The mineralogical name of bentonite is montmorillonite. Natural bentonite can be mainly divided into two categories: sodium-based and calcium-based, according to its chemical composition. Bentonite has the characteristic of swelling when it meets water. When calcium-based bentonite swells, its volume only increases to about three times of its original size. However, sodium-based bentonite can adsorb water five times of its own weight when it meets water, and its volume expands to more than 15-17 times of its original size. Locking sodium-based bentonite between two layers of geosynthetic materials plays a protective and reinforcing role, giving GCL certain overall shear strength.
Density: Sodium-based bentonite forms a high-density diaphragm under water pressure conditions. When its thickness is about 3mm, its permeability is below &10ˉ11m/sec, equivalent to 100 times the density of 30cm thick clay, with very strong self-water retention performance.
Permanent waterproofing performance: Since sodium-based bentonite is a natural inorganic material, even after a long time or changes in the surrounding environment, it will not age or corrode, thus ensuring its long-lasting waterproofing performance.
Simple construction, short duration: Compared with other waterproofing materials, construction is relatively simpler, without the need for heating or bonding. Only bentonite powder, nails, and washers are needed for connection and fixation. No special inspection is required after construction, and any discovered waterproofing defects are easy to repair. GCL is the waterproof material with the shortest construction period among existing materials.
Not affected by temperature: It does not become brittle even in cold weather conditions.
Integration: Integration of waterproofing material and object: When sodium-based bentonite meets water, it has an expansion capacity of 20-28 times. Even if concrete structures experience vibration and settlement, the bentonite within the GCL can repair cracks on the concrete surface up to 2mm wide. Plastic drainage board.
Environmentally friendly: Bentonite is a natural inorganic material, harmless and non-toxic to humans, and has no significant impact on the environment, offering good environmental protection performance.
Product features: High cost-performance ratio, extremely versatile use. Product width can reach up to 6 meters, greatly improving construction efficiency.
Scope of application and application conditions: Suitable for municipal (landfill), water conservancy, environmental protection, artificial lake, and underground waterproofing and seepage prevention projects in buildings. Traditional waterproofing materials cannot be used under negative temperatures (-20℃), but this material can still be used; it can also be applied on damp substrates (without standing water); construction cannot be carried out in rainy or snowy weather; unsuitable for strong acid or strong alkali solution seepage prevention; due to bentonite being an inorganic material, its durability is better than organic waterproofing materials.
Laiwu Haisheng Geosynthetics Co., Ltd. is a comprehensive enterprise integrating engineering building materials development, production, and after-sales service. The company integrates the advantages of similar products and produces various specifications of drainage boards, water storage and drainage boards, geotextiles, composite geomembranes, geogrids... Sales hotline: 13455495879 by: http://www.liuzhenhai.com/