Open AccessPhysical properties of insulation materials based on straw and flax boon
Author(s) -
А. А. Бакатович,
Nadezhda Bakatovich,
V. B. Mel’nikov
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/896/1/012112
Subject(s) - straw , thermal insulation , moisture , composite material , materials science , relative humidity , water content , thermal conductivity , air temperature , environmental science , agronomy , engineering , meteorology , geotechnical engineering , geography , layer (electronics) , biology
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.