Lightweight Concretes with Improved Water and Water Vapor Transport for Remediation of Damp Induced Buildings

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 imp...

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Bibliographic Details
Published in:Materials 2021-10, Vol.14 (19), p.5902
Main Authors: Pokorný, Jaroslav, Ševčík, Radek, Šál, Jiří, Zárybnická, Lucie, Žák, Jaroslav
Format: Article
Language:English
Subjects:
Aggregates
Cement
Humidity
Laboratories
Lightweight concretes
Masonry
Masonry construction
Masonry materials
Mortars (material)
Porosity
Porous materials
Remediation
Rising damp
Silicon dioxide
Transport properties
Vapor resistance
Water vapor
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Summary: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.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma14195902