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Lightweight concretes with improved water and water vapor transport for remediation of damp induced buildings

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    0546408 - ÚTAM 2022 RIV CH eng J - Journal Article
    Pokorný, J. - Ševčík, Radek - Šál, J. - Zárybnická, Lucie - Žák, J.
    Lightweight concretes with improved water and water vapor transport for remediation of damp induced buildings.
    Materials. Roč. 14, č. 19 (2021), č. článku 5902. E-ISSN 1996-1944
    Institutional support: RVO:68378297
    Keywords : lightweight concrete * alternative aggregate * compressive strength * remediation intervention
    OECD category: Materials engineering
    Impact factor: 3.748, year: 2021
    Method of publishing: Open access
    https://doi.org/10.3390/ma14195902

    Most of the historical and old building stock in Europe are constructed from masonry, when brick, stones, or their combination are bound with traditional mortars. Rising damp, due to accompanying effects, is the main factor influencing the quality of indoor climate as well as having an important impact on the durability of masonry structures. In this study, new types of lightweight concrete with waste aggregate content as a suitable material for remediation of damp damaged masonries were designed and tested. Alternative aggregate served as silica sand substitution in the range of 0–100 vol.%. Basic structural properties, mechanical resistance, water, and water vapor transport properties were measured after 28 days of water curing and were compared with dense reference concrete and with traditional masonry materials as well. Moreover, the porous structure of produced concretes and changes caused by usage of alternative aggregate usage were evaluated
    with the mercury intrusion porosimetry (MIP) technique. Obtained experimental data showed the suitability of modified concretes with 25–50 vol.% of waste aggregate content to ensure acceptable strength and hydric properties, and these properties were found to be comparable with masonry structures and materials used in the past.
    Permanent Link: http://hdl.handle.net/11104/0322928

     
     
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