Author(s): Hwayoung Lee, Seunghwan Wi, Jongki Lee, Sungwoong Yang, Sumin Kim
Paper category: Proceedings
Book title: Proceedings of the 3rd International Conference on Bio-Based Building Materials ICBBM 2019
Editor(s): Mohammed SONEBI and Sofiane AMZIANE
e-ISBN: 978-2-35158-229-9
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 733 - 734
Total Pages: 2
Language: English

Abstract: The eco-friendly materials have occupied a significant portion of the building industry for decades.
Among them, bio-based materials contribute to solving environmental problems because they
reduce CO2 consumption. Biochar, which is pyrolyzed biomass, is used in various fields, and it
has thermal and moisture control ability because it is a porous material. In this study, inorganic
bio-based composites were prepared by applying biochar to gypsum board with excellent fire
resistance and thermal properties. The composites were prepared by mixing 1, 2, 5, and 10 wt%
of rice husk, coconut shell, and bamboo biochar in gypsum, respectively, and analyzed for thermal
and moisture performance. TCi thermal conductivity analysis showed that the thermal conductivity
of the bio-composite was decreased by the pores of the biochar, and the maximum reduction was
67.21%. In addition, the thermal performance of the bio-composite was analyzed by a dynamic
heat transfer analysis device. As a result, it was confirmed that when the biochar was mixed, the
variation range with respect to the temperature change was small. When the sum of the

temperature changes over time was calculated, the values were decreased in all the bio-
composite, and the highest reduction rates of 29.32%. Finally, the water vapour resistance factor

(μ-value) of bio-composite was calculated using a Cup test according to ISO 12572. As a result, it
was confirmed that the water vapor resistance performance was improved by the water storage
ability of pores in biochar. In conclusion, bio-composites are expected to be used as eco-friendly
building materials for energy conservation.

Online publication: 2019
Publication type: full_text
Public price (Euros): 0.00

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