The recycling effect of BOF slag in the portland cement properties

Carvalho, S.Z.; Vernilli, Fernando; Almeida, Bruno Vidal de; DeMarco, Matt; Silva, S.N.

doi:10.1016/j.resconrec.2017.08.021

Cited by 85 publications

(29 citation statements)

References 20 publications

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“…The replacement of coarse and fine aggregates with steelmaking slag found that the optimum percentage of fine and coarse aggregate was 40% and 30%, respectively (Subathra et al, 2014). The type of steelmaking slag is not specified in A similar study looked at the influence of adding BOS slag instead of BF slag (Carvalho et al, 2017), although BF slag was still included. It was observed that initially after a period of 28 days the mechanical strength increased (25%), however, after 91 days, the mechanical strength gain decreased (5%).…”

Section: Concretementioning

confidence: 99%

See 1 more Smart Citation

The recycling and reuse of steelmaking slags — A review

Fisher

Barron

2019

Resources, Conservation and Recycling

196

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Section: Concretementioning

confidence: 99%

“…The use of BOS slag also has economic and environmental benefits. Therefore the replacement of BF slag as aggregate is a viable option (Carvalho et al, 2017).…”

Section: Concretementioning

confidence: 99%

The recycling and reuse of steelmaking slags — A review

Fisher

Barron

2019

Resources, Conservation and Recycling

196

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“…It is well known that production of cement emits a significant amount of CO2 to the atmosphere. Therefore, researchers have been working since the past few decades on various industrial by-products such as blast furnace slag, fly ash, steel slag, copper slag, sugarcane bagasse ash, ladle furnace slag and basic oxygen furnace slag as SCM during (Das et al, 2007;Shi & Qian, 2000;Loh et al, 2013;Shi et al, 2008;Rodriguez et al, 2009;Carvalho et al, 2017). The utilization of blast furnace slag as a SCM in concrete reduces the heat of hydration and improves the long-term strength and durability properties (Das et al, 2007).…”

Section: Performance Of Ground Fns As Binder In Concretementioning

confidence: 99%

Value added utilization of by-product electric furnace ferronickel slag as construction materials: A review

Saha

Khan

Sarker

2018

Resources, Conservation and Recycling

140

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This paper reviews the potential use of electric furnace ferronickel slag (FNS) as a fine aggregate and binder in Portland cement and geopolymer concretes. It has been reported that the use of FNS as a fine aggregate can improve the strength and durability properties of concrete. Use of some FNS aggregates containing reactive silica may potentially cause alkalisilica reaction (ASR) in Portland cement concrete. However, the inclusion of supplementary cementitious materials (SCM) such as fly ash and blast furnace slag as partial cement replacement can effectively mitigate the ASR expansion. When finely ground FNS is used with cement, it shows pozzolanic reaction, which is similar to that of other common SCMs such as fly ash. Furthermore, 20% FNS powder blended geopolymer showed greater strength and durability properties as compared to 100% fly ash based geopolymers. The utilization of raw FNS in pavement construction is reported as a useful alternative to natural aggregate. Therefore, the use of by-product FNS in construction industry will be a valuable step to help conservation of natural resources and add sustainability to infrastructures development. This paper presents a comprehensive review of the available results on the effects of FNS in concrete as aggregate and binder, and provides some recommendations for future research in this field.

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“…For instance, slag, which is widely used in the cement industry, reduces the environmental and economical impacts of cement production; this impact reduction can be obtained, also enhancing the hydraulicity and the grain sizes of spinel phases of the basic oxygen furnace (BOF) slag . Recently, the influence of the partial replacement of BF slag by BOF slag for producing portland cement has been assessed . By replacing portland cement with slag, cement in concrete can save up to 59% of the embodied CO 2 emissions and 42% of the energy required to manufacture concrete and its materials…”

Section: Introductionmentioning

confidence: 99%

Scenario Analyses for By‐Products Reuse in Integrated Steelmaking Plants by Combining Process Modeling, Simulation, and Optimization Techniques

Matino

Branca

Fornai

et al. 2019

steel research int.

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Steel industry consumes resources and produces important amounts of by‐products. Process modeling, simulation, and optimization can address field tests for maximizing by‐products reuse. The improvements of a long‐lasting research activity on slag reuse by deepening aspects, only marginally considered in the past, are presented herein. An Aspen Plus‐based model is developed to assess different basic oxygen furnace slag pretreatment configurations or involved techniques. A previously developed superstructure is upgraded, considering more slag pretreatments and qualities. A simplified Aspen Plus‐based model of mixing of the different pretreated by‐products is applied to evaluate the chemical composition of pellets in each scenario, starting from the computed mixtures. The developed tools are exploited to get a holistic view of steelmaking by‐products reuse and make multiobjective optimization studies which provide different results. For instance, the mixture to be pelletized completely changes if final product quality is (or not) considered in the optimization. Regarding the optimization combining all the considered objective functions, the best slag treatment includes a wet high‐intensity magnetic separation stage, and only some slag qualities are considered in the pellet mixture. A preliminary economic analysis confirms that an optimal combination of internal and external recoveries of by‐products can produce noteworthy revenues.

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The recycling effect of BOF slag in the portland cement properties

Cited by 85 publications

References 20 publications

The recycling and reuse of steelmaking slags — A review

The recycling and reuse of steelmaking slags — A review

Value added utilization of by-product electric furnace ferronickel slag as construction materials: A review

Scenario Analyses for By‐Products Reuse in Integrated Steelmaking Plants by Combining Process Modeling, Simulation, and Optimization Techniques

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