: Chemical and Mineralogical Characterizationmentioning

confidence: 99%

Steel furnace slag aggregate expansion and hardened concrete properties

Brand

Roesler

2015

Cement and Concrete Composites

206

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“…Portanto, a expectativa é que falte escória de alto-forno num futuro breve. A escória de aciaria poderia ser uma alternativa como adição mineral no cimento, como substituição à escória de alto-forno [1][2][3][4]. Porém, o uso direto da escória de aciaria no cimento não é recomendado devido à sua expansibilidade durante a hidratação, causada pelo CaO e MgO livres e pela fase RO rica em Mg [5,6].…”

Section: Introductionunclassified

Modificação De Escória De Aciaria Fundida Para Aplicação Em Cimento

Neto¹,

Fredericci²,

Faria³

et al. 2017

Anais Do Congresso Anual Da ABM

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ResumoA escória de aciaria pode ser uma alternativa como mistura para o cimento portland, substituindo parcialmente a escória de alto-forno. Um processo pirometalúrgico tem sido desenvolvido para promover a modificação química da escória de aciaria LD. Os experimentos foram realizados através da refusão de 300 kg de escória de aciaria LD, seguido de sua modificação no estado líquido. Essas escórias foram resfriadas com o uso de esferas metálicas. Análises de fluorescência de raios-X (FRX) e microscopia eletrônica de varredura (MEV) das escórias revelaram uma relação entre composição química, condição de resfriamento e a formação de fases cristalina ou vítrea. As amostras de cimento foram obtidas através da mistura de 25% de escória modificada e 75% de cimento Portland, resultando em mais de 280 J/g de calor de hidratação acumulado em 72h, expansão abaixo de 0,1% em ensaio em autoclave e resistências à compressão acima de 42 MPa com 28 dias. O processo mostra potencial para ser aplicado no tratamento de escória de aciaria LD. Palavras-chave: Escória; Cimento; Modificação; Rejeitos. TREATMENT OF MOLTEN STEEL SLAG FOR CEMENT APPLICATION AbstractSteel slag can be an alternative in cement mineral admixture, partially as a substitute for blast furnace slag. A pyrometallugical process has been investigated to promote the chemical composition modification of molten steelmaking slag in a metallurgical reactor. Experiments were conducted by remelting 300 kg of steel slag followed by chemical modification of liquid slag. The modified slags were naturally cooled in the metallurgical reactor or cooled by steel balls. XRD and SEM analysis of slag samples revealed the relationship among chemical composition, cooling conditions and amorphous and crystalline phases. Cement samples were produced by mixing 25% of treated steelmaking slag with 75% of Portland cement, resulting in more than 280 J/g of accumulated hydration heat in 72 h, expansion lower than 0,1% in the autoclave tests and compressive strength higher than 42 MPa after 28 days. The process indicates potential to be applied as a steelmaking slag treatment.

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“…A slag-free composition was prepared to produce reference samples. All mortars were prepared with a fixed aggregate/cement ratio (6/1), as has been often proposed in literature [18,[22][23][24], a fixed superplasticizer/cement ratio (s/c) and a fixed water/cement ratio (w/c). Materials were aged in water for different times up to the limit of 1100 days.…”

Section: Introductionmentioning

confidence: 99%

Production and Compression Strength of Mortars Containing Unprocessed Waste Powdered Steel Slag

et al. 2017

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This paper deals with the production of mortars prepared using a commercial CEMIIB-S 42.5N cement, a natural aggregate, steelmaking slag, a superplasticizer and water. The as-received unprocessed steel slag was milled by a hammer mill and then sieved to obtain batches with different maximum particle size. Each batch was used, together with the other components, in the production of mortars which were tested, by compression and water absorption, after different aging times in order to evaluate their long term stability. Several slag-free samples were also prepared as reference materials. All mortars were prepared with fixed aggregate/cement ratio (6/1), superplasticizer/cement ratio (s/c) and water/cement ratio (w/c). It has been demonstrated that an adequate protocol for the preparation and the use of slag containing particles with 2500 µm maximum size lead to the production of materials with mechanical properties suitable for civil engineering applications after aging for 28, 90 and 180 days. However, samples containing slag particles with size equal or greater than 1000 µm display a decay of mechanical properties after longer aging in water or after accelerated aging.

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Steelmaking slag as aggregate for mortars: Effects of particle dimension on compression strength

Cited by 64 publications

References 15 publications

Steel furnace slag aggregate expansion and hardened concrete properties

Steel furnace slag aggregate expansion and hardened concrete properties

Modificação De Escória De Aciaria Fundida Para Aplicação Em Cimento

Production and Compression Strength of Mortars Containing Unprocessed Waste Powdered Steel Slag

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