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CONTAINMENT COMPOSITES

Containment composites are very low permeability synthetic membrane liners or barriers used with any geotechnical engineering related material so as to control fluid or gas migration in a man-made project, structure, or system. Containment composites are made from relatively thin continuous polymeric sheets electro-mechanically bonded with geotextiles one or both sides.

The geotextile is of nonwoven, needle-punched variety and is of relatively heavy weight. The geotextile provides increased resistance to puncture, tear propagation, and friction related to sliding, as well as providing tensile strength in and of themselves.

The use of geomembrane composite liners has increased over the years as traditional liners in construction industry. Whereas concrete, asphalt, as well as compacted clay soils, have proven ineffective in the prevention of fluid or gas migration into subsurface soils.

Applications of Containment Composites

  • As liners for potable water
  • As liners for reserve water (e.g., safe shutdown of nuclear facilities)
  • As liners for radioactive or hazardous waste liquid and sewage sludge
  • As liners for secondary containment of underground storage tanks
  • As liners for solar ponds
  • As liners for brine solutions
  • As liners for the agriculture industry
  • As liners for the aquiculture industry, such as fish/shrimp pond
  • As liners for primary, secondary and tertiary solid-waste landfills and waste piles
  • As liners for heap leach pads in advanced mining operations
  • As covers (caps) for solid-waste landfills
  • As covers for aerobic and anaerobic manure digesters in the agriculture industry
  • As liners for vertical walls: single or double with leak detection
  • As cutoffs within zoned earth dams for seepage control
  • As linings for emergency spillways
  • As waterproofing liners within tunnels and pipelines
  • As waterproof facing of earth and rockfill dams
  • As floating reservoir covers for preventing pollution
  • To contain and transport liquids in trucks
  • To contain and transport potable water and other liquids in the ocean
  • As a barrier to odors from landfills
  • As a barrier to vapors (radon, hydrocarbons, etc.) beneath buildings
  • To control expansive soils
  • To control frost-susceptible soils
  • To shield sinkhole-susceptible areas from flowing water
  • To prevent infiltration of water in sensitive areas
  • To conduct water flow into preferred paths
  • Beneath highways to prevent pollution from deicing salts
  • Beneath and adjacent to highways to capture hazardous liquid spills
  • As containment structures for temporary surcharges
  • To aid in establishing uniformity of subsurface compressibility and subsidence
  • Beneath asphalt overlays as a waterproofing layer
  • To contain seepage losses in existing above-ground tanks

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