Mass Transport and Thermal Conductivity Properties of Flax Shives for Use in Construction Industry

ABSTRACT

The paper presents the results of studies concerning raw flax shives obtained from Polish crop of flax as a loose-fill thermal insulation material. The study focusses mainly on measurements of the thermal conductivity and water vapor permeability of material, but on water absorption and capillary rise as well. The shives showed satisfactory lambda values, comparable to traditional thermal insulation materials. They also showed high mass absorptivity and the ability to uptake large amounts of water by capillary action in a short time. The paper presents also an example of the use of the tested material as thermal insulation of the flat roof. The analysis of the heat flow through the flat roof with different thicknesses of flax shives insulation was carried out.

摘要

本文介绍了亚麻亚麻原料作为松散填充绝热材料制备的亚麻原料的研究结果. 研究主要集中在材料的热导率和水蒸气透过率的测量上，而对材料的吸水率和毛细上升率的测量上. 与传统的隔热材料相比，SHIVES显示出令人满意的λ值. 它们也表现出高的质量吸收率和在短时间内通过毛细作用吸收大量水的能力. 文中还介绍了一个利用被测材料作为平顶保温材料的实例. 对不同厚度的亚麻垫片隔热层的热流进行了分析.

KEYWORDS:

• Flax shives
• density
• thermal conductivity
• water vapor permeability
• absorptivity
• building partitions

关键词:

• 亚麻屑
• 密度
• 热导率
• 水蒸气渗透性
• 吸收率
• 建筑隔墙