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Title

Accelerated weathering tests of carbonate building stones in 4 old historic monuments, Morocco: simulations and preliminary laboratory assessments of salt efflorescence

Other TitlesEssais de vieillissement acceleres de pierres de construction en carbonate dans 4 anciens monuments historiques, Maroc: simulations et évaluations préliminaires des efflorescences salines au laboratorie
AuthorsDalimi, M.; Zakarya, D.; Baghdad, B.; Bounakhla, M.; Iñigo, Adolfo C.
KeywordsWeathering simulation
Salt crystallization tests
Calcium carbonate stone
Historical monuments
Morocco
Issue Date2013
PublisherEditions Mersenne
CitationSciencelib 5: 130310 (2013)
AbstractOur ancient buildings are subject to a range of decay processes which endanger the future of architectural heritage in many historic cities all over the world, the ageing process is accelerating nowadays. Most monuments and buildings in Morocco are constructed of the local calcareous stones. Today, these stones show considerable damage in many monuments, particularly through alveolar weathering, which is frequently very intense. Owing to the marine and urban environment, salt crystallization in the stone’s pore spaces has been recognized as the main weathering process responsible for the deterioration of the country’s monuments. Salts crystallization causes major physical damage to natural building stones. The damaging effect of these processes can be traced back to physically induced stress inside of the stone while crystallizing. The increasing scientific research done during the past century has shown that there are numerous parameters that have an influence on the weathering resulting from these processes. However, the working mechanisms of the stress development within the stone and its material dependency are still subject to discussion. A method largely used for understanding the mechanics of natural deterioration is to observe stone behaviour in the laboratory by subjecting them to various imbibition- drying cycles (Benavente et al. 2001; Nicholson 2001; Thua Tri et al. 2006; Ruiz-Agudo et al. 2007). This paper gives an overview of stones salt weathering in four Moroccan historical monuments. Despite the relatively small number of cycles, our results show that there are aggressive forms of salt crystallization which affected the weathered samples.
Description20 páginas, 8 tablas y 8 figuras
URIhttp://hdl.handle.net/10261/180916
ISSN2111-4706
Appears in Collections:(IRNASA) Artículos
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