Damage risk assessment of building materials with moisture hysteresis

Michele Libralato*, Alessandra De Angelis, Paola D’Agaro, Giovanni Cortella, Menghao Qin, Carsten Rode

*Corresponding author for this work

    Research output: Contribution to journalJournal articleResearchpeer-review

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    Abstract

    Heat and Moisture Transfer (HMT) simulations are used to evaluate moisture related damage risks in building envelopes. HMT simulations are commonly performed accepting the hypothesis of not considering the moisture hysteresis of materials. The results of HMT simulation of a timber wall with hysteresis are presented, and compared to the results of three simplified models, showing the effects of hysteresis on the simulation results and on the assessment of the risk of decay. Moisture content is the most influenced variable, while temperature and relative humidity are slightly affected. The wood decay risk analysis is performed using the simplified 20% moisture content rule. Similar temperature values and relative humidity values are calculated as simplified models, while the moisture content annual average values have differences up to 2.3%. The wood decay risk obtained with the simplified models could be overestimated if the simulation is performed using the desorption curve, while it could be underestimated with the adsorption curve. The best approximation is obtained with the mean sorption curve, while the desorption curve and the adsorption curve could be used to calculate the upper and lower boundary of the moisture contents respectively.
    Original languageEnglish
    Article number012043
    Book seriesJournal of Physics: Conference Series
    Volume2069
    Issue number1
    Number of pages8
    ISSN1742-6596
    DOIs
    Publication statusPublished - 2021
    Event8th International Buildings Physics Conference 2021 - Online event, Copenhagen, Denmark
    Duration: 25 Aug 202127 Aug 2021
    Conference number: 8
    https://www.ibpc2021.org/

    Conference

    Conference8th International Buildings Physics Conference 2021
    Number8
    LocationOnline event
    Country/TerritoryDenmark
    CityCopenhagen
    Period25/08/202127/08/2021
    Internet address

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