Geocomposites and Hybrid Geosynthetic Systems

Geocomposites combine two or more geosynthetic components — geotextile, geomembrane, geonet, geogrid, or GCL — into a single factory-assembled product optimising performance across multiple functions simultaneously. Drainage geocomposites (geonet core + nonwoven filter bonded faces) provide transmissivity of 5×10⁻⁴ to 10⁻² m²/s at 200–500 kPa overburden for retaining wall drainage and landfill gas collection at 40–50% reduced installation time versus separated layers. Composite reinforced geomembranes (HDPE geomembrane heat-bonded to woven PET geotextile, tensile strength 80–200 kN/m) provide combined barrier and reinforcement for steep-slope containment at tailings storage facilities. Prefabricated strip drains (PVD, polypropylene core 6–10 mm thick + nonwoven filter jacket, discharge capacity >100 m³/year at i=0.5, ISO 12257) replace sand drains for soft ground consolidation at 70–80% lower installation cost. Capillary barrier geocomposites (fine-grained upper layer over coarse drainage layer) divert lateral water flow in landfill caps without geomembrane, achieving percolation reduction of 90–95% in semi-arid climates. Reinforced geomembrane geocomposites for floating covers on water storage reservoirs (HDPE 1.0 mm + woven PET scrim, tensile strength 40–80 kN/m) resist wind uplift forces up to 1.5 kPa. Global geocomposite market exceeds $1.8 billion.