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Sodium Bentonite Waterproof Blanket (GCL)

Sodium-based bentonite has high expansibility (bentonite particles can expand 10-30 times of their own volume after absorbing water). When the bentonite waterproof blanket meets water, the sodium-based bentonite absorbs water and expands. Under the action of certain squeezing force (building floor, protective layer and fiber tension inside the waterproof blanket, etc.), molecules are interspersed and arranged, the internal gaps are reduced, forming a dense gel structure, which cannot be penetrated by water molecules, its permeability coefficient can reach 10-9 cm/s.

Category:

Special Series

key word:

Sodium Bentonite Waterproof Blanket (GCL)

Hotline:

+86-514-83299888

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Description

Product Details

waterproof mechanism

Main characteristics

◎ Excellent waterproof and anti-seepage performance: the anti-static water pressure can reach more than 0.4MPa, and the permeability coefficient is less than 5 × 10-⁹cm/s;

◎ Simple construction: the width of the product is nearly 6 meters, the length can reach 40 meters, the basic requirements are low, the construction only needs to be overlapped according to the requirements, the construction speed is fast, the construction period is short;

◎ not affected by the construction environment temperature:-32 ℃ below can also be construction.

◎ easy to repair: such as the waterproof layer of accidental damage, easy to repair and reinforcement;

◎ Good self-healing: even after puncture, it can heal itself when water expands.

◎ Durable environmental protection: natural inorganic materials, no aging, non-toxic environmental protection, good durability;

Common Specifications

Width: 6.0m; Length: 30m; Weight: 4500g/m2.

Note: The company can produce other specifications and sizes and different technical indicators of bentonite waterproof blanket according to the requirements of the buyer.

Scope of application

Bentonite waterproof blanket (GCL) can be used for municipal, highway, railway, water conservancy, environmental protection and industrial and civil buildings in the underground waterproof and anti-seepage construction, construction can be based on the needs of the project alone use of bentonite waterproof blanket (GCL), can also be used with other geotechnical materials or waterproof materials.

◎ Municipal transportation: waterproof and anti-seepage of subway construction; waterproof (seepage) of highway subgrade and slope, U-shaped groove and bridge foundation; it can be used to improve road performance, prevent mud-turning, and improve the bearing capacity and service life of pavement and subgrade.

Environmental protection engineering: it has good anti-seepage effect in the construction of landfill plant and sewage treatment plant, which can improve the strength of dam, reduce and avoid soil erosion.

◎ In industrial and civil buildings in the underground waterproof engineering application, can improve the reliability and durability of waterproof, speed up the construction progress, reduce the construction cost.

◎ Others: such as aquaculture farms, artificial lakes, tunnels, caverns, mines and other kinds of construction that need waterproof and anti-seepage.

Construction method

On a flat and solid base, according to the waterproof design requirements, bentonite waterproof blanket (GCL) is lapped and laid. When laying, the non-woven fabric should meet the water surface, and the joints are sealed with bentonite sealing powder (or paste). The construction of the protective layer must be completed before the laying of the waterproof blanket is not wet by water.

Main technical indicators of products

Executive standard:(JG/T193--2006)

Serial Number	Project		Technical indicators
Serial Number	Project		GCL-NP	GCL-OF	GCL-AH
1	Mass per unit area of bentonite waterproof blanket, g/m²		≥ 4000 and not less than the specified value	≥ 4000 and not less than the specified value	≥ 4000 and not less than the specified value
2	Swelling index of bentonite, mL/2g		≥ 24	≥ 24	≥ 24
3	Blue absorption, g/100g		≥ 30	≥ 30	≥ 30
4	Tensile strength, N/100mm		≥ 600	≥ 700	≥ 600
5	Elongation under maximum load,%		≥ 10	≥ 10	≥ 8
6	Peel strength, N/100mm	Nonwovens and Woven Cloth	≥ 40	≥ 40	---------
6	Peel strength, N/100mm	PE Film and Nonwovens	---------	≥ 30	---------
7	Permeability coefficient, m/s		≤ 5.0 × 10¹¹	≤ 5.0 × 10¹²	≤ 5.0 × 10¹²
8	Hydrostatic pressure resistance		0.4MPa,1h, no leakage	0.6MPa,1h, no leakage	0.6MPa,1h, no leakage
9	Filtration loss, mL		≤ 18	≤ 18	≤ 18
10	Bentonite Durability, mL/2g		≥ 20	≥ 20	≥ 20