TY - JOUR
T1 - Thermal transfer behavior of biochar-natural inorganic clay composite for building envelope insulation
AU - Lee, Hwayoung
AU - Yang, Sungwoong
AU - Wi, Seunghwan
AU - Kim, Sumin
N1 - Publisher Copyright:
© 2019 Elsevier Ltd
PY - 2019/10/30
Y1 - 2019/10/30
N2 - In the context of sustainable development, the use of eco-friendly building materials has been considered as a solution to environmental pollution problems caused by fossil fuels. In this study, novel bio-composite were prepared using biochar and natural inorganic clay (NIC) to evaluate the applicability of biochar to buildings. After preparing the rice husk, coconut shell, and bamboo biochar, these were mixed into NIC at four ratios to form a board, and their morphological, thermal, and moisture performance were analyzed. Through morphological analysis using field-emission scanning electron microscopy, the microstructure of each biochar was confirmed, and the shape of each biochar was confirmed in the bio-composite mixed with biochar. As a result of TCi analysis, it showed that the maximum rate of decrease of thermal conductivity was 67.21% by biochar. As a result of dynamic heat transfer analysis, it was confirmed that it is less sensitive to thermal change due to low thermal conductivity of biochar. Also, the CUP test showed that the water vapor resistance factor increased up to 22.58% when mixed with biochar, which means that the biochar can reduce water vapor permeability. In conclusion, biochar can be used to make environmentally friendly and energy efficient building materials.
AB - In the context of sustainable development, the use of eco-friendly building materials has been considered as a solution to environmental pollution problems caused by fossil fuels. In this study, novel bio-composite were prepared using biochar and natural inorganic clay (NIC) to evaluate the applicability of biochar to buildings. After preparing the rice husk, coconut shell, and bamboo biochar, these were mixed into NIC at four ratios to form a board, and their morphological, thermal, and moisture performance were analyzed. Through morphological analysis using field-emission scanning electron microscopy, the microstructure of each biochar was confirmed, and the shape of each biochar was confirmed in the bio-composite mixed with biochar. As a result of TCi analysis, it showed that the maximum rate of decrease of thermal conductivity was 67.21% by biochar. As a result of dynamic heat transfer analysis, it was confirmed that it is less sensitive to thermal change due to low thermal conductivity of biochar. Also, the CUP test showed that the water vapor resistance factor increased up to 22.58% when mixed with biochar, which means that the biochar can reduce water vapor permeability. In conclusion, biochar can be used to make environmentally friendly and energy efficient building materials.
KW - Bio-composite
KW - Biochar
KW - Building material
KW - Natural inorganic clay
KW - Thermal efficiency
UR - http://www.scopus.com/inward/record.url?scp=85068584784&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2019.06.215
DO - 10.1016/j.conbuildmat.2019.06.215
M3 - Article
AN - SCOPUS:85068584784
SN - 0950-0618
VL - 223
SP - 668
EP - 678
JO - Construction and Building Materials
JF - Construction and Building Materials
ER -