The Use of Modified Scots Pine Bark as Filling Material of Heat and Sound Insulation

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UDС

674.8

DOI:

10.17238/issn0536-1036.2019.2.111

Abstract

The purpose of this work is studying the thermophysical and acoustic properties of modified Scots pine bark (Pinus sylvestris L.) for the use as heat and sound insulation filling material. Bark modification was carried out by mechanical activation of plant material with the use of a planetary ball mill, then drying of the plant material and its treatment with water suspension containing fine-dispersed basalt particles of 150 nm average size. Samples were homogenized and dried again. It has been found that the bark fraction of 0.5–1 mm is optimal as filling insulation. Treatment with basalt suspension of such bark makes it possible to obtain material with the following characteristics: bulk density ρbulk = 313 kg/m³; coefficient of heat conductivity λ = 0.0651 W/(m·K); airborne sound insulation index Rw = 28.5 dB. The values of these parameters are comparable with the similar characteristics of the widely used insulation materials. In addition, it was determined that significant increase of the specific surface area of the material occurs during bark modification at the same time the volume of open pore space is reducing by 15.5 %. Thus, the modified pine bark can be recommended for the use as filling insulation in non-residential industrial and agricultural premises. Funding: The studies were carried out with the financial support of the RFBR grant no. 18-43-292002.
For citation: Danilov V.E., Ayzenshtadt A.M. The Use of Modified Scots Pine Bark as Filling Material of Heat and Sound Insulation. Lesnoy Zhurnal [Forestry Journal], 2019, no. 2, pp. 111–118. DOI: 10.17238/issn0536-1036.2019.2.111

Authors

V.E. Danilov, Postgraduate Student, Senior Lecturer F-4931-2017, 0000-0002-5013-5339
A.M. Ayzenshtadt, Doctor of Chemical Sciences, Professor F-5339-2017, 0000-0003-2904-2549

Affiliation

Northern (Arctic) Federal University named after M.V. Lomonosov, Naberezhnaya Severnoy Dviny, 17, Arkhangelsk, 163002, Russian Federation; e-mail: v.danilov@narfu.ru, a.isenshtadt@narfu.ru

Keywords

bark and wood waste disposal, mechanical activation, modification of plant raw materials, fine-dispersed basalt, heat conductivity, heat capacity, airborne sound insolation index

Funding

The studies were carried out with the financial support of the RFBR grant no. 18-43-292002

For citation

Danilov V.E., Ayzenshtadt A.M. The Use of Modified Scots Pine Bark as Filling Material of Heat and Sound Insulation. Lesnoy Zhurnal [Forestry Journal], 2019, no. 2, pp. 111–118. DOI: 10.17238/issn0536-1036.2019.2.111

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Received on December 22, 2017