Thermal Conductivity Investigation of Composite From Hemp and Peat Fibres

Abstract

A large number of energy inefficient buildings were constructed without taking into account the principles of green building, which requires efficient utilization of local resources. In this work hemp and peat fibres were used in order to produce effective ecological thermal insulating material. Tests were carried out using short dishevelled hemp and chopped peat fibres. Effective composites from local renewable resources were produced. Macro-and microstructures of composites as well as hemp and peat fibres have shown that activated peat allows getting ecological binder for insulating materials. Hemp and peat fibres are orientated chaotically and fibres consist of many yarns. Investigations have shown that thermal conductivity of natural fibres depends on material density and structure.

The Influence of the Relative Content of Peat and Mineral Binder on Thermal Insulation Composite Performance Characteristics

“…Increasing in quicklime content further from 50.0 to 58.0% (Samples 6 and 7) caused slight thermal conductivity changes. The residual amount of liquid vapors in the pores and the specific density of the samples had a great influence on the thermal conductivity, matching behavior observed by Stapulionienė et al (2015). The thermal conductivity for Samples 1, 2, and 3 was lower than the conductivity specified by Russian State Standard GOST 4861-74 (GOST 4861-74).…”

Potential of Baltic Region Peat in High Added-value Products and Environmentally Friendly Applications - A Review

“…Thermal conductivity values of specimens From peat fibres is approximated from 0.0440 W•m -1 •K -1 to 0.0379 W•m -1 •K -1 , when the density ranges from 41.2 kg•m -3 to 68.2 kg•m -3 . Produced composite from hemp and peat fibres had a density varying from 173 kg•m -3 to 186 kg•m -3 and thermal conductivity ranging from 0.0436 W•m -1 •K -1 to 0.0481 W•m -1 •K -1 , respectively [144].…”