Abstract
Performance evaluation of environmentally friendly thermal insulation materials based on crushed straw and flax boon was determined by studying the physical parameters of thermal insulation in a climatic chamber and full-scale tests in buildings. In the climatic chamber at an air temperature of –20 °C, depending on the insulation moisture content, the thermal conductivity of the flax boon and straw slabs is 0.058 - 0.072 W/(m·°C), which is 27 - 31% lower than that of straw slabs equal to 0.08 - 0.105 W/(m·°C). With a relative air humidity of 50 - 95%, the moisture content of the flax boon and straw slabs varies within the range of 14 - 18.1% or less by 24% of the values of the crushed straw insulation. Under operating conditions, the thermal conductivity of the attic floor structure with flax boon and straw slabs corresponds to 0.07 W/(m·°C) at an air temperature of −20°C and is 22% less than the similar indicator of flooring with straw slabs equal to 0.09 W/(m·°C). A lower thermal conductivity of the floor structure with the use of flax boon and straw slabs provides an increase in temperature amplitude by 5 - 5.8 °C compared with the use of straw slabs. The results of studies in the climatic chamber and full-scale tests have confirmed the most effective operation of the flax boon and straw slabs as a thermal insulation material, which reduces energy consumption and, consequently, reduces financial costs for heating buildings.
Highlights
Traditional thermal insulation materials are obtained from polystyrene or natural mineral raw materials with high energy costs [1]
Studies of the thermo-technical parameters of straw and a mixture of straw and flax boon slabs in the climatic chamber have shown that thermal insulation materials most efficiently operate at temperatures below -5 °C
With a relative air humidity of 50 - 95%, the moisture content of the flax boon and straw slabs varies from 14% to 18.1% and is less by 24% of the crushed straw insulation value
Summary
Traditional thermal insulation materials are obtained from polystyrene (polystyrene foam slabs) or natural mineral raw materials with high energy costs (glass and rock wools) [1]. A significant reserve for thermal insulation materials production in various regions of the world is plant raw materials. The growing interest of the scientific community and industry is caused by experimental studies on hemp, straw, coconut, corn, sunflower, and wood to obtain thermal insulation [2]. A number of researchers [3,4,5,6,7,8,9] note that plant materials, such as hemp, cork waste, wood fibers, flax fiber and noils, rice husk, cotton fiber waste, can successfully compete with expanded polystyrene and rock wools in terms of thermal insulation properties
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: IOP Conference Series: Materials Science and Engineering
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
