Evaluation of thermal properties of phase change material-integrated artificial stone according to biochar loading content

Young Uk Kim, Beom Yeol Yun, Jihee Nam, Ji Yong Choi, Seunghwan Wi, Sumin Kim

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)


Biochar is biomass that has undergone pyrolysis and contains many pores; therefore, it can effectively be used as a building material. This experiment aims to improve the thermal performance of artificial stone finishes used as interior veneers. A phase change material (PCM) with a high latent heat performance and biochar, an eco-friendly material, were used in the experiment. n-Octadecane was incorporated into lightweight aggregates; spruce tree, rise husk, and miscanthus straw biochars were utilized. The strength performance of specimens using biochar was found to be slightly degraded when 6% biochar was incorporated, and biochar use within 4% was found to yield similar or higher strength results. Moreover, the thermal conductivity decreased as the amount of biochar in the mixture increased; these thermal conductivity characteristics depended on the pore characteristics of the biochar type. It was demonstrated that the use of 6% biochar reduced the peak temperature of the specimen by 4–5 °C. Using biochar that reuses waste can have environmental benefits; biochar can facilitate efficient use of thermal energy and indoor temperature control when used in combination with PCM.

Original languageEnglish
Article number124682
JournalConstruction and Building Materials
Publication statusPublished - 2021 Oct 25

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIT)(No. 2021R1A4A1032306 ).

Publisher Copyright:
© 2021 Elsevier Ltd

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)


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