Biochar as Cement Replacement to Enhance Concrete Composite Properties: A Review

In recent years, concrete has been accessible and economical in the construction industry, resulting in high demand for its components. Cement is known for its negative impact on the environment, which has led researchers to investigate alternative supplementary materials. Recently, biochar has been...

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Bibliographic Details
Published in:Energies (Basel) 2022-10, Vol.15 (20), p.7662
Main Authors: Aman, Aan Mohammad Nusrat, Selvarajoo, Anurita, Lau, Teck Leong, Chen, Wei-Hsin
Format: Article
Language:English
Subjects:
biochar
biochar concrete composites
Biomass
Carbon
carbon sequestering
Cement
Charcoal
Composite materials
Compressive strength
Concrete
Concrete mixing
Concrete properties
Construction industry
economical
Energy consumption
Mechanical properties
Sequestering
supplementary cementitious materials
Sustainable materials
Tensile strength
Underground construction
Water absorption
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Summary:In recent years, concrete has been accessible and economical in the construction industry, resulting in high demand for its components. Cement is known for its negative impact on the environment, which has led researchers to investigate alternative supplementary materials. Recently, biochar has been proposed as a replacement to cement in small amounts, with an optimum amount of 0.08–5, resulting in increased strength and enhancement of other properties of concrete composites. The biochar production process and its components are more economical and environmentally friendly than that of cement. In this review, we focus on research highlighting the properties of biochar that aid in the enhancement of biochar mortar and concrete composite properties. We explore properties of biochar such as water absorption, as well as compressive, flexural and tensile strength. Progress has been made in research on biochar concrete composites; however, additional investigations are required with respect to its carbon-sequestering abilities and life cycle assessment for its production process.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15207662