Classification and quantification of downslope erosion from a geosynthetic clay liner (GCL) when covered only by a black geomembrane

Field observations of downslope bentonite erosion from a geosynthetic clay liner (GCL) covered by only a black geomembrane are reported for a composite liner left exposed without a protective soil cover for much longer than recommended by the GCL manufacturer. A new nondestructive, light-transmission technique developed to investigate bentonite erosion features in the field is presented. A classification system is developed to describe the type of erosion features observed. Results from five field investigations at the Queen’s University Environmental Liner Test Site (QUELTS II) are reported to quantify the onset, progression, and severity of downslope erosion for one particular geotextile-encased, needle-punched GCL for exposure periods of between 7 weeks and 1.3 years. The first significant erosion feature (type “E”with bentonite loss narrower than 2.5 cm) was observed after 6 months of exposure. Irrecoverable erosion features (type “EE” with bentonite loss wider than 2.5 cm) were observed after 12 mont...

[1]  R. K. Rowe,et al.  Observations of bentonite erosion from solar-driven moisture migration in GCLs covered only by a black geomembrane , 2015 .

[2]  R. K. Rowe,et al.  Thermal exposure conditions for a composite liner with a black geomembrane exposed to solar radiation , 2015 .

[3]  W. Andy Take,et al.  Thirty-Sixth Canadian Geotechnical Colloquium: Advances in visualization of geotechnical processes through digital image correlation1 , 2015 .

[4]  W. A. Take,et al.  Factors affecting the down-slope erosion of bentonite in a GCL ☆ , 2014 .

[5]  W. A. Take,et al.  Laboratory Simulation of Bentonite Erosion by Downslope Flow on a GCL , 2014 .

[6]  Jinchun Chai,et al.  Self healing capacity of geosynthetic clay liners and influencing factors , 2013 .

[7]  R. Rowe,et al.  Potential for Desiccation of Geosynthetic Clay Liners Used in Barrier Systems , 2013 .

[8]  R. K. Rowe,et al.  Prediction of geosynthetic clay liner desiccation in low stress applications , 2013 .

[9]  W. A. Take,et al.  Physical modelling of nonwoven/nonwoven GCL shrinkage under simulated field conditions , 2013 .

[10]  R. Rowe,et al.  Leakage and Contaminant Transport through a Single Hole in the Geomembrane Component of a Composite Liner , 2013 .

[11]  David Airey,et al.  Modelling of thermally induced desiccation of geosynthetic clay liners in double composite liner systems , 2012 .

[12]  Dominique Guyonnet,et al.  Influence of subgrade, temperature and confining pressure on GCL hydration , 2012 .

[13]  A. El-Zein,et al.  Three-dimensional finite-element analyses of seepage and contaminant transport through composite geosynthetics clay liners with multiple defects , 2012 .

[14]  R. K. Rowe,et al.  Numerical investigation of transient hydration of unsaturated geosynthetic clay liners , 2012 .

[15]  Mohammad T. Rayhani,et al.  Laboratory investigation of GCL hydration from clayey sand subsoil , 2012 .

[16]  R. Kerry.  Short- and long-term leakage through composite liners. The 7th Arthur Casagrande Lecture1 1This lecture was presented at the 14th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, Toronto, Ont., October 2011, and a pre-print appeared in the conference proceedings. , 2012 .

[17]  David Airey,et al.  Laboratory investigation of thermally induced desiccation of GCLs in double composite liner systems , 2011 .

[18]  Richard W I Brachman,et al.  Factors affecting GCL hydration under isothermal conditions , 2011 .

[19]  W. A. Take,et al.  GCL hydration under simulated daily thermal cycles , 2011 .

[20]  W. A. Take,et al.  Water-Retention Behavior of Geosynthetic Clay Liners , 2011 .

[21]  R. K. Rowe,et al.  Anisotropy and directional shrinkage of geosynthetic clay liners , 2010 .

[22]  G. N. Richardson,et al.  Concern for GCL Shrinkage when Installed on Slopes , 2008 .

[23]  Nathalie Touze-Foltz,et al.  Laboratory investigation of flow rate through composite liners consisting of a geomembrane, a GCL and a soil liner , 2006 .

[24]  Richard Thiel,et al.  Laboratory measurements of GCL shrinkage under cyclic changes in temperature and hydration conditions. , 2006 .

[25]  R. Rowe.  Long-term performance of contaminant barrier systems , 2005 .

[26]  R. Kerry Rowe,et al.  Laboratory Investigation of Geosynthetic Clay Liner Desiccation in a Composite Liner Subjected to Thermal Gradients , 2005 .

[27]  R. Brachman,et al.  Barrier Systems for Waste Disposal Facilities , 2004 .

[28]  R. Rowe,et al.  Effect of GCL and subgrade type on internal erosion in GCLs under high gradients , 2003 .

[29]  T. Egloffstein.  Natural bentonites—influence of the ion exchange and partial desiccation on permeability and self-healing capacity of bentonites used in GCLs , 2001 .

[30]  G. L. Sivakumar Babu,et al.  Self-Healing Properties of Geosynthetic Clay Liners , 2001 .

[31]  R. Rowe,et al.  Swelling characteristics of needlepunched, thermally treated geosynthetic clay liners , 2000 .

[32]  Francesco Mazzieri,et al.  Permeability of Damaged Geosynthetic Clay Liners , 2000 .

[33]  L. Philip,et al.  Problems of clay desiccation in composite lining systems , 1999 .

[34]  T. Pelte,et al.  Thermal Analysis of Geomembrane Exposed to Solar Radiation , 1994 .