Biochar-red clay composites for energy efficiency as eco-friendly building materials: Thermal and mechanical performance

Sungwoong Yang, Seunghwan Wi, Jongki Lee, Hwayoung Lee, Sumin Kim

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)


Biochar and red clay were used to develop eco-friendly building materials with improved thermal and mechanical performance. Rice husk, coconut shell, and bamboo were prepared by thermally decomposing as biochar. Thermal conductivity measurements, scanning electron microscopy imaging, compressive strength measurements, and an infrared heat transfer experiment were performed, and the results showed that the mixture of biochar tends to lower the thermal conductivity. The compressive strength of specimens mixed with rice husk decreased, but that of specimens mixed with coconut shell and bamboo tended to increase. The infrared heat transfer test showed that the thermal performance of the mixed rice husk specimens was significant, while the specimen mixed with coconut shell and bamboo showed thermal performance improvement. A comprehensive evaluation of the improvement in thermal performance and strength indicated that a 10 wt.% mixture of bamboo was the most effective. Therefore, it was possible to effectively determine the type and weight ratio of biochar to red clay binder an important step in the study of biochar and red clay building materials.

Original languageEnglish
Pages (from-to)844-855
Number of pages12
JournalJournal of Hazardous Materials
Publication statusPublished - 2019 Jul 5

Bibliographical note

Funding Information:
This research was supported by a grant ( 19RERP-C146906-02 ) from Residential Environment Research Program funded by Ministry of Land, Infrastructure and Transport of Korean goverment . This research was supported by the Yonsei University Research Fund of 2018 ( 2018-22-0193 ).

Publisher Copyright:
© 2019 Elsevier B.V.

All Science Journal Classification (ASJC) codes

  • Environmental Engineering
  • Environmental Chemistry
  • Waste Management and Disposal
  • Pollution
  • Health, Toxicology and Mutagenesis


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