Construction requirements for bentonite waterproof blanket (

2019-11-03 18:40 Source:未知 Writer: Steven
1. The bentonite waterproof blanket (GCL) should be inspected for the base layer before construction. The base layer should be compact and flat, without pits and water, without stone roots and other sharp objects.
 
2, bentonite waterproof blanket (GCL) in the handling and construction process should try to avoid vibration and impact, to avoid the shell has a large degree of curvature, preferably in one place.
 
3. After GCL installation and acceptance, it is necessary to carry out backfilling work as soon as possible. If it is used in conjunction with HDPE geomembrane, the geomembrane should be paved and welded in time to prevent it from getting wet or broken.
 
The waterproof mechanism is: the sodium-based particle bentonite selected for the bentonite waterproof blanket can expand more than 24 times in water, so that it forms a uniform colloidal system with high viscosity and low fluid loss. Under the restriction of two layers of geotextile, the bentonite is made. From disorder to ordered expansion, the result of continuous water swelling is to make the bentonite layer itself dense and thus waterproof.





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