scholarly journals Sustainable Recycling of Electric Arc Furnace Steel Slag as Aggregate in Concrete: Effects on the Environmental and Technical Performance

2021 ◽  
Vol 13 (2) ◽  
pp. 521
Author(s):  
Alessandra Diotti ◽  
Luca Cominoli ◽  
Adela Perèz Galvin ◽  
Sabrina Sorlini ◽  
Giovanni Plizzari
Keyword(s):  
Research Work ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Partial Substitution ◽  
Hardened Concrete ◽  
Arc Furnace ◽  
Sustainable Concrete ◽  
Concrete Production ◽  
Furnace Steel

The aim of this research work was the evaluation of the feasibility to utilize industrial by-products, such as electric arc furnace steel slags, for sustainable concrete production. The paper evaluated the environmental and mechanical properties of steel slags and concrete, respectively. Specifically, the release of contaminants from steel slags was investigated by leaching test and the properties of fresh and hardened concrete were evaluated for a concrete mixture designed with a partial substitution (30%) of natural coarse aggregates with electric arc furnace steel slags. The results show that the concentrations of pollutants were lower than the legal limits imposed by the Ministerial Decree 186/2006 and the addition of steel slag can enhance the mechanical performance of concrete. The compressive strength of cubic specimens was also measured after different cycles of alternate wetting–drying. The steel slag incorporation results in a stiffness comparable to that of a traditional concrete. Overall, the mechanical and leaching characterization has shown that the reuse of electric arc furnace steel slags for sustainable concrete production is feasible and reliable.

scholarly journals Rheological Characterization of Warm-Modified Asphalt Mastics Containing Electric Arc Furnace Steel Slags

2016 ◽  
Vol 2016 ◽  
pp. 1-11 ◽  
Author(s):  
M. Pasetto ◽  
A. Baliello ◽  
G. Giacomello ◽  
E. Pasquini
Keyword(s):  
Environmental Sustainability ◽  
Complex Modulus ◽  
Steel Slag ◽  
Rheological Behaviour ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Partial Substitution ◽  
Arc Furnace ◽  
Modified Asphalt ◽  
Furnace Steel

The environmental sustainability of road materials and technologies plays a key role in pavement engineering. In this sense, the use of Warm Mix Asphalt (WMA), that is, a modified asphalt concrete that can be produced and applied at lower temperature, is considered an effective solution leading to environmental and operational benefits. The environmental sustainability of WMA can be further enhanced with the inclusion of steel slag in partial substitution of natural aggregates. Nevertheless, such innovative material applied at lower temperatures containing warm additives and steel slag should be able to guarantee at least the same performance of traditional hot mix asphalts, thus assuring acceptable mechanical properties and durability. Therefore, the purpose of this study is to investigate the rheological behaviour of bituminous mastics obtained combining a warm-modified binder and a filler (material passing to 0.063 mm) coming from electric arc furnace steel slag. To evaluate the influence of both warm additive and steel slag, a plain binder and limestone filler were also used for comparison purposes. Complex modulus and permanent deformation resistance of bitumens and mastics were assessed using a dynamic shear rheometer. Experimental results showed that steel slag warm mastics assure enhanced performance demonstrating promising applicability.

Environmental Impacts of Asphalt Mixes with Electric Arc Furnace Steel Slag

2011 ◽  
Vol 40 (4) ◽  
pp. 1153-1161 ◽  
Author(s):  
Radmila Milačič ◽  
Tea Zuliani ◽  
Tina Oblak ◽  
Ana Mladenovič ◽  
Janez Šč ančar
Keyword(s):  
Environmental Impacts ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Asphalt Mixes ◽  
Furnace Steel

Effect of basicity on cementitious activity of modified electric arc furnace steel slag

2019 ◽  
Vol 116 (2) ◽  
pp. 217
Author(s):  
Xiang Lu ◽  
Wenbin Dai ◽  
Xiaoming Liu ◽  
Daqiang Cang ◽  
Liang Zhou
Keyword(s):  
Raman Spectra ◽  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Nonbridging Oxygen ◽  
Arc Furnace ◽  
Polymerization Degree ◽  
Furnace Steel ◽  
Basicity Index ◽  
Cementitious Activity

Electric arc furnace steel slag was modified by wastes in hot-stage process with the aim to improve the cementitious activity. Effect of basicity on cementitious activity of modified steel slag was investigated in this research. The modified slag was characterized by XRD, DTA and Raman spectra techniques to investigate the correlations between structural features and the cementitious activity. The results showed that modified steel slag with a basicity index of 1.67 possessed the highest activity index, 107%, due to the precipitation of Belite, high content of amorphous phase and low polymerization degree. The polymerization degree of modified slag was demonstrated by nonbridging oxygen per tetrahedrally coordinated cations value which was calculated through curve-fitted Raman spectra. The value of modified slag increased as the basicity promoted from 1.05 to 1.67, indicating a lower degree of polymerization. Modified slag with a basicity index of 1.86 possessed the poor cementitious activity mainly because of the significant decrease of glass phase content.

scholarly journals PROPERTIES OF HIGH STRENGTH CONCRETE CONTAINING ELECTRIC ARC FURNACE STEEL SLAG AGGREGATE

2014 ◽  
Vol 42 (3) ◽  
pp. 582-608
Author(s):  
Mohammed Emad Abdelazzzim ◽  
Mohammed Abdelsame Eid ◽  
Noby Mohammed Hassan
Keyword(s):  
High Strength Concrete ◽  
Steel Slag ◽  
High Strength ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Strength Concrete ◽  
Furnace Steel

Valorisation of electric arc furnace steel slag as raw material for low energy belite cements

2011 ◽  
Vol 196 ◽  
pp. 287-294 ◽  
Author(s):  
R.I. Iacobescu ◽  
D. Koumpouri ◽  
Y. Pontikes ◽  
R. Saban ◽  
G.N. Angelopoulos
Keyword(s):  
Steel Slag ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Low Energy ◽  
Raw Material ◽  
Arc Furnace ◽  
Furnace Steel
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