Effects of biochar on shear strength of completely decomposed granite.
Bio-engineered slope
Biochar amendment
Biochar type
Completely decomposed granite
Grain crushing
Shear strength
Journal
Environmental science and pollution research international
ISSN: 1614-7499
Titre abrégé: Environ Sci Pollut Res Int
Pays: Germany
ID NLM: 9441769
Informations de publication
Date de publication:
Jul 2022
Jul 2022
Historique:
received:
07
02
2022
accepted:
04
05
2022
pubmed:
14
5
2022
medline:
9
7
2022
entrez:
13
5
2022
Statut:
ppublish
Résumé
Biochar has a great potential to sustainably improve the performance of bio-engineered slope due to its ability to retain water and to supply nutrients. Existing studies mainly focus on hydrological properties of biochar-amended soil. However, the effects of biochar on shear strength of soil are not well studied. This study aims to assess the shearing behaviour of biochar-amended completely decomposed granite (CDG). Soil specimens were prepared by mixing CDG with two types of biochar at a mass ratio of 5% and compacted at 95% of the maximum dry density. Although the peak shear strength of biochar-amended CDG is reduced by up to 20% because of lower initial dry density of the soil and crushing of biochar particles during shearing, both types of biochar have negligible effects on the ultimate shear strength, which is governed by friction between soil particles. This highlights that the ultimate friction angle can be adopted for designing bio-engineered slopes using biochar-amended soils.
Identifiants
pubmed: 35554808
doi: 10.1007/s11356-022-20707-y
pii: 10.1007/s11356-022-20707-y
doi:
Substances chimiques
Soil
0
Soil Pollutants
0
biochar
0
granite
0
Charcoal
16291-96-6
Silicon Dioxide
7631-86-9
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
49422-49428Subventions
Organisme : National Natural Science Foundation of China
ID : 51778166
Organisme : Environment and Conservation Fund
ID : ECWW19EG01
Organisme : Research Grants Council, University Grants Committee
ID : AoE/E-603/18
Organisme : Research Grants Council, University Grants Committee
ID : HKPFS
Informations de copyright
© 2022. The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
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