Geosynthetic Design Parameters: GCL
Geosynthetic engineering design parameters per AASHTO M288-21, FHWA NHI-07-092, and GRI standards — geotextiles (woven, nonwoven), geogrids (uniaxial, biaxial, triaxial), geomembranes (HDPE, LLDPE, PVC), GCL, geocomposite drains, and erosion control mats with tensile strength, reduction factors, hydraulic properties, and survivability classes
| product type | application class | application | chemical resistance | elongation at break pct min | expected design life years (years) | hydraulic conductivity m per s (m/s) | mass per unit area g per m2 typical (g/m2) | notes | reduction factor creep (dimensionless) | reduction factor durability (dimensionless) | reduction factor installation damage (dimensionless) | tensile strength kN per m typical (kN/m) | test methods | thickness mm typical (mm) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| GCL | barrier#6.0mm | barrier | Resistant to DI water and dilute inorganic solutions; check chemical compatibility for leachate and organic compounds | 20 | 50 | 0 | 5,000 | GCL needle-punched; total mass ~5000 g/m2; bentonite mass ~4000 g/m2; hydraulic conductivity 1e-9 m/s (1e-7 cm/s) with DI water; peel strength 65 N/m min per GRI GCL-5; internal shear phi=24 deg typical; equivalent to ~600 mm compacted clay barrier | 1 | 1.05 | 1.1 | 15 | ASTM D6243 (internal friction); ASTM D5887 (flux/hydraulic conductivity); ASTM D6495 (peel strength); ASTM D5261 (mass/area); GRI GCL-5 | 6 |
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