Product Introduction:

　　The top layer of GCL coated bentonite waterproof blanket is high-density polyethylene (HDPE) film, and the lower layer is non-woven fabric. The bottom layer of anti-seepage sodium based bentonite is woven fabric. Fix sodium based bentonite with waterproof effect between high-strength geotextiles using needle punching method, and then stick a layer of high-density polyethylene (HDPE) film on the nonwoven fabric. This product has stronger waterproof and anti-seepage capabilities than ordinary sodium based bentonite waterproof blankets. Suitable for waterproofing and leakage prevention treatment in water landscape engineering with high requirements, such as tunnels, subways, basements, and underground passages, where groundwater resources are abundant in various underground buildings.

　　Performance characteristics:

　　1. Compactness: Sodium based bentonite forms a high-density diaphragm under water pressure, with a thickness of about 3mm. Its water permeability is& × ten ˉ Below 11m/sec, equivalent to 100 times the density of 30cm thick clay, it has strong self water retention performance.

　　2. Waterproof performance: Because sodium based bentonite is an inorganic material, even after a long time or changes in the surrounding environment, it will not age or corrode, resulting in long-lasting waterproof performance.

　　3. Not affected by temperature: It will not brittle even in cold weather conditions.

　　4. Integration of waterproof materials and objects: When sodium based bentonite encounters water, it has a swelling capacity of 20-28 times. Even if the concrete structure undergoes vibration and settlement, the bentonite in GCL can repair cracks on the concrete surface within 2mm.

　　5. Bentonite is an inorganic material that is harmless to the human body and has no special impact on the environment. It has good performance. Suitable for municipal, household waste landfill, water conservancy, and artificial lake building underground waterproofing and anti-seepage engineering. Not suitable for strong acid or alkaline solution anti-seepage.

　　Purpose:

　　GCL bentonite waterproof blanket is mainly used in environmental engineering projects such as waste landfills, underground reservoirs, and underground infrastructure construction. It solves the problems of sealing, isolation, and leakage prevention, with good effects and strong resistance to damage. The principle is that the mineralogical name of bentonite is montmorillonite, and bentonite is mainly divided into two categories based on its chemical composition: sodium based and calcium based. Bentonite has the characteristic of swelling when encountering water. Generally, when calcium based bentonite expands, its expansion is only about 3 times its own volume, while sodium based bentonite adsorbs five times its own weight of water when encountering water, and its volume expands to more than 15-17 times its original value. The sodium based bentonite is locked between two layers of geosynthetic materials to protect and reinforce, giving GCL a certain overall shear strength.

　　Product specifications:

　　Unit area mass ≥ 4000g/㎡, width 4m-6m.

　　Technical indicators of GCL coated bentonite waterproof blanket:

　　Expansion coefficient of bentonite (ml/2g) ≥ 24;

　　GCL unit area mass (g/m2) ≥ 4000;

　　GCL longitudinal fracture strength (KN/m) ≥ 6;

　　GCL transverse fracture strength (KN/m) ≥ 6;

　　GCL longitudinal fracture elongation (%) ≥ 10;

　　GCL transverse fracture elongation (%) ≥ 10;

　　GCL vertical permeability coefficient (cm/s) ≤ 5 × 10-11;

　　The peel strength of geotextile and woven fabric (N/100mm) ≥ 40;

　　The peel strength of HDPE film and geotextile (N/100mm) ≥ 35;

　　GCL static water pressure test at 0.6MPa for 1 hour, no leakage.