2. MATERIAL SPECIFICATIONS
2.1 Materials
The geomembrane shall be High-Density Polyethylene (HDPE) or Linear Low Density Polyethylene (LLDPE).
Gasket material shall be neoprene, closed cell medium,
1/4 inch thick, 2 inches wide with adhesive on one
side, as supplied by Poly-Flex, Inc., or other compatible gasket materials as required
Metal battens or banding and hardware shall be stainless steel.
Water cut-off mastic shall be Neoprene Flashing Cement as supplied by Poly-Flex, Inc., or as required.
Sealant shall be General Electric Silicone, RTV 103, or equivalent.
2.2 Geomembrane Raw Materials
The geomembrane shall be manufactured of polyethylene resins produced in the United States and shall be
compounded and manufactured specifically for the intended purpose. The resin manufacturer shall certify each
lot for the following properties.
The natural polyethylene resin without the carbon black shall meet the following requirements:
| Property |
Test Method |
HDPE
Requirements |
LLDPE (VFPE)
Requirements |
|
| Density,g/cc |
ASTM D 1505 or ASTM D 792 |
0.935 - 0.940 |
0.915 - 0926 |
| Melt Index,g/10 min. |
ASTM D 1238 Condition E |
< 0.4 |
< 0.6 |
2.3 Rolls
The geomembrane shall be a minimum 23.0 ft seamless width, as manufactured by Poly-Flex, Inc. (2000 W. Marshall Dr., Grand Prairie, TX 75051, 888-765-9359). Carbon black shall be added to the resin if the resin is not compounded for ultra-violet resistance.
The surface of the smooth geomembrane shall not have striations, roughness, pinholes, or bubbles.
The geomembrane shall be supplied in rolls. Labels on each roll shall identify the thickness of the material, the length and width of the roll, lot and roll numbers, and name of manufacturer.
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