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Tear resistance of a geomembrane becomes important when it is exposed to high winds or handling stress during installation. There are various ASTM methods for measuring tear resistance of geomembranes, with most common reports using ASTM D1004. Typical tear resistances show a value of 40 to 45 lb for 60-mil HDPE and 50 to 60 lb for 80-mil HDPE ...
Geomembrane installation as part of the construction of a base liner system of a landfill [2] Geomembranes have been used in the following environmental, geotechnical, hydraulic, transportation, and private development applications: As liners for potable water; As liners for reserve water (e.g., safe shutdown of nuclear facilities)
HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]
Pond liner for a garden pond A pond liner is an impermeable geomembrane used for retention of liquids, including the lining of reservoirs , retention basins , hazardous and nonhazardous surface impoundments, garden ponds and artificial streams in parks and gardens.
These molecules are several orders of magnitude longer than those of familiar high-density polyethylene (HDPE) due to a synthesis process based on metallocene catalysts, resulting in UHMWPE molecules typically having 100,000 to 250,000 monomer units per molecule each compared to HDPE's 700 to 1,800 monomers.
Cold bending relates to the ability to use and manipulate the geomembrane in cold conditions. Water Permeability: ASTM E 96: m/s < 6.10⁻¹⁴: The extremely low water permeability of a BGM aligns with the high standards typical of geomembranes. Gas Permeability (Methane Transmission Rate) ASTM D 1434-82: m³/(m 2.d.atm) < 2.10⁻⁴