Functions: Seepage-proof, isolation applications: Refuse landfill, sewage or offscum disposal plant seepage-proofing. embankment, lake dam, tailings dams, sewage dam and reservoir area, channels, hydraulic accumulating pond (pit, mine). Subway, basements and tunnels, tunnel anti-seepage lining. Roadbed and other foundation salt marsh seepage-proofing. Horizontal impervious blanket in the front of dyke and dam, foundation vertical impervious barrier, the construction cofferdam, waste storage. Seawater, freshwater farms. Roads, highways, railways foundation; expansive soil and waterproof layer of collapsible loess. Roofing seepage-proofing. Product: Including LDPE geomembrane, LLDPE geomembrane, HDPE geomembrane, EVA geomembrane, ECB geomembrane, PVC geomembrane, matte geomembrane. PVC geomembrane technical index serial number items I Type II Type 1 tensile strength ≥ 8. 0 12. 0 2 breaking elongation rate % 200 250 3 heat treatment dimensional change rate % 3. 0 2. 0 4 low temperature buckling ℃ -20 ℃ flawless -25 ℃ flawless 5 puncture resistance 6 imperviousness impermeable
Introduction of geomembrane Geomembrane can be divided into three categories: Geomembrane, reinforced geomembrane and composite geomembrane. Geomembrane density is not less than 9.0kg / m3, whose maximum elongation rate is not lower than 300%, frost resistance is not lower than -60 deg.] C, stability is not less than that of the 2% carbon black mixted in polyethylene. Reinforced geomembrane is reinforced in the film, reinforcement material is generally geotextile, nylon yarn cloth or canvas, which can be made into one cloth two membranes, two cloths three membranes, three cloths four membranes according to engineering requirements. Composite geomembrane is made by hot-pressing or binding with adhesives the membrane and acupuncture geotextile, which can be made into one cloth one membrane and two cloths one membrane according to engineering requirements. Geotextile prevents geomembrane from being punctured by contacted gravels, from being damaged by people and mechine when laying, and from damage during transportation; and at the same time it has dewatering effect, dewatering the infiltration water under membrane or pore water, accelerating consolidation of soft soil under membrane, and improving the friction coefficient of contact surface with the sandy gravel. So composite geomembrane is the optimal seepage-proof material for earth and rockfill dam.
