What is the bentonite waterproof blanket made of:
Let me first talk about what is bentonite. Bentonite is called montmorillonite. According to its chemical structure, it is divided into calcium-based and sodium-based. The characteristic of bentonite is that it swells with water. When calcium-based bentonite swells with water, it can reach its own volume. Sodium bentonite can absorb five times its own weight when it swells with water, and its volume expansion reaches more than 20-28 times its own volume. Because the expansion coefficient of sodium bentonite waterproof blanket is higher, it is now used more often. . The sodium bentonite is locked in the middle of two layers of geosynthetics (the bottom is woven geotextile, and the upper is short-filament geotextile), which plays a role of protection and reinforcement. The blanket material made by non-woven needle punching makes GCL has a certain overall shear strength.
Advantages of bentonite waterproof blanket:
1: Compactness: After sodium bentonite swells in water, it will form a high-density membrane under water pressure, which is equivalent to 100 times the compactness of 30cm thick clay, and has strong water retention properties.
2: Waterproof: Since bentonite is taken from nature and used in nature, it will not be aging or corroded after a long time or the surrounding environment changes, so the waterproof performance is long-lasting. But it cannot be used in high-concentration electrolyte solution waterproofing and anti-seepage projects.
3: Integrity: the integration of the bentonite waterproof blanket and the bottom environment. After the sodium bentonite swells with water, it forms a compact body with the bottom environment, can adapt to uneven settlement, and can repair cracks on the inner surface within 2mm.
4: Green and environmental protection: Since bentonite is taken from nature, it will not affect the environment and humans.
5: Impact on the construction environment: Not affected by strong winds and cold weather. However, due to the swelling property of bentonite in contact with water, construction cannot be performed on rainy days.
6: Simple construction: Compared with other geotechnical materials, the bentonite waterproof blanket is simple to construct and does not require welding. You only need to sprinkle bentonite powder on the overlap and fix it with nails.
The purpose of bentonite waterproof blanket:
Specially used in artificial lakes, waterscapes, landfills, underground garages, underground infrastructure construction, roof gardens, pools, oil depots, chemical storage yards and other projects to solve sealing, isolation, and anti-leakage problems, and strong resistance to destruction , The effect is excellent.
Post time: Oct-29-2021