Magnesium-hemp concrete is less vapor-permeable than lime-hemp concrete while the cup method is still problematic
Artykuł w czasopiśmie
MNiSW
200
Lista 2024
| Status: | |
| Autorzy: | Pietrak Karol, Krakowiak Mateusz, Cieślikiewicz Łukasz, Brzyski Przemysław, Łapka Piotr |
| Dyscypliny: | |
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| Rok wydania: | 2025 |
| Wersja dokumentu: | Drukowana | Elektroniczna |
| Język: | angielski |
| Wolumen/Tom: | 280 |
| Numer artykułu: | 113112 |
| Strony: | 1 - 8 |
| Impact Factor: | 7,6 |
| Web of Science® Times Cited: | 3 |
| Scopus® Cytowania: | 2 |
| Bazy: | Web of Science | Scopus |
| Efekt badań statutowych | NIE |
| Finansowanie: | This work was supported by the National Centre for Research and Development (Poland) under M-ERA.NET 2 grant no. M-ERA.NET2/2019/4/2020 "Manufacturing technology of building products made of ecological high performance fibre composites with encapsulated PCM for the NZEB application, HEMP4NZEB" and by the National Science Centre (Poland) under MINIATURA 3 grant no. 2019/03/X/ST8/01950. The authors would like to thank Fabian Deitrich and Mateusz Wendołowicz from the Institute of Heat Engineering in Warsaw for help with the laboratory equipment |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Magnesium oxychloride cement (MOC) is an alternative, less commonly used binder for hemp bio-composites that offers improved mechanical strength compared to the conventional lime binder. However, the hygric properties of hemp composites containing MOC have been sparsely studied. This paper presents an experimental study comparing the water vapor permeability of hemp concretes with magnesium and lime binders, providing valuable insights into the hygric characteristics of these materials and the measurement method applied. These materials are particularly interesting due to their enhanced sustainability and reduced environmental impact compared to traditional concretes, bricks, and mortars. The results demonstrate that the vapor permeability of magnesium-bonded hempcrete is similar to that of gypsum plasterboard, whereas lime-bonded hempcrete shows twice the permeability. The vapor transmission measurements also offered an opportunity to critically examine the well-established cup (dish) method. The study revealed that, for the materials tested, the conditions outlined in ISO standard 12572:2016 were not entirely met. Specifically, in dry cups, where desiccants are expected to create near-zero relative humidity (RH), measured values ranged from 10 to 30 %. In particular, calcium chloride desiccant provided better drying (10–20 % RH) than silica gel (15–30 % RH). |
