Pilot-Scale Reconstruction of Steel Slag with Electric Arc Furnace Slag and Coal Cinder

To realize the industrial application of online reconstruction technique of steel slag, a pilot-scale reconstruction research of steel slag (SS) with electric arc furnace slag (EAFS) and coal cinder (CC) and its mechanism were investigated. The results show that after reconstruction, the free-CaO content of reconstructed steel slag (RSS) is reduced. XRD analysis indicates that the reconstruction reaction can promote to create more active cementitious minerals (C2S, C3S, C6AF2 and C6A2F) in RSS. Composition adjusting materials formula composing of EAFS and CC at the ratio of 70:30 is optimum, which can meet the standard of the first grade steel slag powder according to Chinese National Standards GB/T 20491-2006.

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Utilization of Giad Steel Slag as Partial Replacement for Coarse Aggregates in Concrete

FES Journal of Engineering Sciences ◽

10.52981/fjes.v9i2.677 ◽

2021 ◽

Vol 9 (2) ◽

pp. 53-57

Author(s):

Osama Daoud ◽

Muntasir Ibrahim

Keyword(s):

Flexural Strength ◽

Waste Product ◽

Steel Slag ◽

Electric Arc Furnace ◽

Electric Arc ◽

Partial Replacement ◽

Arc Furnace ◽

Coarse Aggregates ◽

Electric Arc Furnace Slag ◽

Furnace Slag

This research paper focuses on the possibility of utilization of Giad electric arc furnace slag (GEAFS) as a partial replacement for coarse aggregates in concrete, without compromising on its workability and strength. The electric arc furnace slag is a waste product from the steel manufacturing which may be used as partial replacement of coarse aggregates in concrete. This paper presents an experimental study on fresh and hardened properties of concrete containing steel slag aggregates. Slump, as well as strength properties of concrete prepared with natural coarse aggregate, partially replaced by the GEAFS in different proportions varying from 25 %, 50 % and 75 %. The GEAFS concrete shows marginal decrease in slump for the further replacement. Compressive, split and Flexural strength of the GEAFS concrete have been increased for the GEAFS addition. Highest compressive, tensile and flexural strength have been achieved by the mix containing 50 % GEAFS coarse aggregates. Using of steel slag will result in decrease of waste landfilling, and improving environmental condition.

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Use of electric arc furnace slag for producing concrete paving blocks

Ambiente Construído ◽

10.1590/s1678-86212019000200305 ◽

2019 ◽

Vol 19 (2) ◽

pp. 21-32 ◽

Cited By ~ 1

Author(s):

Carmenlucia Santos Giordano Penteado ◽

Beatriz Leão Evangelista ◽

Gisleiva Cristina dos Santos Ferreira ◽

Pedro Henrique Andrade Borges ◽

Rosa Cristina Cecche Lintz

Keyword(s):

Compressive Strength ◽

Water Absorption ◽

Steel Slag ◽

Electric Arc Furnace ◽

Electric Arc ◽

Arc Furnace ◽

Natural Aggregate ◽

Technical Requirements ◽

Electric Arc Furnace Slag ◽

Furnace Slag

Abstract In this study the electric arc furnace slag was used as coarse natural aggregate substitute in concrete paving blocks production. The concrete mixture was defined by using weight proportions in the ratio of 1:2:3:0.51 (cement:sand:coarse aggregate:water) in order to obtain a compressive strength of 35 MPa. Four groups of concrete were prepared: a reference recipe and three others with the slag replacing the natural aggregate in the proportions of 25%, 50% and 75%. The compressive strength was not influenced by the slag content; however, it was influenced by the curing age, as the sample with 75% of slag addition had its compressive strength increased by 13.5% from 7 to 56 days. Water absorption presented a slightly reduction with slag addition. The results of compressive strength and water absorption met the Brazilian technical requirements, making the paving blocks suitable for use in light vehicle traffic. The results obtained in this study highlight the influence of the production process in the final quality of the steel slag, and the need of stablishing technical and environmental requirements to guide and promote the safe use of electric arc furnace slag in concrete.

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