Rising damp: Optimization of the wall base ventilation system

• Type: Article in International Conference Proceedings Book
• Date: 2014

Authors

Ana Sofia Guimarães (Author) FEUP; João Delgado (Author) FEUP; Vasco Freitas (Author) FEUP

Conference proceedings International

Title: Defect and Diffusion Forum

Pages: 311-316

9th International Conference on Diffusion in Solids and Liquids Mass Transfer - Heat Transfer - Microstructure and Properties - Nanodiffusion and Nanostructured Materials, DSL 2013

Madrid, 24 June 2013 through 28 June 2013

Indexing

Scopus - 3 Citations

Scientific classification

CORDIS: Technological sciences > Engineering > Civil engineering

FOS: Engineering and technology > Civil engineering

Other information

Authenticus ID: P-009-M9H

DOI: 10.4028/www.scientific.net/ddf.353.311

Abstract (EN): Rising damp constitutes one of the main causes of monumental heritage and old buildings degradation, especially, its thick walls with heterogeneous composition. The LFC-FEUP has been developed important research in rising damp domain. In recent years, was validated and experimentally characterized the operation principle of a technique called "wall base ventilation system" for the treatment of rising damp in monumental heritage and ancient buildings consisting of circulating air at the base of the buildings walls with high thickness and heterogeneity in its constitution, with a saturation distant relative humidity. The studies previously developed allowed the interest and viability of the proposed system, taking time to develop a methodology for optimizes it. In this paper it is presented the optimization of the wall base ventilation system based on some important physical parameters. To optimize the system, it was developed a 2D evaporation model that describes the moisture transfer between the system and the wall as well as the water vapour transport throughout the system (Evaporation and Transport Model - ETM). It was also used and adapted another 2D model, to describe the rising damp phenomenon in buildings walls, considering the wall base ventilation system (Rising Damp and Evaporation Model - RDEM). Finally, the design model was developed, using both models (ETM and RDEM) and some experimental validation was done, which allowed the comparison between the levels archived by the wet front analytically and experimentally. © (2014) Trans Tech Publications.

Language: English

Type (Professor's evaluation): Scientific