Durability of concrete made with EAF slag as aggregate |
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| Affiliation: | 1. Civil Engineering Department, Escuela Politécnica Superior, University of Burgos, Calle Villadiego s/n, 09001 Burgos, Spain;2. Materials Science and Engineering Department, ETSICCP, University of Cantabria, Avda. de los Castros s/n, 39005 Santander, Spain;3. Fundación Eraiker, Casa Nao No 3. Barrio Alza. Apartado (Postal Box) 4022, 20080 San Sebastián, Spain;4. Mining and Metallurgical Engineering Department, ETSIB, University of Basque Country, Alameda de Urquijo s/n, 48013 Bilbao, Spain;1. UPV/EHU, Dept. of Engineering of Materials, c/ Alameda Urquijo s/n, 48013 Bilbao, Spain;2. UPV/EHU, Dept. of Mechanical Engineer, Paseo Rafael Moreno “Pitxitxi”, 2, 48013 Bilbao, Spain;3. UPV/EHU, Dept. of Mechanical Engineer, c/ Alameda Urquijo s/n, 48013 Bilbao, Spain;4. Construction Department, EPS University of Burgos, Calle Villadiego s/n, 09001 Burgos, Spain;1. Faculty of Civil Engineering, Ho Chi Minh City Open University, 97 Vo Van Tan, District 3, Ho Chi Minh City, Vietnam;2. Sustainable Developments in Civil Engineering Research Group, Faculty of Civil Engineering, Ton Duc Thang University, Ho Chi Minh City, Vietnam;3. Department of Civil Engineering, Faculty of Engineering, Prince of Songkla University, Hat Yai, Songkhla, Thailand;1. University of the Basque Country (UPV/EHU), Department of Mining, Metallurgical and Materials Science (UPV/EHU), Alameda Urquijo, s/n. 48013 Bilbao, Bizkaia, Spain;2. TECNALIA Research & Innovation, Unit of Sustainable Construction, c/Geldo, Edificio 700 – Parque Tecnológico de Bizkaia, 48160 Derio, Bizkaia, Spain;3. University of the Basque Country (UPV/EHU), Department of Mechanical Engineering (UPV/EHU), Paseo Rafael Moreno Pitxitxi, 3, 48013 Bilbao, Bizkaia, Spain;1. Department of Civil Engineering, University of Burgos, EPS, Calle Villadiego s/n, 09001 Burgos, Spain;2. Department of Construction, University of Burgos, EPS, Calle Villadiego s/n, 09001 Burgos, Spain;3. Department of Metallurgical Engineering and Materials Science, University of the Basque Country, ETSIB, Alameda Urquijo s/n, 48013 Bilbao, Spain;1. TECNALIA. C/Geldo, Parque Tecnológico de Bizkaia, Edificio 700, 48160 Derio, Spain;2. UPV/EHU, Dep. Mining, Metallurgical and Mat. Science, Alameda Urquijo s/n, 48013 Bilbao, Spain;3. Dept. of Civil Engineering, EPS Univ. of Burgos, C/Villadiego s/n, 09001 Burgos, Spain |
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| Abstract: | Electric arc furnace (EAF) slag, a by-product of steelmaking recovered after the oxidizing process, is useful when employed as aggregate in hydraulic concrete and bituminous mixtures. Concrete made with EAF oxidizing slag as an aggregate shows good physical and mechanical properties and further study of its durability will ensure greater reliability in its usage. This paper details a systematic study of slag concrete behaviour under severe test conditions. The tests were designed to evaluate the internal expansivity of the slag, its chemical reactivity with some components of the cement and its resistance to environmental agents, ice and moisture. The results indicate that the durability of slag concrete is acceptable, though slightly lower than that of conventional concrete. When the mix proportions are adequate, both the mechanical strength and the durability of slag concrete are satisfactory, although in less care mixes durability is likely to be impaired.Finally, leaching tests were performed to determine the environmental impact of the concrete, which, in comparison to results obtained directly from the slag, confirmed an important cloistering effect of the cementitious matrix on contaminant elements. |
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