Comparing Properties of Concrete Containing Electric Arc Furnace Slag and Granulated Blast Furnace Slag (original) (raw)
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Properties of High Strength Concrete Containing Electric Arc Furnace Steel Slag Aggregate
JES. Journal of Engineering Sciences
Steel slag is produced as by-product during the oxidation of steel pellets in an electric arc furnace. This by-product can be broken down to smaller sizes to be used as aggregates in asphalt and concrete. In the current research, locally produced steel slag in Egypt was used as a replacement of the natural aggregate for producing high strength concrete. Four groups consisted of twenty-four normal, high and ultra-high strength concrete mixtures with replacement percentages 0%, 33.33%, 66.67% and 100% by weight of the coarse aggregate with two cement contents (450 kg/m 3 and 600 kg/m 3) and three silica fume percentages (0%, 10% and 20%) were investigated. In addition, other three groups consists of six concrete mixes of cement contents 350 kg/m 3 and 450 kg/m 3 were cast to study the possibility of using the fine electric arc furnace steel slag particles as a replacement of the used natural fine aggregate in the concrete mixtures. The effect of the studied key parameters which are the replacement ratio of the used electric arc furnace steel slag (EAFSS), the cement content and the silica fume percentage on the volume weight, compressive strength, flexural strength, indirect tensile strength, static of elasticity modulus and Permeability coefficient were studied. The results indicated that the highest concrete strength was obtained for the mixtures possessed a percentage of 66.67% steel slag aggregates as a replacement of the coarse aggregate. Moreover, the replacement of the natural fine aggregate by the fine steel slag as well as the EAFSS coarse aggregate produced a high strength pervious porous concrete.
Eco-concrete with incorporation of blast furnace slag as natural aggregates replacement
Science and Technology of Materials, 2018
This study focused on studying the possibility of using concrete with incorporation of slag from blast furnace in the filling of short steel columns. The natural sand was totally or partially replaced by the sand slag in the composition of the concrete. The characterization of these concretes was made based on their physical properties (apparent and specific densities, porosity and fineness modulus), mechanical properties (compressive and tensile strengths) and the microstructure analysis by scanning electron microscopy (SEM). The comparison with the conventional concrete was made. The experimental results show that the percentages of sand slag on the concrete composition have an important effect on the enhancement of the mechanical proprieties. The comparison of the different determined characteristics shows the benefits of the use of sand slag in the concrete composition compared with the conventional concrete.
2010
The present paper deals with the use of industrial by-products from Electric Arc Furnace (EAF) for the partial replacement of natural aggregates commonly used to manufacture concrete. Three different grading of EAF granulated slag were considered. The rheological and mechanical properties of concrete manufactured with a partial replacement of natural aggregates with slag were determined. Dry shrinkage of hardened concrete was also evaluated. Results indicated that the maximum percentage of natural aggregate replaced with EAF granulated slag is about 15% in order to limit the superplasticizer dosage to attain the same workability class (S4) of the reference mixture at the end of the mixing procedure. The higher the percentage of granulated slag, the higher the specific mass, the elastic modulus in compression and the compressive strength of the concrete. On the other hand, dry shrinkage of the concrete increases by adding a greater amount of EAF granulated slag. As a consequence of the experimental results use of EAF granulated slag in concrete production is limited for the higher specific mass (higher dead loads and seismic vulnerability of the structures) and the higher sensitivity to crack (higher elastic modulus and dry shrinkage) with respect concrete manufactured with natural aggregates only.
Utilization Of Blast Furnace Slag In Concrete - IRE Journals
2019
To meet the global demand of concrete in the future, it is becoming a more challenging task to find suitable alternatives to natural aggregates for preparing concrete, hence the use of alternative sources for natural aggregates is becoming increasingly important. Slag is a co-product of the iron making process. Iron cannot be prepared in the blast furnace without the production of its co-product i.e. blast furnace slag. The use of blast furnace slag aggregates in concrete by replacing natural aggregates is a most promising concept because its impact strength is more than the natural aggregate. Steel slag aggregates are already being used as aggregates in asphalt paving road mixes due to their mechanical strength, stiffness, porosity, wear resistance and water absorption capacity.
