Instant-chilled steel slag aggregate in concrete - strength related properties

Montgomery, Denis; Wang, George

doi:10.1016/0008-8846(91)90068-s

Cited by 52 publications

(18 citation statements)

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“…Some rod like AFt crystals interlude among the different particles and enhance the contacts of the solid phases which contributes a lot to the material's strength formation. At the same time a slight expansion is resulted by the formation of the AFt, this expansion can compensate the chemical shrinkage or dry shrinkage of the steel slag-fly ash-phosphogypsum by a certain extent, therefore, the fly ash always has good volume stability [18,19], so the steel slag-fly ash-phosphogypsum solidified material has a satisfying anti-cracking performance which is a very important character for the road base material to deduce the reflective cracking of the asphalt pavement.…”

Section: The Strength Formation Mechanism Of Steel Slag-fly Ash-phospmentioning

confidence: 97%

Investigation on the application of steel slag–fly ash–phosphogypsum solidified material as road base material

Shen

Zhou

et al. 2009

Journal of Hazardous Materials

233

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Section: The Strength Formation Mechanism Of Steel Slag-fly Ash-phospmentioning

confidence: 97%

Investigation on the application of steel slag–fly ash–phosphogypsum solidified material as road base material

Shen

Zhou

et al. 2009

Journal of Hazardous Materials

233

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“…As mentioned before, the cooling method used in slag processing has a significant impact on its resulting mineralogical properties (Montgomery and Wang 1992;Wang 1992;Shi 2002;Reddy et al 2006). For example, Reddy et al (2006) and γ).…”

Section: Steel-furnace Slag Processingmentioning

confidence: 99%

“…For this reason, the cooling conditions need to be controlled precisely when steel slag is cooled by water quenching. To prevent the explosion problem associated with the waterquenching method, an instant-chilling (also known as shallow-box chilling) method has been developed to cool steel slag in Japan recently (Montgomery andWang 1992, Shi 2004). In this method, the molten slag is poured into shallow boxes, forming thin slag beds of 10 mm thickness.…”

Section: Steel-furnace Slag Processingmentioning

confidence: 99%

Use of Steel Slag in Subgrade Applications

Yıldırım¹,

Prezzi²

2011

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Steel slag is a by-product of steelmaking and refining processes. In 2006, 10-15 million metric ton of steel slag was generated in the U.S. Out of the total steel slag produced in the U.S. every year, about 50-70% is used as aggregate for road and pavement construction and approximately 15-40% is stockpiled in steel plants and eventually landfilled at slag disposal sites. Since current levels of steel slag stockpiling and landfilling are not sustainable, alternative geotechnical engineering applications for steel slag are being explored to alleviate the slag disposal problem and to help save dwindling natural resources. The main objectives of this research were to determine the geotechnical engineering properties of two types of steel slag generated from different steelmaking operations and to assess their potential use in subgrade stabilization and embankment construction. Samples of fresh and aged basic-oxygen-furnace (BOF) slag and of fresh electric-arc-furnace-ladle (EAF(L)) slag were characterized through a series of laboratory tests (specific gravity, grain-size analysis, X-ray diffraction, compaction, maximum and minimum density, large-scale direct shear, consolidated drained triaxial and swelling tests). The effects of gradation on the engineering properties of both fresh and aged steel slag samples were also investigated. Various mixtures of steel slag [BOF and EAF(L)] and Class-C fly ash were also investigated. The mixtures were prepared by adding 5 and 10% Class-C fly ash (by weight) to aged BOF slag and 5, 10 and 20% Class-C fly ash (by weight) to fresh EAF(L) slag. Unconfined compression tests were performed after various curing times to evaluate the strength gain characteristics of the mixtures. Long-term swelling tests were performed for compacted mixtures of both fresh and aged BOF slag and 10% Class-C fly ash (by weight) and for compacted mixtures of fresh EAF(L) slag and 5, 10 and 20% Class-C fly ash (by weight). The effect of adding 10% ground rubber (by weight) to fresh and aged BOF slag on the long-term swelling behavior of the mixtures was also investigated. The optimum moisture content and maximum dry unit weight of BOF slag were in the ranges of 4-8% and 19.5-21.8 kN/m 3 , respectively. The critical-state friction angle of fresh and aged BOF slags was in the 45.3°-48.1° range according to large-scale direct shear test results. Based on isotropically consolidated drained triaxial test (CIDTX) results, the peak friction angles of aged BOF slag (with minus 9.5 mm gradation) samples prepared at 90% relative compaction were equal to 47.3°, 45.2° and 43.5° at effective confining stresses of 50, 110 and 200 kPa, respectively. The optimum moisture content and maximum dry unit weight of EAF(L) slag were in the ranges of 10-13% and 16.8-20.0 kN/m 3 , respectively. The critical-state friction angle of fresh EAF(L) slag was equal to approximately 40.6° according to large-scale direct shear tests results. Compacted mixtures of both Class-C fly ash and BOF slag and of Class-C fly ash and EAF(L) slag sho...

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“…Although the chemical composition of the material may vary slightly because of its production process, it is a by-product of relatively good homogeneity compared to other by-products and presents good properties when considered as aggregate (Anastasiou and Papayianni, 2006). EAF slags have been considered unsuitable for concrete production by some countries owing to the risk of expansion (Akinmusuru, 1991), while in other cases they are considered as good-quality aggregates for concrete manufacture (Montgomery and Wang, 1991;State of Ohio, 2002). This is due to the free magnesia content, which varies according to the steel production process and the quality of lime used.…”

Section: Introductionmentioning

confidence: 98%

Concrete incorporating high-calcium fly ash and EAF slag aggregates

Papayianni

Anastasiou

2011

Magazine of Concrete Research

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Concrete mixtures with high volumes of electric arc furnace slag as aggregates and high-calcium fly ash as part of the binding system were produced and tested for their properties. The properties tested included strength development, microstructure and abrasion resistance, and the results were compared to those of conventional concrete. Results showed that compressive strength levels equal to or higher than those of conventional concrete can be achieved by using more than 90% by mass industrial by-products in the concrete mixture. These concretes of greater unit weight have shown very good aggregate-matrix transition zone and abrasion resistance, which makes them particularly suitable for pavement applications. The possibility of heavy metals leaching was also tested using a tank-leaching test, which showed minimal risk from the incorporation of electric arc furnace slag and high-calcium fly ash in concrete.

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Instant-chilled steel slag aggregate in concrete - strength related properties

Cited by 52 publications

References 1 publication

Investigation on the application of steel slag–fly ash–phosphogypsum solidified material as road base material

Investigation on the application of steel slag–fly ash–phosphogypsum solidified material as road base material

Use of Steel Slag in Subgrade Applications

Concrete incorporating high-calcium fly ash and EAF slag aggregates

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