Characterization of Portuguese Historical Gypsum Mortars: A Comparison between Two Case Studies

Abstract:

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The use of gypsum plaster for interior covering of walls and ceilings in the Portuguese architecture was particularly expressive in the period between the XVIII and the XX century. However, information about this important heritage is almost inexistent, which is leading to a fast loss of important patrimony. In this paper, the results of the characterization of gypsum plaster samples belonging to two buildings from the same historical period (end of the XIX century and beginning of the XX), situated in distant geographical regions of Portugal are presented and discussed. XRD, TGA-DTA, optical microscopy and SEM-EDS observations were used for the chemical and microstructural characterization. Some physical and mechanical properties, such as capillary absorption, dynamic elasticity modulus and compressive strength were also determined and a relationship between the characteristics observed in the samples and the technology associated to their use and application on site, as well as the possible existence of regional influences on all these aspects, are discussed.

Info:

Periodical:

Materials Science Forum (Volumes 636-637)

Edited by:

Luís Guerra ROSA and Fernanda MARGARIDO

Pages:

1258-1265

DOI:

10.4028/www.scientific.net/MSF.636-637.1258

Citation:

T. Freire et al., "Characterization of Portuguese Historical Gypsum Mortars: A Comparison between Two Case Studies", Materials Science Forum, Vols. 636-637, pp. 1258-1265, 2010

Online since:

January 2010

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Price:

$35.00

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