Application of biochar in concrete – A review

Sachini Supunsala Senadheera, Souradeep Gupta, Harn Wei Kua, Deyi Hou, Sumin Kim, Daniel C.W. Tsang, Yong Sik Ok

Research output: Journal article publicationJournal articleAcademic researchpeer-review

11 Citations (Scopus)

Abstract

The continuous rise in global temperatures is an evidence of climate change. CO2 emissions have caused major problems owing to its contribution to climate change. In particular, the construction industry has a considerable carbon footprint. Therefore, investigations into climate change mitigation are indeed a priority. All steps in the construction process, from raw materials preparation to cement production, contribute to CO2 emissions. This can be mitigated to a certain extent by incorporating bio-based constituents into construction materials. However, bio-based materials may negatively affect cement reaction and structural performance, despite their positive environmental impacts. Biochar, a carbon-rich product of biomass pyrolysis, is considered a potential substitute for cement replacement that can enhance structural properties if used in appropriate amounts. Although biochar has conventionally been used as a soil amendment in the agricultural industry, researchers have recently investigated its applicability in concrete. Importantly, the results thus far have reported its contribution to the enhancement of the mechanical, thermal, and physical properties of cement. This review provides a comprehensive overview of the physicochemical properties of biochar added cementitious materials, including the fresh and hardened properties of biochar-cement mixtures considering both environmental and economic aspects.

Original languageEnglish
Article number105204
JournalCement and Concrete Composites
Volume143
DOIs
Publication statusPublished - Oct 2023

Keywords

  • Biochar
  • Carbon neutrality
  • Cement composites
  • Climate change mitigation
  • Construction materials
  • Pyrolysis

ASJC Scopus subject areas

  • Building and Construction
  • General Materials Science

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