Moisture regime of historical sandstone masonry – a numerical study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21110%2F20%3A00333513" target="_blank" >RIV/68407700:21110/20:00333513 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.1016/j.culher.2019.09.005" target="_blank" >https://doi.org/10.1016/j.culher.2019.09.005</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.culher.2019.09.005" target="_blank" >10.1016/j.culher.2019.09.005</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Moisture regime of historical sandstone masonry – a numerical study

Popis výsledku v původním jazyce

Rising damp causes deterioration of masonry walls in many historical buildings. Although the phenomenon of capillary rise in porous structures is relatively well understood, reliable numerical modeling of the moisture regime, applicable to the assessment of current state as well as to the predictions of changes induced by various corrective moisture-reduction measures, remains a challenge. This paper presents the results of a numerical modeling study dealing with the moisture regime of a masonry wall of the baroque Church of All Saints in Heřmánkovice. The numerical approach used is based on general concepts of mass conservation and Darcian flow of capillary water in porous media. The model was parameterized and validated using experimental data obtained by on-site survey, laboratory analysis and monitoring. The modeling results confirmed our hypothesis that, in a long-term perspective, the second-stage evaporation – controlled by the hydraulic properties of the masonry – prevails over the first-stage evaporation – controlled by the atmospheric conditions – for most simulation scenarios conducted. Of the two corrective moisture-reduction measures considered, i.e. a closed drain versus open drain installation, the latter was found to be significantly more effective, leading to a greater reduction of moisture in the masonry.

Název v anglickém jazyce

Moisture regime of historical sandstone masonry – a numerical study

Popis výsledku anglicky

Rising damp causes deterioration of masonry walls in many historical buildings. Although the phenomenon of capillary rise in porous structures is relatively well understood, reliable numerical modeling of the moisture regime, applicable to the assessment of current state as well as to the predictions of changes induced by various corrective moisture-reduction measures, remains a challenge. This paper presents the results of a numerical modeling study dealing with the moisture regime of a masonry wall of the baroque Church of All Saints in Heřmánkovice. The numerical approach used is based on general concepts of mass conservation and Darcian flow of capillary water in porous media. The model was parameterized and validated using experimental data obtained by on-site survey, laboratory analysis and monitoring. The modeling results confirmed our hypothesis that, in a long-term perspective, the second-stage evaporation – controlled by the hydraulic properties of the masonry – prevails over the first-stage evaporation – controlled by the atmospheric conditions – for most simulation scenarios conducted. Of the two corrective moisture-reduction measures considered, i.e. a closed drain versus open drain installation, the latter was found to be significantly more effective, leading to a greater reduction of moisture in the masonry.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/DG16P02R049" target="_blank" >DG16P02R049: Zhodnocení stabilitního a stavebně technického stavu Broumovské skupiny kostelů a návrh opatření k zachování tohoto jedinečného evropského kulturního dědictví</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2020

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Cultural Heritage

ISSN

1296-2074

e-ISSN

1778-3674

Svazek periodika

42

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

9

Strana od-do

99-107

Kód UT WoS článku

000525864000011

EID výsledku v databázi Scopus

2-s2.0-85073077260