|
Title |
Utilization of Biochar as an Alternative Aggregate in Concrete:A State-of-the-Art Review
|
|
Authors |
정재용(Jae Yong Jeong) ; 우진석(Jin Seok Woo) ; 최원창(Won Chang Choi) ; 김선우(Sun Woo Kim) ; 박완신(Wan Shin Park) ; 윤현도(Hyun Do Yun) |
|
DOI |
https://doi.org/10.4334/JKCI.2025.37.4.517 |
|
Keywords |
바이오차; 바이오차 기반 콘크리트; 대체골재; 대체수준; 탄소격리 biochar; biochar-based concrete; alternative aggregate; replacement level; carbon sequestration |
|
Abstract |
Biochar has gained attention as an alternative material capable of simultaneously delivering carbon reduction effects and desirable physical properties as a construction material. Recent studies have extended its application beyond cementitious admixture to include partial replacement for both coarse and fine aggregates. This study critically reviewed 21 key publications, categorizing the use of biochar based on its substitution for coarse and fine aggregates. Incorporation rates ranged from 1 % to 40 % by weight or volume, with the resulting compressive strength varying depending on the replacement ratio and pyrolysis conditions. Biochar also demonstrated excellent carbon sequestration capacity, indicating its potential not only as a replacement material but also as a carbon-reducing construction resource. However, most studies have focused on mechanical performance and mix design properties, while research on long-term durability and constructability remains limited. In conclusion, biochar has been identified as a promising material capable of providing both structural performance and carbon storage. Nevertheless, further research is needed to establish standardization evaluation criteria and to validate its long-term performance for practical implementation.
|