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Author(s): Ana S. Guimarães
João M. P. Q. Delgado
Vasco P. de Freitas
Title: Treatment of rising damp in historic buildings: Experimental campaign of wall base ventilation and interface effect analysis
Issue Date: 2016-07-01
Abstract: The treatment of rising damp in historical building walls is a very complex procedure. In this work it ispresented an extension of the continuous "in situ" results of the rising damp treatment conducted in aPortuguese historical church, using the wall base ventilation technology. The results, registered over fouryears, clearly reveal the best ventilations periods and indicate that the best solutions must correspondto admit outside air during summer periods and inside air during winter periods. Furthermore, anotherimportant aspect was to better understand the difference in absorption behaviour between walls withand without joints when the rising damp treatment is conducted. It also presented an experimentalcampaign and a critical analysis of water absorption in samples of clay brick with and without joints andjoints with different contact configurations (perfect contact, hydraulic continuity and air space betweenlayers). The results showed that when the moisture reaches the interface,the wetting process gets slowerdue to the interfaces hygric resistance. This resistance was more pronounced for joints with air spacebetween layers and less for joints with hydraulic continuity.
Document Type: Artigo em Revista Científica Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Revista Científica Internacional

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