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DEVELOPMENT OF WET-PRESERVED HEMP FIBREBOARD WITH THERMAL AND SOUND INSULATION PROPERTIES

Edgars Kirilovs

Abstract

Energy and raw material costs, an increase in environmental pollution, greenhouse gas emissions, global warming, depletion of fossil raw materials stimulate to seek and study alternatives to the synthetic fibres and products made of them for full or partial replacement. Renewable raw materials, including natural fibre sources, are the future of storage resources with a variety of positive effects on both the planet ecosystem and the living and working environment, and the energy consumption of delivering the required functionality. One of the most important energy-saving types is to reduce energy consumption in buildings by insulating them. Current insulation puts significant strain on the environment both during the production of the material and after it has finished its service in the structure. One of the most frequently mentioned industrial hemp raw materials positive qualities are their very wide use, practically all plant parts can be used in production of different products. Hemp fibers/shives mix boards can fulfil the main function of insulation materials, i.e., to reduce the transmission of heat and sound, because they have a porous structure and low density. Material thermal and sound insulation properties affect physical and structural properties of compounds. Cost effective particles board samples from chopped hemp stems with two types of adhesives and different thicknesses were produced and their thermal conductivity and sound absorption evaluated. The technologies applied and test results will be discussed in the paper. The article describes a new type of insulation fibre boards developed in cooperation with ATB (The Leibniz Institute for Agricultural Engineering and Bioeconomy) by using a new method of raw material preparation and specific production technologies of ATB. The samples are made of raw materials with different wet-preservation time and varying types of binder. For the first time there is used main raw material with short time wet-preservation. On ATB?s experimental processing line low density 355±10 kg/m3 board samples are produced and the tests are performed to determine such parameters as thermal conductivity and sound absorption.

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DOI resolver: doi.org/10.5593/sgem2019/6.2/s26.010

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