Leaching characteristics of steel slag components and their application in cementitious property prediction

Li, Zaibo; Zhao, Sanyin; Zhao, Xiaona; He, Tusheng

doi:10.1016/j.jhazmat.2011.07.069

Cited by 28 publications

(8 citation statements)

References 20 publications

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“…Trend analysis was performed on data for pH, alkalinity and Ca at both the Dene Burn and Howden Burn. It would be expected that the heaps surrounding these watercourses would become increasingly leached and the slag depleted of free lime and other reactive oxides (Li et al 2012 ) and metals. Over time, it may be anticipated that the resulting hydro-geochemistry of leachate would exhibit an asymptotic decay towards baseline conditions of pH, Ca and alkalinity as is apparent in analogous cases of pollution from abandoned mines (Younger et al 2005 ).…”

Section: Discussionmentioning

confidence: 99%

Long-term evolution of highly alkaline steel slag drainage waters

Riley

Mayes

2015

Environ Monit Assess

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The disposal of slag generated by the steel industry can have negative consequences upon the surrounding aquatic environment by the generation of high pH waters, leaching of potentially problematic trace metals, and rapid rates of calcite precipitation which smother benthic habitats. A 36-year dataset was collated from the long-term ambient monitoring of physicochemical parameters and elemental concentrations of samples from two steel slag leachate-affected watercourses in northern England. Waters were typified by elevated pH (>10), high alkalinity, and were rich in dissolved metals (e.g. calcium (Ca), aluminium (Al), and zinc (Zn)). Long-term trend analysis was performed upon pH, alkalinity, and Ca concentration which, in addition to Ca flux calculations, were used to highlight the longevity of pollution arising as a result of the dumping and subsequent leaching of steel slags. Declines in calcium and alkalinity have been modest over the monitoring period and not accompanied by significant declines in water pH. If the monotonic trends of decline in alkalinity and calcium continue in the largest of the receiving streams, it will be in the region of 50–80 years before calcite precipitation would be expected to be close to baseline levels, where ecological impacts would be negligible.Electronic supplementary materialThe online version of this article (doi:10.1007/s10661-015-4693-1) contains supplementary material, which is available to authorized users.

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Section: Discussionmentioning

confidence: 99%

Long-term evolution of highly alkaline steel slag drainage waters

Riley

Mayes

2015

Environ Monit Assess

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“…Steel slag is a by-product of steel scrap, pig iron, or both [4][5][6]. Steel slag production occurs in electric arc furnaces, induction furnaces, ladle furnaces, and basic oxygen furnaces [7][8][9]. Steel slag contaminates the environment [10].…”

Section: Introductionmentioning

confidence: 99%

A Review of Steel Slag as a Substitute for Natural Aggregate Applied to Concrete Columns

Ali,

Abdul-Hameed

2024

J. eng. sustain. dev.

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There are severe ecological imbalances from both carbon emissions and sand mining. Steel slag can be used as an aggregate in concrete to enhance the environment and conserve natural resources because of the impact of depleting resources. The paper's main aim is to investigate the appropriateness of steel slag as an aggregate substitute and determine its impact on the behavior and durability properties of columns subjected to various circumstances and loads. After discussing slag and its properties, its effects on plain concrete were reviewed, followed by its effects on concrete columns. Previous studies indicate that columns made with steel slag aggregate concrete have comparable initial stiffness, strength, and flexibility as regular concrete. For columns with fine steel slag aggregates, the conventional section design approach can be used as an option for the design method. The European standard for stub columns filled with steel slag aggregate concrete under compression is more accurate than the American standard, which is circumspect.

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“…For example, steel slag cannot be directly reused in cement or concrete industry and road construction for potential dangers of instability and alkali aggregate reaction resulted from existence of free CaO and free MgO. [8][9][10] The ceramics appear a promising solution because it is able to convert, at a relatively low cost, complex chemical compositions into stable crystals or glass phase in ceramics. [11][12][13][14][15][16][17][18] Moreover, ceramics industry also has the ability to consume these bulk solid wastes besides cement and concrete industries.…”

Section: Introductionmentioning

confidence: 99%