Geosynthetic clay liner and geomembrane are geosynthetic materials used in a variety of engineering and environmental applications. Although they have some similar anti-seepage properties. But they have obvious differences in composition, performance and application.
BPM Geosynthetics is the leading geosynthetic clay liner and geomembrane manufacturer and supplier with 13+ years of Geosynthetic clay liner and HDPE geomembrane manufacturing experinces. In this article, we will discuss the differences of geosynthetic clay liners vs geomembranes. By comparing the differences between the two, we can make a better choice between a geosynthetic clay liner (GCL) and a geomembrane for your specific project.
1.What is the Geosynthetic Clay Liner?
Geosynthetic clay liner (GCL), also known as clay blanket, bentonite blankets, bentonite mats, prefabricated bentonite clay blankets and clay geosynthetic barriers, are factory-made hydraulic barriers consisting of a layer of bentonite or other composed of a very low permeability material supported by geotextiles and/or geomembranes that are mechanically fastened together by needling, stitching, or chemical adhesives. GCL liner is widely used in landfills to trap internal leakage. Its bentonite, consisting primarily (>70%) of montmorillonite or other expanded clays, is the preferred and most commonly used GCL. A typical GCL structure consists of two layers of geosynthetic material sewn together and surrounded by a layer of natural or processed Sodium bentonite. Typically, woven and/or nonwoven textile geosynthetics are used, however, polyethylene or geomembrane layers or geogrid geotextile materials have also been incorporated into the design or replaced the textile layer for added strength.
BPM geosynthetic clay liners are geosynthetic material specially used to prevent leakage in artificial lakes and waterscapes, landfills, underground garages, rooftop gardens, pools, oil depots and chemical storage yards. It is made of high-expansion Stable sodium bentonite is filled between a special composite geotextile and a non-woven fabric. The bentonite anti-seepage mat made by acupuncture can form many small fiber spaces. However, the bentonite particles cannot flow in one direction and will flow in one direction when exposed to water. A uniform and high-density gel-like waterproof layer is formed inside the pad to effectively prevent water leakage.
1.1 Geosynthetic Clay Liner Features
- High density and strong self-retaining water performance;
- Permanent waterproof performance;
- Easy construction, short construction period, and does not require special inspection after construction. If waterproofing defects are found, it is easy to repair. GCL The waterproof blanket has the shortest construction period among existing waterproof materials;
- It is not affected by temperature and will not break brittle in cold climate conditions;
- Green and environmentally friendly, bentonite is a natural inorganic material, harmless to the human body and non-toxic to the environment. Special impact and good environmental protection.
2.What is A Geomembrane?
A geomembrane is an extremely low-permeability synthetic membrane liner or barrier that can be used with any geotechnical-related material to control fluid (liquid or gas) migration in man-made projects, structures or systems. Geomembranes are made from relatively thin, continuous polymer sheets, but they can also be made by impregnating geotextiles with asphalt, elastomers or polymer sprays, or as multi-layer asphalt geocomposites. Continuous polymer sheet geomembranes are by far the most common.
BPM Geosynthetics geomembrane is a waterproof barrier material produced from high-density polyethylene resin. The full name is “high-density polyethylene film”, which has excellent environmental stress cracking resistance, low temperature resistance, aging resistance, corrosion resistance, a large operating temperature range (-60–+60) and a long service life. It is widely used in domestic waste landfill anti-seepage, solid waste landfill anti-seepage, sewage treatment plant anti-seepage, artificial lake anti-seepage, tailings treatment and other anti-seepage projects.