Evaluation of mechanical behaviour of compost based biocover materials

Afshin Khoshand, Mamadou Fall

In the proceedings of: GeoManitoba 2012: 65th Canadian Geotechnical Conference

Session: M3C - GeoEnvironmental II

ABSTRACT: Landfills are considered one of the major sources of methane (CH4) emission, which is one of the abundant anthropogenic greenhouse gases. Landfill methane can be biologically oxidized when it passes through reactive biological cover soils or biocovers. The mechanical behaviour of biocovers can affect methane oxidation rate but limited researches have focused on mechanical behaviour of biocovers. This paper presents the results of a comprehensive experimental investigation on compost and compost-sand mixtures (3:1, 1:1, and 1:3 w/w) to evaluate the compaction, shear strength, and compressibility properties of compost based biocovers. From the direct shear tests, cohesion was found to vary from 2.1 to 19.7 kPa. Based on consolidation tests, coefficient of consolidation were in range of 1.71 to 0.63 m2/ year which is a function of moisture and organic content of samples.

RÉSUMÉ: 4) qui est un des principaux gaz à effet de serre anthropogénique. Le méthane peune couche de sol biologique et réactive appelée biorecouvrement. Le comportement mécanique du biorecouvrement lisées sur le effectuée sur du compost et des mélanges compost-sable pour évaluer le compactage, la résistance mécanique et la compressibilité de biorecouvrement basé sur du compost. Les résultats obtenus ont montré que la cohésion varie entre 2,1 et 19,7 kPa. En se référant aux tests de consolidation, des valeurs de coefficient de consolidation de 1,71 à 0,63 m2/an ont été notées. Ces valeurs sont fonction de la teneur en eau et matière organique des échantillons.

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Cite this article:
Afshin Khoshand; Mamadou Fall (2012) Evaluation of mechanical behaviour of compost based biocover materials in GEO2012. Ottawa, Ontario: Canadian Geotechnical Society.

@article{Paper256,author = Afshin Khoshand; Mamadou Fall,title = Evaluation of mechanical behaviour of compost based biocover materials,year = 2012}