Interface Transmissivity Measurement in Multicomponent Geosynthetic Clay Liners
Mesure de la transmissivité d'interface dans les géofilms netonitiques
Bannour, H. ; Touze-Foltz, N. ; Courté, A. ; Von Maubeuge, K.
Type de document
Chapitre d'ouvrage scientifique
Affiliation de l'auteur
IRSTEA ANTONY UR HBAN FRA ; IRSTEA ANTONY UR HBAN FRA ; IRSTEA ANTONY UR HBAN FRA ; NAUE GMBH AND CO ESPELKAMP-FIESTEL DEU
Résumé / Abstract
Three different multicomponent geosynthetic clay liners (GCLs) from different manufacturers are tested in a transmissivity cell with a new testing procedure to quantify the flow rate and the interface transmissivity between the coating or attached film presenting a hole and the upper geotextile of the GCL. The testing device was previously used in studies aiming to evaluate the interface transmissivity between a damaged geomembrane (GM) and a regular GCL. Different results are obtained regarding the evolution with the time of the flow rate ranging from 1.7310 11 m3/s to 2.1810 10 m3/s at steady state, which is on average in the range of flow rate results obtained with a GM–GCL composite liner. Additional tests performed by adding a GM on top give lower values of flow rates. This shows the importance of the film or coating rigidity for decreasing flow rate and insuring a better quality contact at the interface.
Current and Future Practices for the Testing of Multi Component Geosynthetic Clay Liners