Copper Slag of Pyroxene Composition as a Partial Replacement of Natural Aggregate for Concrete Production

Copper slag, a by-product of the pyrometallurgical process used for obtaining copper from copper ore in Bor, Serbia, contains mainly silicon, iron, calcium, and aluminium oxides. Due to such properties, it is disposed of in landfills. Despite the favourable technical properties copper slag aggregate...

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Bibliographic Details
Published in:Minerals (Basel) 2021-05, Vol.11 (5), p.439
Main Authors: Filipović, Sandra, Đokić, Olivera, Radević, Aleksandar, Zakić, Dimitrije
Format: Article
Language:English
Subjects:
Aggregates
Aluminium
Aluminum
Aluminum oxide
By products
Calcium
Cement
Chemical elements
Chloride ions
Chloride resistance
Cold tolerance
Compressive strength
Concrete
Concrete mixes
Construction industry
Cooling
Copper
Copper ores
copper slag
Energy consumption
Environmental impact
Frost resistance
Highway construction
Landfill
Landfills
Lime
Low resistance
Metallurgy
natural aggregate
Oxides
Penetration
Penetration resistance
Properties
Raw materials
recycled aggregate
Slag
Waste disposal sites
Water absorption
water permeability
Wear resistance
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Summary:Copper slag, a by-product of the pyrometallurgical process used for obtaining copper from copper ore in Bor, Serbia, contains mainly silicon, iron, calcium, and aluminium oxides. Due to such properties, it is disposed of in landfills. Despite the favourable technical properties copper slag aggregates possess, such as low-water absorption (WA24 0.6%), low resistance to fragmentation (LA 10%), and low resistance to wear (MDE 4%), its use in the construction industry is still limited. The results of testing the technical properties of copper slag aggregates (CSAs) as a potential replacement for natural river aggregate (RA) are presented in this paper. The experiments included tests on three concrete mixtures with partial replacement of coarse natural aggregate with copper slag. The replacement of RA particle sizes of 8/16 mm and 16/31.5 mm with CSA in the amount of 20% + 50% and 50% + 50% resulted in an increase in the compressive strength of 12.4% and 10.5%, respectively. The increase of CSA content led to a decrease in water penetration resistance and salt-frost resistance of concrete, whereas the resistance to chloride ion penetration did not change significantly.
ISSN:2075-163X
2075-163X
DOI:10.3390/min11050439