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Waste Management & Research, Vol. 19, No. 6, 539-544 (2001)

Optimisation of industrial wastes reuse as construction materials

Carlo Collivignarelli

Department of Civil Engineering, University of Bresciavia Branze 38, I 25123 Brescia, Italy

Sabrina Sorlini

Department of Civil Engineering, University of Bresciavia Branze 38, I 25123 Brescia, Italy

This study concerns the reuse of two inorganic wastes, foundry residues and fly ashes from municipal solid waste incineration, as "recycled aggregate" in concrete production. This kind of reuse was optimised by waste treatment with the following steps: waste washing with water; waste stabilisation-solidification treatment with inorganic reagents; final grinding of the stabilised waste after curing for about 10-20 days. Both the treated wastes were reused in concrete production with different mix-designs. Concrete specimens were characterised by means of conventional physical-mechanical tests (compression, elasticity modulus, shrinkage) and different leaching tests. Experimental results showed that a good structural and environmental quality of "recycled concrete" is due both to a correct waste treatment and to a correct mix-design for concrete mixture.

Key Words: Foundry residues • fly ash • waste reuse • construction material • recycled aggregate • waste stabilisation solidification • concrete


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