Durability of concrete made with EAF slag as aggregate

Manso, Juan Manuel García; Polanco, J.A.; Losañez, Milagros; González, J.

doi:10.1016/j.cemconcomp.2006.02.008

Cited by 285 publications

(121 citation statements)

References 9 publications

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“…The basic physical properties as well as the quality of the BOF slag for railway ballast material were evaluated in six test methods for determining: (1) unit weight of aggregate (ASTM C29 [25]), (2) resistance to abrasion of coarse aggregate (ASTM C535 [26]), (3) hardness (ASTM D2240 [27]), (4) compressive strength (ASTM C170 [28]), (5) immersion expansion (JIS A 5015 [29]), (6) contents of harmful materials (ASTM C142 [30], ASTM C123 [31], AASHTO T 189-70 [32]). …”

Section: Test Methods and Standardsmentioning

confidence: 99%

“…Namely, BF iron slag (air cooled BF slag and granulated BF slag) has long been utilized as a construction material (aggregate and concrete binder etc. ), and steel slag (BOF slag and EAF oxidizing slag) has been the subject of numerous research efforts with the aim of used as aggregates for road, embankment, reinforced concrete elements, or high-performance concrete with good bond with reinforcements, eco-friendly prestressed concrete sleeper [1][2][3][4]. However, steel slag still has not been widely utilized as aggregate for concrete production limited by Construction Specification, due to its unqualified properties with the specification.…”

Section: Introductionmentioning

confidence: 99%

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A Feasibility Study on the Application of Basic Oxygen Furnace (BOF) Steel Slag for Railway Ballast Material

et al. 2018

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Railway ballast, for which natural crushed stone aggregates have been generally used, is an essential track component for the distribution of train loads along the rails and sleepers to the roadbed. However, the use of natural crushed stone aggregate causes environmental destruction as well as dust production in train service. This paper evaluates the feasibility of using the basic oxygen furnace (BOF) steel slag as railway ballast material. A series of physical and chemical quality tests are performed to investigate the characteristics of the materials associated with the effect of aging period due to the remaining free CaO and MgO in the BOF steel slag. Three different aging periods (i.e., 0, 3, and 6 months) are used to compare with various standards and the properties of the crushed stone aggregates. It is demonstrated that the physical and chemical properties of the BOF steel slag with different aging periods satisfy all requirements of standards sufficiently. Especially, the BOF steel slag without aging (i.e., 0 month) provides the similar physical and chemical properties, when compared to the BOF steel slag with aging (i.e., 3 and 6 months). Thus, it is possible to apply the BOF steel slag regardless of aging periods to the railway ballast materials instead of natural crushed stone aggregates.

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Section: Test Methods and Standardsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Feasibility Study on the Application of Basic Oxygen Furnace (BOF) Steel Slag for Railway Ballast Material

et al. 2018

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“…Other authors found that cement-based materials with good properties could be obtained when SS are employed as partial replacement of sand fines with optimized replacement ratios [3,4,[14][15][16][17][18]. In addition, Shi [19,20] observed that ladle slag fines showed significant cementitious behaviour in the presence of an alkaline activator and that the cementitious properties became more evident decreasing the size of the slag particles.…”

Section: Introductionmentioning

confidence: 99%

Production and Compression Strength of Mortars Containing Unprocessed Waste Powdered Steel Slag

et al. 2017

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This paper deals with the production of mortars prepared using a commercial CEMIIB-S 42.5N cement, a natural aggregate, steelmaking slag, a superplasticizer and water. The as-received unprocessed steel slag was milled by a hammer mill and then sieved to obtain batches with different maximum particle size. Each batch was used, together with the other components, in the production of mortars which were tested, by compression and water absorption, after different aging times in order to evaluate their long term stability. Several slag-free samples were also prepared as reference materials. All mortars were prepared with fixed aggregate/cement ratio (6/1), superplasticizer/cement ratio (s/c) and water/cement ratio (w/c). It has been demonstrated that an adequate protocol for the preparation and the use of slag containing particles with 2500 µm maximum size lead to the production of materials with mechanical properties suitable for civil engineering applications after aging for 28, 90 and 180 days. However, samples containing slag particles with size equal or greater than 1000 µm display a decay of mechanical properties after longer aging in water or after accelerated aging.

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“…Considered as waste for a long time, this by-product is increasingly used in civil engineering applications as its valorization allows a number of benefits such as the conservation of natural resources, the reduction of waste storage volumes, the decrease of material construction cost and transport demands and the promotion of local economy [2][3][4]. Today, EAF slag is partially recycled as aggregates for earthworks [5,6], for asphalt mixtures [7,8], for mortar and concrete [9,10] and for clinker manufacture [6]. But, recycling this by-product in such applications depends not only on its aptitude to reach technical specifications but also on its environmental compatibility including the leachability of harmuful elements like chromium, molybdenum and vanadium [4,11,12,13].…”

Section: Introductionmentioning

confidence: 99%

Efficiency assessment of EAF-S processing for recycling purpose by LCA method

2016

IJRCMCE

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Abstract-EAF slag is a by-product generated by steel production in an electric arc furnace (EAF). Generally, this by-product is not or less recycled in a next steel production and stored in the form of a dump (which takes increasingly space), because of the presence of significant amounts of impurities. Many studies have shown that slag may substitute for natural aggregate in the construction sector. But, because of the presence of heavy metals, EAF slag must be processed for the production of recyclable material regarding environmental recommendation for road construction. This paper presents the study of the environmental efficiency assessment of EAF slag processing for recycling using life cycle assessment (LCA). Two processes are compared. The efficiency assessment of the processes is based on the environmental "quality" of the produced material as well as on the environmental impact of the process. Thus technical characterization of the EAF slag was performed to verify its environmental "quality" based on its conformity to French standards and rules for use as road material. So, leaching tests were done, as the main property considered for recycling waste materials, in France, is their potential emission of pollutants to water. All collected experimental data are then used in order to compare the various impacts obtained for each process and discuss the interest of various solutions considering both toxicity and ecotoxicity indicators.

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Durability of concrete made with EAF slag as aggregate

Cited by 285 publications

References 9 publications

A Feasibility Study on the Application of Basic Oxygen Furnace (BOF) Steel Slag for Railway Ballast Material

A Feasibility Study on the Application of Basic Oxygen Furnace (BOF) Steel Slag for Railway Ballast Material

Production and Compression Strength of Mortars Containing Unprocessed Waste Powdered Steel Slag

Efficiency assessment of EAF-S processing for recycling purpose by LCA method

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