An innovative laboratory procedure for the pre-qualification of repair mortars is described. The tested mortars are suitable for use with new dehumidified plasters applied to historical masonry walls. Long-term plaster detachment frequently occurs because of the mechanical incompatibility of mortar. The procedure consists of the application of static loads to mixed stone block-mortar specimens with particular characteristics, in terms of geometry and adhesion at the interface. A numerical simulation based on the cohesive crack model was used to follow the experimental data, in order to describe the evolutionary phenomenon of detachment as a function of a small number of parameters. The methodology is currently being used at Sacro Monte di Varallo Special Natural Reserve (UNESCO heritage site) in Piedmont (Italy).
Detachment analysis of dehumidified repair mortars applied to historical masonry walls / Bocca, Pietro Giovanni; Valente, Silvio; Grazzini, Alessandro; Alberto, Andrea. - In: INTERNATIONAL JOURNAL OF ARCHITECTURAL HERITAGE. - ISSN 1558-3058. - STAMPA. - 8:3(2014), pp. 336-348. [10.1080/15583058.2013.826304]
Detachment analysis of dehumidified repair mortars applied to historical masonry walls
BOCCA, Pietro Giovanni;VALENTE, Silvio;GRAZZINI, ALESSANDRO;ALBERTO, ANDREA
2014
Abstract
An innovative laboratory procedure for the pre-qualification of repair mortars is described. The tested mortars are suitable for use with new dehumidified plasters applied to historical masonry walls. Long-term plaster detachment frequently occurs because of the mechanical incompatibility of mortar. The procedure consists of the application of static loads to mixed stone block-mortar specimens with particular characteristics, in terms of geometry and adhesion at the interface. A numerical simulation based on the cohesive crack model was used to follow the experimental data, in order to describe the evolutionary phenomenon of detachment as a function of a small number of parameters. The methodology is currently being used at Sacro Monte di Varallo Special Natural Reserve (UNESCO heritage site) in Piedmont (Italy).File | Dimensione | Formato | |
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https://hdl.handle.net/11583/2535088
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