Water vapour permeability of innovative building materials from different waste

•Innovative thermal insulation panels based on waste materials were developed.•Dry cup method was validated with known permeability values.•Hygrothermal performance of panels made of waste materials was evaluated.•Water vapour resistance factor was experimentally measured. The hygrothermal performan...

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Bibliographic Details
Published in:Materials letters 2020-04, Vol.265, p.127459, Article 127459
Main Authors: Buratti, C., Belloni, E., Merli, F.
Format: Article
Language:English
Subjects:
Acoustic noise
Building insulation
Building materials
Coffee
Construction materials
Cork
Gypsum
Gypsum plaster
Heat loss
Insulation
Leather
Materials science
Mineral fibers
Panels
Perlite
Permeability
Permeability performance
Polystyrene resins
Recycled materials
Recycled waste materials
Resistance factors
Vapor resistance
Vermiculite
Water vapor
Water vapour resistance factor
Wool
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Summary:•Innovative thermal insulation panels based on waste materials were developed.•Dry cup method was validated with known permeability values.•Hygrothermal performance of panels made of waste materials was evaluated.•Water vapour resistance factor was experimentally measured. The hygrothermal performance of building materials is a very important issue for indoor comfort. The aim of this study is to measure the water vapour resistance factor μ of recycled waste materials. Leather cuttings, rice husk, and coffee chaff were used in order to manufacture innovative panels for thermal-noise building insulation. The permeability measurements were carried out by the dry cup method in compliance with the Standard EN ISO 12572. In the experimental campaign, conventional gypsum plaster and expanded polystyrene were also considered, whose hygrothermal characteristics are known from the Literature, in order to verify the reliability of the method. The moisture transfer properties of the innovative panels are higher than the values available in the Literature for other vegetable and mineral fibers-based panels (sheep wool, wood, cork, expanded vermiculite and perlite, glass or stone wool, and so on). However, the high μ-value obtained for coffee chaff panels (equal to 392) could involve an increase in heat loss and acoustically weak points.
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2020.127459