A multi-scale study of water transfer through clayey geomaterials in landfill cap covers
Camille Barral, Irini Djeran-Maigre, Patrick Pierson, Gérard Didier
Abstract:
The cap cover of a municipal solid waste landfill, must ensure the containment of the wastes, control rainwater infiltrations and limit biogas leakage to the atmosphere. The specific characteristics of the cap cover are necessary to be maintained during all the lifespan of the landfill, despite the loadings to which it is subjected to: mechanical stresses, hydraulic load changes, physico-chemical variations and changes of climatic conditions. The water transfer through the clayey geomaterials, geosynthetic clay liners (GCL) installed as capping in landfill, is studied at three different scales. In-situ large scale experiments, laboratory experiments and intermediate scale experiments were conducted. Barriers remained effective after two years following installation. Percolation rates were less than 1% of the rainfall and the ion exchange in the GCL was 180 times lower than the initial. However, hydraulic conductivity increased slightly due to desiccation.
Keywords:
Geosynthetic Clay Liner, Landfill Cap Cover, Hydraulic Permeability, Lysimeter, Pilot Experiments, Cation Exchange, Laboratory Test
Download:
IMEKO-TC4-GEO-2016-12.pdf
DOI:
-
Event details
IMEKO TC:
TC4
Event name:
TC4 International Workshop on Metrology for Geotechnics 2016
Title:

1st IMEKO TC4 International Workshop on Metrology for Geotechnics

Place:
Benevento, ITALY
Time:
17 March 2016 - 18 March 2016
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