Risk Assesment of Water Vapor Condensation In Wall Made of Hemp-Lime Composite

Brzyski, Przemysław

doi:10.21307/acee-2016-021

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…Coefficients of water vapor permeability (δ) of the considered composites were also determined experimentally, whereas the coefficients of water vapor permeability of plaster materials were assumed according to EN-ISO 10456:2003 standard and [ 40 ]. A similar analysis concerning water vapor transport in wall construction based on other composite recipe was presented in article [ 41 ]. For the calculations, wall section was divided into 18 layers with constant thermal resistance factor R = 0.2 (m 2 ·K)/W.…”

Section: Methodsmentioning

confidence: 93%

Composite Materials Based on Hemp and Flax for Low-Energy Buildings

et al. 2017

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The article presents the results obtained in the course of a study on prospective application of flax/hemp wastes as a filling material of lime-based composites in the construction of low-energy buildings. The utilized filler comprised the hydrated lime with clay and Portland cement used as additives. The analysis involved evaluation of such properties as porosity, density, thermal conductivity, absorptivity, permeability, as well as compressive and flexural strength. Depending on the quantity of the filler, the properties of the composite changed. This, in turn, enabled to evaluate whether the utilized composite met the thermal requirements established for low-energy buildings. Afterwards, the obtained data were cross-referenced with the results gathered in the case of a room built of autoclaved aerated concrete. In order to prevent reaching the critical surface humidity, the internal surface temperature had to be calculated. Moreover, the chances of interstitial condensation occurring in the wall made of the analyzed lime–flax–hemp composite were determined as well. The study showed that the composite exhibits low strength, low density, low thermal conductivity, and high absorptivity. The external walls made of the lime–flax–hemp composite receive a limited exposure to condensation, but not significant enough to constitute any threat. The requirements established for low-energy buildings can be met by using the analyzed composite.

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Section: Methodsmentioning

confidence: 93%

Composite Materials Based on Hemp and Flax for Low-Energy Buildings

et al. 2017

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“…(M. Li, et al, 2019). Thermal properties are influenced by variation of material density and relative humidity of the environment condition (Brzyski, 2016).…”

Section: Introductionmentioning

confidence: 99%

Study of Condensation Risk in Ecological Blocks with Recycled Wood Aggregate

Pruteanu

Enţuc

Isopescu

et al. 2021

Bulletin of the Polytechnic Institute of Iași. Construction. Architecture Section

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Concrete is a building material with a continuous demand in the construction industry due to the convenient price-performance ratio. On the other hand, concrete is not an environmentally friendly material. Thus, in order to obtain a sustainable material, wood waste can be recycled and used as light aggregates in the manufacture of precast ecological building blocks. Block walls must satisfy not only structural criteria but also functional requirements. In addition, thermal contribution is important in reducing energy consumption over the life of the building. The presence of moisture on the exterior walls due to the appearance of condensation will decrease the thermal performance of building materials. This paper analyses the occurring of condensation risk and its location in the outer wall made of wood-concrete blocks by the Glaser method, for different situations of arrangement and composition of the layers.

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