Collaborative Project on the Long-Term Performance of Barrier Systems

ISSUES BEING EXAMINED (see publication list for published work)

GCLs in composite liners:

• moisture uptake of GCLs
• water retention curve of GCLs

GCLs in composite liners subjected to temperature cycles:

• moisture content of GCLs in the field with time
• field shrinkage of different GCLs in an exposed composite liner
• effect of GM wrinkles on GCL shrinkage
• effect of sample size and aspect ratio on GCL shrinkage
• effect of GCL manufacture (type) on shrinkage

GMs:

• Number and interconnectedness of wrinkles observed in the field
  • effect of climatic condition
  • effect on  leakage through composite liners
• Effect of liner configuration and temperature on long-term performance of secondary liners
• Diffusion of VOCs through GMs
• Effect on long-term performance of HDPE GMs of:
  • leachate composition
  • liner configuration
  • physical stress
  • temperature
  • presence of wrinkles
  • protection layer