Composite geomembrane
1: isolation, Use polyester staple fiber needled geotextile to isolate building materials with different physical properties (particle size, distribution, consistency and density, etc.), such as soil and sand, soil and concrete. To separate two or more materials Loss, not mixed, maintain the overall structure and function of the material, so that the bearing capacity of the structure is strengthened.
2: filtration, When the water flows from the fine soil layer into the coarse soil layer, the polyester staple fiber needled geotextile with good air permeability and water permeability can make the water flow through and effectively carry the soil particles, fine sand and small stones, so as to maintain the stability of soil and water engineering.
3: drainage, polyester staple fiber needled geotextile has good water conductivity, it can form a drainage channel inside the soil, the excess liquid and gas in the soil structure out.
4: reinforcement, Use polyester staple fiber needled geotextile to enhance the tensile strength and deformation resistance of soil mass, enhance the stability of building structure, and improve the quality of soil mass.
5: protection, When the water scour the soil, the concentrated stress will be effectively diffused, transferred or decomposed, to prevent the soil from being damaged by external force, and to protect the soil.
6: high tensile strength, good permeability, breathable performance, high temperature resistance, freezing resistance, aging resistance, corrosion resistance, no moth.
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Composite membrane in landfill, ash field impervious, river management, artificial lake, reservoir, reservoir and other projects as the main use of impervious, tensile, tear resistance, top breaking and other physical and mechanical performance indicators are high, can meet the water conservancy, municipal, construction, traffic, subway, tunnel and other civil engineering needs. Due to the selection of polymer materials and the addition of anti-aging agents in the production process, it can be used in unconventional temperature environment. As the impervious subject, the impervious coefficient of composite film is very important in the indicators, the impervious coefficient of composite film depends on the impervious performance of HDPE geomemofilm, at present, the impervious application of HDPE geomemofilm, mainly polyvinyl chloride (PVC) and polyethylene (PE), EVA (ethylene/vinyl acetate copolymer), Composite film is polyethylene (PE) geomembrane, it is a kind of polymer chemical flexible material, small specific gravity, strong extensibility, high deformation ability, corrosion resistance, low temperature resistance, frost resistance, good anti-seepage effect of environmental protection non-toxic geosynthetic materials.
Composite membrane its main mechanism is to HDPE geomembrane impervious partition earth dam leakage channel, with its larger tensile strength and elongation to withstand water pressure and adapt to the dam deformation; Geotextile is also a kind of polymer short fiber chemical material, through acupuncture forming, with high tensile strength and elongation, it combined with HDPE geomembrane, not only increases the tensile strength and puncture resistance of HDPE geomembrane, but also increases the friction coefficient of the contact surface because of the rough geotextile surface, which is conducive to the stability of composite geomembrane and protective layer. At the same time, they have good corrosion resistance to bacteria and chemical action, not afraid of acid, alkali, salt erosion, in the case of light use, long service life.
Keywords:- Composite geomembrane
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