Abstract
In the last two decades intensive grow of industry of building materials from renewable resources is observed. Such situation is related to some aspects: global warming, environmental pollution, impact on human health, environmental impact of materials at their end-of-life. In current study development of thermal insulation materials from hemp and polylactide fibres are analysed. While main parameter for thermal insulation materials is thermal conductivity, rational density of composite 40 kg/m3 was chosen. For experiments 11 compositions were prepared. One composition was prepared just with hemp and polylactide fibres, five compositions with different amount of hydrophobic agent and 5 compositions with different amount of fire retardant. Experimentally thermal conductivity, sound absorption coefficient, short-term water absorption, fire resistance, water vapour transfer properties and compressive strength were determined. Rational amount of hydrophobic agent and fire retardants was chosen.
Highlights
The use of thermal insulation materials dates back to 3000 years ago, when straw was reinforced with clay and used to build walls (Spiridon 2014)
In current time the European market of insulating materials is characterized by the domination of two types of products, namely inorganic fibrous materials, glass wool and stone wool, which account for 60% of the market, and organic foamy materials, expanded and extruded polystyrene and to a lesser extent polyurethane, which account for some 27% of the market (Papadopoulos 2005)
Aim of this paper is to develop thermal insulation material from hemp fibres and polylactide fibres having low thermal conductivity, high sound absorption coefficient, low water absorption and flammability, good water vapour transfer properties
Summary
The use of thermal insulation materials dates back to 3000 years ago, when straw was reinforced with clay and used to build walls (Spiridon 2014). Materials based on natural resources, like reed grass, straw, hay, linen, hemp or lichens have been used for thermal insulation purposes for ages. These materials were often located on the building envelope; certain kinds of green facades and roofs can be seen with lichens. A wide range of insulation materials made from natural fibers is already being produced for different application areas (Müssig 2010; Papadopoulos 2005): insulating felts, panel absorbers, blowing insulation, pouring insulation, impact sound insulation materials and ceiling panels, mats and boards. Aim of this paper is to develop thermal insulation material from hemp fibres and polylactide fibres having low thermal conductivity, high sound absorption coefficient, low water absorption and flammability, good water vapour transfer properties
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