In this work, the high-temperature inertization product of a representative batch of samples of cement-asbestos (CA) from different localities in Italy have been characterized with a multidisciplinary approach. All the raw CA samples were heated at 1200°C for 15 min. After firing, they underwent a series of solid state reactions leading to global structural changes of the matrix. Effects of annealing time and temperature on the crystallization kinetics were thoroughly investigated. Both factors acted in favour of equilibrium. Three classes of CA were identified with the aid of phase diagrams and of specific plots relating chemical and mineralogical parameters. This result was considered of importance in view of the potential use of transformed cement-asbestos as a secondary raw material. In principle, the content of CA packages removed from the environment and their corresponding heat-treated products can be classified simply using XRF. This method allows for the selection of appropriate fractions in function of the most suitable recycling solution adopted. Samples belonging to the class called larnite-rich, turned out to be of great interest as possible candidate for substituting a fraction of cement in many building materials and innovative green cement productions.

Crystal chemistry of the high temperature product of transformation of cement-asbestos / Viani, Alberto; Gualtieri, Alessandro; Pollastri, Simone; Rinaudo, Caterina; Croce, Alessandro; Urso, Giancarlo. - In: JOURNAL OF HAZARDOUS MATERIALS. - ISSN 0304-3894. - STAMPA. - 248-249:1(2013), pp. 69-80. [10.1016/j.jhazmat.2012.12.030]

Crystal chemistry of the high temperature product of transformation of cement-asbestos

Viani, Alberto;GUALTIERI, Alessandro;POLLASTRI, SIMONE;URSO, Giancarlo
2013

Abstract

In this work, the high-temperature inertization product of a representative batch of samples of cement-asbestos (CA) from different localities in Italy have been characterized with a multidisciplinary approach. All the raw CA samples were heated at 1200°C for 15 min. After firing, they underwent a series of solid state reactions leading to global structural changes of the matrix. Effects of annealing time and temperature on the crystallization kinetics were thoroughly investigated. Both factors acted in favour of equilibrium. Three classes of CA were identified with the aid of phase diagrams and of specific plots relating chemical and mineralogical parameters. This result was considered of importance in view of the potential use of transformed cement-asbestos as a secondary raw material. In principle, the content of CA packages removed from the environment and their corresponding heat-treated products can be classified simply using XRF. This method allows for the selection of appropriate fractions in function of the most suitable recycling solution adopted. Samples belonging to the class called larnite-rich, turned out to be of great interest as possible candidate for substituting a fraction of cement in many building materials and innovative green cement productions.
2013
248-249
1
69
80
Crystal chemistry of the high temperature product of transformation of cement-asbestos / Viani, Alberto; Gualtieri, Alessandro; Pollastri, Simone; Rinaudo, Caterina; Croce, Alessandro; Urso, Giancarlo. - In: JOURNAL OF HAZARDOUS MATERIALS. - ISSN 0304-3894. - STAMPA. - 248-249:1(2013), pp. 69-80. [10.1016/j.jhazmat.2012.12.030]
Viani, Alberto; Gualtieri, Alessandro; Pollastri, Simone; Rinaudo, Caterina; Croce, Alessandro; Urso, Giancarlo
File in questo prodotto:
Non ci sono file associati a questo prodotto.
Pubblicazioni consigliate

Licenza Creative Commons
I metadati presenti in IRIS UNIMORE sono rilasciati con licenza Creative Commons CC0 1.0 Universal, mentre i file delle pubblicazioni sono rilasciati con licenza Attribuzione 4.0 Internazionale (CC BY 4.0), salvo diversa indicazione.
In caso di violazione di copyright, contattare Supporto Iris

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11380/1060409
Citazioni
  • ???jsp.display-item.citation.pmc??? 2
  • Scopus 35
  • ???jsp.display-item.citation.isi??? 34
social impact