Abstract 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.

中文翻译：

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来自不同废物的创新建筑材料的水蒸气渗透性

摘要 建筑材料的湿热性能是影响室内舒适度的一个非常重要的问题。本研究的目的是测量回收废料的水蒸气阻力系数 μ。皮革切屑、稻壳和咖啡糠被用来制造用于隔热建筑隔热的创新面板。渗透率测量采用符合 EN ISO 12572 标准的干杯法进行。 在实验过程中，还考虑了常规石膏灰泥和发泡聚苯乙烯，其湿热特性从文献中获知，以验证可靠性的方法。创新面板的水分传递特性高于文献中其他植物和矿物纤维面板（羊羊毛、木、软木、膨胀蛭石和珍珠岩、玻璃或石棉等）。然而，咖啡箔板获得的高 μ 值（等于 392）可能涉及热损失和声学弱点的增加。