2013
DOI: 10.4028/www.scientific.net/amr.834-836.378
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Comparative Analysis of Steel Slag Characteristics and Treatment Process

Abstract: Steel slag is hydraulic cementing material, which is mainly applicable approach to the production of cement, admixture of high performance concrete, road engineering. But as a result of hydration expansion of the free calcium oxide and free magnesium oxide and dicalcium silicate morphological changes which is contained in slag cause poor stability of steel slag used in engineering, the steel slag utilization is very low. Therefore, the key technology of steel slag treatment process is to improve the stability … Show more

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Cited by 6 publications
(5 citation statements)
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“…The volume expansion of steel slag is mainly due to the f-CaO. The f-CaO can react with water and generate Ca(OH)2, which results in 97.8% volume expansion [27]. Meanwhile, the hydration speed of the f-CaO is slower than that of C3S and C2S.…”
Section: Soundness Of Ssupmentioning
confidence: 99%
See 1 more Smart Citation
“…The volume expansion of steel slag is mainly due to the f-CaO. The f-CaO can react with water and generate Ca(OH)2, which results in 97.8% volume expansion [27]. Meanwhile, the hydration speed of the f-CaO is slower than that of C3S and C2S.…”
Section: Soundness Of Ssupmentioning
confidence: 99%
“…This means that the volume expansion of the f-CaO occurs when the cement paste hardens, which can The volume expansion of steel slag is mainly due to the f-CaO. The f-CaO can react with water and generate Ca(OH) 2 , which results in 97.8% volume expansion [27]. Meanwhile, the hydration speed of the f-CaO is slower than that of C 3 S and C 2 S. This means that the volume expansion of the f-CaO occurs when the cement paste hardens, which can be detrimental to the volume stability of the cement-based material.…”
Section: Soundness Of Ssupmentioning
confidence: 99%
“…These methods are quite mature and widely put into practice. In the preliminary treatment process, steel slag is broken into small particles under temperature stress or external force, saving the multi-stage crushing equipment [117]. Unfortunately, steel slag cannot be directly used in concrete after the preliminary treatment and requires further treatment to ensure volumetric stability [104].…”
Section: Treatment Methodsmentioning
confidence: 99%
“…According to the main smelting process, steel slag can be divided into basic oxygen furnace (BOF) slag (also known as converter slag) and electric furnace (EAF) slag [2]. The molten steel slag produced from the steelmaking furnace goes through different means of processing, such as hot steel slag splashing after crushing screening-magnetic separation process technology, fever steel slag treatment technology, rotary cylinder process technology [3], etc. Steel slag is a by-product of the steel industry [4]; its production is 15-20% of crude steel production and cumulative storage exceeds 1.2 billion tons in China [5].…”
Section: Introductionmentioning
confidence: 99%