Properties of concretes with Black/Oxidizing Electric Arc Furnace slag aggregate
Cement and Concrete Composites, 2013
The aim of this work is to comprehensively investigate the possibility of partially substituting natural aggregates with Black/Oxidizing Electric Arc Furnace (EAF) slag in concrete production. Five recycled and one traditional mixes were produced to identify a convenient substitution ratio for the concrete. Main physical and mechanical properties of concrete containing EAF slag as aggregate according to Fuller's grading curve were experimentally investigated. Chemical and durability tests were performed to study the microstructure and analyse the behaviour of the conglomerate exposed to detrimental agents. Results showed that high substitution ratios of coarse natural aggregates are possible without decreasing mechanical properties of concrete. Conversely, replacement of fine natural aggregates with recycled ones seems feasible at lower substitution ratios only. Presence of calcium and magnesium oxides in the slag does not seem to represent a limit for the durability of concrete, due to their stabilization in crystalline lattice.
Electric arc furnace granulated slag for sustainable concrete
Construction and Building Materials, 2016
This paper deals with the use of industrial by-products from Electric Arc Furnace (EAF) granulated slag for the partial replacement of natural aggregates commonly used to manufacture concrete. Three different gradings of EAF granulated slag were considered. The rheological and mechanical properties of concrete manufactured with a partial replacement of natural aggregates with slag were determined. Dry shrinkage of hardened concrete was evaluated. Results indicated that the maximum percentage of natural aggregate that can be replaced with EAF granulated slag is about 15% in order to limit the superplasticizer dosage required to attain the same workability class of the reference concrete mix at the end of the mixing procedure. The higher the percentage of granulated slag was, the higher the density, the elastic modulus in compression and the compressive strength of the concrete were. Dry shrinkage of the concrete increased by adding a greater amount of EAF granulated slag.
UTILIZATION OF BLAST FURNACE SLAG IN CONCRETE -REVIEW
International Journal of Engineering Technology and Management Sciences, 2024
The impact of silica fume on the strength development rate and durability of binary concretes containing low reactivity slag. Results show that silica fume moderately improves strength gain but significantly enhances durability and water demand. The use of blast furnace slag and fine aggregate in construction materials for cold weather conditions. It found that GBFS aggregate increased compressive strength, frost resistance, and enhanced resistance against sulfuric acid attacks, demonstrating its potential for use in cold weather construction. The durability and strength of coal gangue-based geopolymer concrete, revealing that proper GBFS content and alkali activator modulus can improve freeze-thaw resistance. Alkali activated Self-Compacting Geopolymer Concrete (SCGC) using Ground Granulated Blast Furnace Slag (GGBS) incorporated with 2% nano silica. The mix design with 16M alkaline solution and 500 Kg/m3 binder content exhibited the highest compressive, flexural, and split tensile strength at 90 days. The corrosion performance of recycled aggregate concrete, focusing on water to binder ratios and the impact of 50% ground granulated blast furnace slag. Showed that the addition of ground granulated blast furnace slag increased surface resistivity to 88 kΩcm and decreased carbonation resistance. This increased potential and decreased corrosion rate, indicating that the inclusion of ground granulated blast furnace slag in recycled aggregate concrete mixes enhances corrosion resistance. The impact of waste beverage glass on the performance of ground granulated blast furnace slag concrete mixes. Results show that waste beverage glass reduces workability but improves mechanical properties, while increasing water absorption.
Electric Arc Furnace Slag as Coarse Recycled Aggregate for Concrete Production
Journal of Sustainable Metallurgy, 2015
Electric arc furnace (EAF) slag is a by-product of steel production in electric arc furnaces. Several studies have tried to demonstrate its suitability in civil engineering application, such as in bituminous mixtures and cementbased materials, due to its good physical, chemical and mineralogical properties. Particularly the re-use as coarse aggregate for concrete production has been shown to be a promising valorisation, when physical and chemical stability is guaranteed. Additionally, EAF slag's high mechanical strength makes it suitable for high-performance concrete production. In this work three EAF concretes, with various cement content and also with silica fume addition, were compared with a reference concrete, to identify a convenient mix design to reach a concrete strength class between C50/60 and C60/75. Mechanical strength was evaluated analysing compressive and tensile strength, and elastic modulus. A complementary microstructural analysis was performed after the failure of the specimens, with the aim of analysing the morphology of the interfacial transition zone. Results indicate that the use of EAF slag in concrete allows reaching higher compressive strength than with coarse natural aggregates. EAF slag application in structural concrete promotes also the reduction of cement content in the mix to reach the same strength class. Keywords EAF slag Á Concrete Á Recycled aggregates Á Mechanical properties Á SEM Á ITZ The contributing editor for this article was Yiannis Pontikes.
Sustainability
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 ...