Ancient Wall Tiles – The Importance of the Glaze/Ceramic Interface in Glaze Detachment

Authors

  • Marisa COSTA University of Aveiro
  • Paulo CACHIM University of Aveiro
  • João COROADO Institute Polytecnic of Tomar
  • Fernando ROCHA University of Aveiro
  • Ana VELOSA University of Aveiro

DOI:

https://doi.org/10.5755/j01.ms.20.1.3815

Keywords:

ancient wall tiles, glaze/ceramic body interface, salt crystallization, glaze detachment

Abstract

One of the most severe pathologies suffered by early industrially produced tiles in Portugal in late nineteenth century is glaze detachment in wall tiles placed in the lower part of the façade. It is known that salts crystallize provoking the glaze detachment, destroying the waterproofing and the beauty of the wall tile and this is one of the crucial factors towards this occurrence. The present work questions the importance of the thickness of glaze/ceramic body interface, in what concerns glaze detachment provoked by salt crystallization. SEM-EDS was used to perform all the observations that lead to the conclusion that the exuberance of the interface between glaze and ceramic body has no influence in the resistance of the glaze to salt crystallization though time, being the porous network more determinant.

DOI: http://dx.doi.org/10.5755/j01.ms.20.1.3815

Author Biographies

  • Marisa COSTA, University of Aveiro

    Department of Civil Engineering

    PhD student

  • Paulo CACHIM, University of Aveiro

    Department of Civil Engineering

    professor

  • João COROADO, Institute Polytecnic of Tomar

    Restauration

    professor

  • Fernando ROCHA, University of Aveiro
    Department of Geociences
  • Ana VELOSA, University of Aveiro
    Department of Civil Engineering

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Published

2014-03-23

Issue

Vol. 20 No. 1 (2014)

Section

CONSTRUCTION MATERIALS

License

 

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