For a seepage-proof structure of a hazardous waste landfill, no doubt the geomembrane is the key. As a mainstream and effective anti-seepage material, the quality of geomembrane will determine the quality of a hazardous waste landfill. Due to the constraints of domestic geomembrane on equipment, production management, raw materials and other factors, and the use of recycled materials by some black-hearted manufacturers to produce geomembrane, the quality of geomembrane far exceeds the requirements of international standards. Most of the hazardous waste landfills use imported geomembrane materials as the first choice. Let's introduce the features of HDPE geomembrane to Laiwu Gold Industry.
First, the friction coefficient is large-the rough particles on the surface of the HDPE rough geomembrane increase the friction coefficient and increase the stability of the slope. For example, the rough surface geomembrane produced by Soma Canada can even reach 0.75mm, which is three times the international standard, which greatly enhances the stability of the landfill.
Second, the high permeability coefficient-HDPE geomembrane has an incomparable effect of ordinary waterproof materials, water vapor permeability coefficient K <= 1.0 * 10-13g.cm / ccm2.s.pa.
3. Chemical stability-HDPE geomembrane has excellent chemical stability and is widely used in sewage treatment, chemical reaction tanks, and landfill sites. Resistance to high and low temperature, resistance to asphalt, oil and tar, acid, alkali, salt and other more than 80 strong acid and alkali chemical media corrosion.
Fourth, anti-aging performance-HDPE geomembrane has anti-aging, anti-ultraviolet, anti-decomposition ability, can be used naked, providing a good material guarantee for environmental impermeability. Both Canadian Soma and the International Geosynthetics Association have done research on the life of geomembrane. The HDPE geomembrane produced by Soma can have a theoretical life of more than 200 years in normal applications and its OIT oxidation induction index can 160 hours, 60% higher aging performance than the international standard 100 hours, which is equivalent to indirectly increasing the life expectancy of 60%, which provides a good guarantee for the long-term protection of the earth from pollution.
V. Resistant to plant roots-HDPE geomembrane has excellent puncture resistance and can resist most plant roots.