Journal
WASTE AND BIOMASS VALORIZATION
Volume 12, Issue 2, Pages 913-923Publisher
SPRINGER
DOI: 10.1007/s12649-020-01051-z
Keywords
Hemp biomass; Biofuel; Hemp ash; Supplementary cementing materials; Cement; Concrete; Incineration
Categories
Funding
- Natural Sciences and Engineering Research Council of Canada (NSERC) [EGP 533732-18]
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This study investigates a two-step valorization strategy for hemp waste, using it as biofuel and incorporating the by-product hemp ash into concrete as a partial cement replacement, showing potential for reducing environmental impact and costs.
The growing interest in industrial applications of the hemp plant requires alternative solutions for disposing of hemp waste. At the same time, the concrete industry is seeking ways to reduce its environmental impact, which could be realized by partially replacing Portland cement with more sustainable materials. In this study, a two-step valorization strategy of hemp waste is explored, including the use of hemp waste as biofuel and the addition to concrete of the biofuel by-product, hemp ash, as partial cement replacement. Hemp waste was incinerated in a muffle furnace at different combustion regimes and the residual hemp ash was analyzed before being added to some concrete mixes. Concretes with different hemp ash replacements (5-25% by cement weight) were tested for compression strength, air content, workability, and water absorption. Results showed that hemp ash has the potential to be added to concrete as a filler to reduce environmental impact and costs at 5% cement replacement. [GRAPHICS]
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