Development of large steelmaking slag blocks using a new carbonation process

Isoo, Tsuneo; Takahashi, Tatsuhito; Okamoto, Naohisa; Fukuhara, Minoru

doi:10.1680/adcr.2000.12.3.97

Cited by 25 publications

(9 citation statements)

References 10 publications

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“…by (hydraulic) compaction; and (3) CO 2 curing in an autoclave (at elevated CO 2 pressure) or in a climate chamber (at low CO 2 pressure). In 1999 large porous blocks (1mx1mx1m) were made using only steelmaking slag and CO 2 [44]. The blocks were produced by moist carbonation in an airtight mold.…”

Section: Case 2: Carbonate Bonded Compactsmentioning

confidence: 99%

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Carbonate-bonded construction materials from alkaline residues

Nielsen¹,

Baciocchi²,

Costa³

et al. 2017

RILEM Tech Lett

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Accelerated carbonation is a rapidly developing technology that is attracting attention as it uses CO 2 as a binder to make construction materials. Originally stemming from geochemical and environmental research into CO 2 sequestration or waste remediation, accelerated carbonation has been developed into a technology that enables to transform alkaline precursors into products that meet technical requirements for use as aggregates or shaped blocks. Alkaline precursors can be manufactured from primary resources or derived from industrial residues: a.o. metallurgical slags, incineration ashes and concrete recycling residues are prone to carbonate under controlled conditions. Moist carbonation of shaped Ca-silicate rich precursors at elevated curing temperature and CO 2 concentration or pressure has delivered the most promising results so far. This letter presents an overview of current accelerated carbonation approaches to make carbonate-bonded construction materials from alkaline residues. The general carbonation mechanism is explained and two application routes are exemplified: i.e. production of lightweight aggregates and compact blocks by accelerated moist carbonation.

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Section: Case 2: Carbonate Bonded Compactsmentioning

confidence: 99%

“…The compressive strength of the resulting blocks reached 18±3 MPa. The blocks were carbonated homogeneously and the CO 2 uptake was approximately 6 % [44]. The NKK corporation (presently JFE steel) started marketing these blocks under the registered trade nameMarine Blocks for constructing artificial reefs [52].…”

Section: Case 2: Carbonate Bonded Compactsmentioning

confidence: 99%

Carbonate-bonded construction materials from alkaline residues

Nielsen¹,

Baciocchi²,

Costa³

et al. 2017

RILEM Tech Lett

View full text Add to dashboard Cite

show abstract

“…However, steel slag has shown the potential to replace cement as an alternative binder if carbonation activation is performed (Mahoutian and Shao 2016). Isoo et al (2000) reported that a 1 m 3 slag block reached a compressive strength of 18.4 MPa after 12 days of carbonation for seaweed bed application. Stainless steel slag compacts exposed to carbon dioxide for one hour achieved a compressive strength of 9 MPa and a carbon dioxide uptake of D r a f t 18% (Johnson et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Pilot production of steel slag masonry blocks

2018

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Masonry blocks are usually made of Portland cement and cured by steam. This study explores the possibility of making masonry blocks using steel slag as binder and carbon dioxide as curing activator. By carbonation activation of steel slag blocks, carbon dioxide can be permanently sequestered in steel slag as calcium carbonates, leading to stronger and more durable construction blocks. In this paper, carbonated steel slag paste was first evaluated by thermogravimetry, derivative thermogravimetry, X-ray diffraction, carbon uptake, strength development and leaching tests. Based on the preliminary results, the full-size masonry blocks were fabricated using steel slag as the binder and granite as the aggregates. The physical properties and durability of full-size steel slag masonry blocks were then examined through their density, water absorption, moisture content, compressive strength and fire resistance. An economic analysis was performed and a carbon dioxide utilization capacity was estimated. This study demonstrates that production of steel slag masonry blocks by carbonation is an economically feasible way to utilize carbon dioxide.

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“…5% , but this kind of hydraulic steel slag stimulated amplification can be treated with a certain way [7]. In recent years, it has been widely used in the field of traditional building materials: production of steel slag cement, preparation of steel slag concrete, and backfilling and reinforcement of foundation [8,9]. According, to the research, the slurry can stimulate the potential activity of steel slag, and the slurry is also the ideal material for fixing CO2 and preparing slag products [10].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Microorganism Mineralized Steel Slag Cementing Material

Yi¹,

Qian²

2017

Topics in Intelligent Computing and Industry Design (ICID)

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In this paper, the steel slag-lime system was used to prepare steel slag products under the enzymatic action of microorganisms. The results showed that, after 3h carbonization, the compressive strength increased from 32.8MPa to 49.5MPa, the strength of steel slag products was improved obviously. By CT and other analytical tools, the mineralization depth of microorganism is obviously deepened, and the pore structure is optimized. The results show that the amount calcium carbonate significantly improved, the calcium carbonate filling in the pores around, the pore structure has been optimized, the strength has been improved. In addition, microorganisms have the role of loading and catalytic, on one hand, it can be a steady stream of carbon dioxide which transport it into the brick to happen sequestration, on the other hand, the secretion of the enzyme can significantly accelerate the hydration reaction rate of carbon dioxide, which will form more and more CO3 2-inside the brick, so a higher probability of Ca 2 + and CO3 2-combining to generate CaCO3.

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Development of large steelmaking slag blocks using a new carbonation process

Cited by 25 publications

References 10 publications

Carbonate-bonded construction materials from alkaline residues

Carbonate-bonded construction materials from alkaline residues

Pilot production of steel slag masonry blocks

Preparation and Performance of Microorganism Mineralized Steel Slag Cementing Material

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