Moisture transport properties of brick – comparison of exposed, impregnated and rendered brick

Tessa Kvist Hansen, Søren Peter Bjarløv, Ruut Peuhkuri

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    Abstract

    In regards to internal insulation of preservation worthy brick façades, external moisture sources, such as wind-driven rain exposure, inevitably has an impact on moisture conditions within the masonry construction. Surface treatments, such as hydrophobation or render, may remedy the impacts of external moisture. In the present paper the surface absorption of liquid water on masonry façades of untreated, hydrophobated and rendered brick, are determined experimentally and compared. The experimental work focuses on methods that can be applied on-site, Karsten tube measurements. These measurements are supplemented with results from laboratory measurements of water absorption coefficient by partial immersion. Based on obtained measurement results, simulations are made with external liquid water loads for determination of moisture conditions within the masonry of different surface treatments. Experimental results showed a very clear reduction of the liquid water uptake for hydrophobated cases. However, hygrothermal simulations demonstrated clear differences in the effect of the surface treatments on the moisture content of brick depending on the brick type.
    Original languageEnglish
    Title of host publicationInternational RILEM Conference on Materials, Systems and Structures in Civil Engineering 2016 : segment on Moisture in Materials and Structures
    PublisherRilem publications
    Publication date2016
    Pages351-360
    ISBN (Print)978-2-35158-178-0
    ISBN (Electronic)978-2-35158-179-7
    Publication statusPublished - 2016
    EventInternational RILEM Conference on Materials, Systems and Structures in Civil Engineering - Technical University of Denmark, Kgs. Lyngby, Denmark
    Duration: 15 Aug 201629 Aug 2016

    Conference

    ConferenceInternational RILEM Conference on Materials, Systems and Structures in Civil Engineering
    LocationTechnical University of Denmark
    Country/TerritoryDenmark
    CityKgs. Lyngby
    Period15/08/201629/08/2016

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