A Fundamental Study on the Steel Slag Aggregate for Concrete

Moon, Han-Young; Yoo, Jung Han; Kim, Seong Soo

doi:10.1080/12269328.2002.10541186

Cited by 44 publications

(14 citation statements)

References 2 publications

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“…Because of the potential for significant expansion, some researchers have proposed pretreating the SFS prior to its use as an aggregate in bound applications, such as by outdoor weathering [56,79,99,[309][310][311], carbonation [114,121,124,152], steam aging [79,129,311,312], and so forth. The expansion tests detailed above are suitable candidates to confirm the degree of reaction or expansion before using the SFS.…”

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confidence: 99%

A Review of the Influence of Steel Furnace Slag Type on the Properties of Cementitious Composites

Brand

Fanijo

2020

Applied Sciences

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The type of steel furnace slag (SFS), including electric arc furnace (EAF) slag, basic oxygen furnace (BOF) slag, ladle metallurgy furnace (LMF) slag, and argon oxygen decarburization (AOD) slag, can significantly affect the composite properties when used as an aggregate or as a supplementary cementitious material in bound applications, such as concretes, mortars, alkali-activated materials, and stabilized soils. This review seeks to collate the findings from the literature to express the variability in material properties and to attempt to explain the source(s) of the variability. It was found that SFS composition and properties can be highly variable, including different compositions on the exterior and interior of a given SFS particle, which can affect bonding conditions and be one source of variability on composite properties. A suite of tests is proposed to better assess a given SFS stock for potential use in bound applications; at a minimum, the SFS should be evaluated for free CaO content, expansion potential, mineralogical composition, cementitious composite mechanical properties, and chemical composition with secondary tests, including cementitious composite durability properties, microstructural characterization, and free MgO content.

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confidence: 99%

A Review of the Influence of Steel Furnace Slag Type on the Properties of Cementitious Composites

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Fanijo

2020

Applied Sciences

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“…This feature provides for an excellent bond with the cement paste matrix. Several aging methods are currently used to reduce the expansibility of steel slag aggregate, namely the air aging, hot water aging, and steam aging [19]. In this research, the air aging method was used (steel slag was left out in the open to enable weathering), as this method is easier and more cost effective.…”

Section: Methodsmentioning

confidence: 99%

High performance concrete with steel slag aggregate

2014

JCE

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High performance concrete with steel slag aggregate The effect of the steel slag aggregate aging on mechanical properties of the high performance concrete is analysed in the paper. The effect of different aging periods of steel slag aggregate on mechanical properties of high performance concrete is studied. It was observed that properties of this concrete are affected by the steel slag aggregate aging process. The compressive strength increases with an increase in the aging period of steel slag aggregate. The flexural strength, Young's modulus, and impact strength of concrete, increase at the rate similar to that of the compressive strength. The workability and the abrasion loss of concrete decrease with an increase of the steel slag aggregate aging period.

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“…European statistical data from 2016 11 shows that more than 20% of the annual converter steel slag production has no use (intermediate storage or landfilled), while 46% has a low-added value application as road base material. Because it is available in large quantities and contains mineral phases also present in Portland cement, converter slag has been tested as a building material 12,13,14 However, the presence of free lime (CaO) and the volume expansion associated with its delayed hydration often prevent this type of application. 15 Milling converter slag to cement fineness, thereby exposing the free lime for hydration could solve the expansion problem.…”

Section: Abstract Air Granulation Converter Steel Slag Minermentioning

confidence: 99%

The mineralogy of air granulated converter slag

Schollbach

Ahmed

Laan

2020

Int J Ceramic Engine & Sci

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Converter slag, also known as Basic Oxygen Furnace slag, is a by-product of steelmaking that is produced in large quantities worldwide. It currently has few applications, because the presence of free lime often prevents the use as aggregate, while the low reactivity makes it undesirable as a cement replacement. Air granulation is a promising way to increase the reactivity of converter slag and enable recycling as a cement replacement and this is the first in-depth characterization of air granulated steel slag. In this study converter slag was separated into different fractions (0.25-0.5 mm, 0.5-1 mm, 1-2 mm, 2-4 mm) after air granulation to study the influence of size and therefore cooling speed on its mineralogy. The air granulated slag fractions were characterized using X-ray fluorescence, quantitative X-Ray diffraction, large area phase mapping based on scanning electron microscopy, and energy-dispersive X-ray spectroscopy as well as leaching behavior. The results show that the main minerals in air granulated converter slag are the same as in industrially cooled slag, but that additional perovskite was formed, which has not been reported before. All fractions contained large phenocrysts of Ca2SiO4 and Mg-wuestite surrounded by a dense matrix containing the other minerals. The three largest fractions are very similar to each other in chemical composition and microstructure, while the smallest fraction (0.25-0.5 mm) contains a higher content of Mg-wuestite even though the starting composition was the same. Free-lime is only present at the detection limit (0.1 ± 0.1 wt%) in all size fractions. The leaching of chromium and vanadium is greatly increased compared to standard cooled converter slag This article has been accepted for publication and undergone full peer review but has not been through the copyediting, typesetting, pagination and proofreading process, which may lead to differences between this version and the Version of Record. Please cite this article as

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A Fundamental Study on the Steel Slag Aggregate for Concrete

Cited by 44 publications

References 2 publications

A Review of the Influence of Steel Furnace Slag Type on the Properties of Cementitious Composites

A Review of the Influence of Steel Furnace Slag Type on the Properties of Cementitious Composites

High performance concrete with steel slag aggregate

The mineralogy of air granulated converter slag

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