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 ore in Bor, Serbia, contains mainly silicon, iron, calcium, and aluminium oxides. Due to such properties, it is disposed landfills. Despite favourable technical properties slag aggregates possess, as low-water absorption (WA24 0.6%), low resistance fragmentation (LA 10%), wear (MDE 4%), its use construction industry still limited. The results testing (CSAs) potential replacement natural river aggregate (RA) are presented this paper. experiments included tests on three concrete mixtures with partial coarse slag. RA particle sizes 8/16 mm 16/31.5 CSA amount 20% + 50% resulted an increase compressive strength 12.4% 10.5%, respectively. content led decrease water penetration salt-frost concrete, whereas chloride ion did not change significantly.