MATEC Web Conf.
Volume 282, 20194th Central European Symposium on Building Physics (CESBP 2019)
|Number of page(s)||6|
|Published online||06 September 2019|
The urban heat island effect on frost damage of natural building stones.
1 PProGRess, Department of Geology, Ghent University, Krijgslaan 281 S8, 9000 Ghent, Belgium
2 Atmospheric Physics, Department of Physics and Astronomy, Ghent University, Krijgslaan 281 S9 ; 9000 Ghent, Belgium
3 Building Physics Group, Department of Engineering and Architecture, Sint-Pietersnieuwstraat 41 B4, 9000 Ghent, Belgium
Climate plays a major role in the weathering of building stones. This study specifically investigates the influence of the urban heat island (UHI) in Ghent, Belgium, on freeze-thaw (F-T) weathering of natural building stones and their hydrophobic equivalent. Climatic analysis of data of two places in and around Ghent indicates higher temperatures and lower wind speeds in the city center. This leads to a reduced number of F-T cycles and a lower wind-driven load. Hygrothermal modelling of a natural building stone, Savonnières limestone, is performed for the urban and rural climate of Ghent on the untreated limestone and on the treated limestone to assess the freeze-thaw risk inside these materials. Urban climate has a mitigating effect on the potential frost risk in natural building stones as a result of the urban heat island. Additionally, the application of a water repellent product reduces the potential frost risk even more, since the water density in the stone is reduced.
© The Authors, published by EDP Sciences, 2019
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