http://www.cnr.it/ontology/cnr/individuo/prodotto/ID202282

Technological behaviour and recycling potential of spent foundry sands in clay bricks (Articolo in rivista)

Type

Label

Technological behaviour and recycling potential of spent foundry sands in clay bricks (Articolo in rivista) (literal)

Anno

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

Alternative label

Dondi, Michele (1); Guarini, Guia (1); Raimondo, Mariarosa (1); Zanelli, Chiara (1); Alonso-Santurde, Rebeca (2); Andrés, Ana (2); Viguri, Juan R. (2) (2011)
Technological behaviour and recycling potential of spent foundry sands in clay bricks
in Journal of environmental management; Academic Press, London (Regno Unito)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

Dondi, Michele (1); Guarini, Guia (1); Raimondo, Mariarosa (1); Zanelli, Chiara (1); Alonso-Santurde, Rebeca (2); Andrés, Ana (2); Viguri, Juan R. (2) (literal)

Pagina inizio

Pagina fine

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

Rivista

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

(1) CNR-ISTEC, Faenza; (2) Department of Chemical Engineering and Inorganic Chemistry, University of Cantabria, Santander, Spain (literal)

Titolo

Technological behaviour and recycling potential of spent foundry sands in clay bricks (literal)

Abstract

The feasibility of recycling spent foundry sand in clay bricks was assessed in laboratory, pilot line and industrial trials, using naturally occurring sand as a reference. Raw materials were analyzed by X-ray fluorescence, X-ray diffraction, particle size distribution, and leaching and combined to produce bodies containing up to 35% wt. sand. The extrusion, drying and firing behaviour (plasticity, drying sensitivity, mechanical strength, bulk density, water absorption, and shrinkage) were determined. The microstructure, phase composition, durability and leaching (EN 12457, granular materials, end-life step, European Waste Landfill Directive; NEN 7345, monolithic materials, use-life step, Dutch Building Material Decree) were evaluated for bricks manufactured at optimal firing temperature. These results demonstrate that spent foundry sand can be recycled in clay bricks. There are no relevant technological drawbacks, but the feasibility strongly depends on the properties of the raw materials. Spent foundry sand may be introduced into bricks up to 30% wt. Most of the hazardous elements from the spent foundry sand are inertized during firing and the concentrations of hazardous components in the leachates are below the standard threshold for inert waste category landfill excepting for chromium and lead; however, their environmental risk during their use-life step can be considered negligible (literal)

Editore