Dilation behaviour of lime mortars for restoration work / Jean-Didier Mertz in European journal of environmental and civil engineering, Vol. 16 N° 5 (Mai 2012)  

Public ISBD [article]  inEuropean journal of environmental and civil engineering > Vol. 16 N° 5 (Mai 2012) . - pp. 527-542 Titre : Dilation behaviour of lime mortars for restoration work : Application to the compatibility of cracked stone reassembling Type de document : texte imprimé Auteurs : Jean-Didier Mertz, Auteur ; Mikaël Guiavarc’h, Auteur ; Paolo Pagnin, Auteur Année de publication : 2012 Article en page(s) : pp. 527-542 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Hygric dilation Thermal Cracks Specific surface area Swelling clay Compatibility Lime mortar Injection grout Limestones Archaeological sites Résumé : A major problem in stone restoration is the reassembling of cracked stones using mortar and grout. The usual criteria for selection of products are related to chemical (free soluble salts), petrophysical and mechanical properties (absorption of water, porosity, elasticity modulus, compressive and traction strength resistance, adherence and hardness). Because in semi-arid environments stones are subjected to high hygric and thermal gradients, current validated solutions could be less durable or unsuitable. Several investigations underline the importance of dilation as a mechanism of damage and stone decay. The set up of a method related to thermal and hygric dilation measurements is presented. Dilation is linked to structural parameters of the materials and represents a significant physical property to assess stone–mortar compatibility. The study has been undertaken for the treatment of cracked limestones from the archaeological sites of Djemila (Algeria) and Volubilis (Morocco). DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.668018 [article] Dilation behaviour of lime mortars for restoration work : Application to the compatibility of cracked stone reassembling [texte imprimé] / Jean-Didier Mertz, Auteur ; Mikaël Guiavarc’h, Auteur ; Paolo Pagnin, Auteur . - 2012 . - pp. 527-542. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 16 N° 5 (Mai 2012) . - pp. 527-542 Mots-clés : Hygric dilation Thermal Cracks Specific surface area Swelling clay Compatibility Lime mortar Injection grout Limestones Archaeological sites Résumé : A major problem in stone restoration is the reassembling of cracked stones using mortar and grout. The usual criteria for selection of products are related to chemical (free soluble salts), petrophysical and mechanical properties (absorption of water, porosity, elasticity modulus, compressive and traction strength resistance, adherence and hardness). Because in semi-arid environments stones are subjected to high hygric and thermal gradients, current validated solutions could be less durable or unsuitable. Several investigations underline the importance of dilation as a mechanism of damage and stone decay. The set up of a method related to thermal and hygric dilation measurements is presented. Dilation is linked to structural parameters of the materials and represents a significant physical property to assess stone–mortar compatibility. The study has been undertaken for the treatment of cracked limestones from the archaeological sites of Djemila (Algeria) and Volubilis (Morocco). DEWEY : 624 ISSN : 1964-8189 En ligne : http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.668018

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