Bentonite waterproof blanket Shigongfangfa
Number of hits：2072019-12-10 00:00:00
新闻摘要:The bulging waterproof blanket is a kind of geotechnical synthetic material that is specially used to prevent leakage such as artificial lake water scenes, garbage landfills, underground garages, roof gardens, pools, oil depots, and chemical dumps. It is
GCL is a kind of anti-seepage liner between GCL(field thick compacted clay impermeable liner) and polymer material-geotechnical membrane.
It is mainly used in landfills, underground reservoirs, underground infrastructure construction and other projects in environmental engineering to solve the problems of sealing, isolating, and preventing leakage, and has a good effect and strong resistance to destruction.
According to the production process, bentonite waterproof blanket can be divided into: sodium bentonite waterproof blanket by needling method, sodium bentonite waterproof blanket by acupuncture coating method, and sodium bentonite waterproof blanket by adhesive method.
Acupuncture film coating method sodium bentonite waterproof blanket is a layer of high-density polyethylene geotechnical film on the outer surface of non-woven geotechnical cloth acupuncture sodium bentonite waterproof blanket.
Adhesive natriure-based bentonite waterproof blanket is a nature-based bentonite that is used to glue bentonite particles to high-density polyethylene plates and compresses to produce a nature-based bentonite.
Shigongfangfa of the bentonite waterproof blanket
1, bentonite waterproof blanket material self-weight is large, it is appropriate to use a shovel machine with waterproof blanket lifting tool handling, laying.
2, bentonite waterproof blanket materials are connected by a joint.
3, bentonite waterproof blanket in more than 10 % of the slope should be as much as possible to reduce the length of the slope along the number of connections, the slope of bentonite pad must exceed the slope foot line more than 1500 mm. We will lay the bentonite waterproof blanket in strict accordance with the design drawings submitted to the engineer, except as required by the owner or supervisor.
Any equipment used to lay bentonite waterproof blankets shall not be driven on top of the geotechnical composite materials already laid. When installing bentonite waterproof blanket, outdoor air temperature can not be lower than 0 °C or higher than 40 °C.
All exposed bentonite waterproof blankets must be immediately compacted with sandbags or other heavy weights to prevent bentonite waterproof blankets from being blown by the wind or pulled out of the surrounding Anchorage ditch. The bentonite waterproof blanket can not be carried out in windy weather to prevent wind blowing.
6, bentonite waterproof blanket laying method must ensure bentonite waterproof blanket and the foundation below direct contact to eliminate folds. Any fold, fold or arch may cause the same thing to happen to other geotechnical materials in the soil layer, in order to avoid folding, folding, and arch. We will eliminate these problems by re-laying or cutting and repairing bentonite waterproof blankets as required by the technical instructions.
The equipment of the bentonite waterproof blanket must be approved by the engineer before it can be used. It is not allowed to use unprotected razors or "quick knives." Construction equipment that may damage the bentonite blanket can not act directly on the bentonite blanket. The feasible method of laying is to push the soil back and spread the bentonite blanket at the front of the bulldozer. If the excavator leaves a mark on the ground, it shall return to its original condition before the laying continues.
8, laying bentonite blanket to minimize the bentonite blanket on the foundation, so as not to cause damage to the bentonite blanket and ground contact surface. If necessary, a temporary layer of geotextile can be placed on the ground to reduce the damage caused by friction during the laying of the bentonite blanket.
Sodium bentonite forms a dense diaphragm under water pressure. When the thickness is about 3mm, its permeability is & amp; × 10-below 11m/sec, equivalent to 100 times the density of 30cm thick clay, with strong self-preservation water performance.
Because natriure-based bentonite is a natural inorganic material, even after a long period of time or changes in the surrounding environment, there will be no aging or corrosion, so the waterproof performance is long-lasting.
Simple construction and short duration
Compared with other waterproof materials, the construction is relatively simple and does not need to be heated and pasted. Simply connect and fix with bentonite powder and nails, washers, etc.. There is no need for special inspection after construction, and it is easy to repair if a waterproofing defect is found. GCL is the shortest construction period in existing waterproof materials.
Not affected by temperature
They don't break in cold weather.
Integration of waterproof materials and objects
When sodium bentonite encounters water, it has a capacity of 20-28 times. Even if concrete structures vibrate and settle, bentonite in GCL can repair cracks on concrete surfaces within 2mm.
The bentonite composite waterproof blanket(GCL) is a new type of geotechnical synthetic material. It is a composite impermeable material made of a layer of clay or other low-permeability mineral material outer membrane geotechnical fabric or geotechnical membrane by acupuncture or suture. The company uses a highly expansive natriure-based bentonite, which is characterized by expansion in contact with water, resulting in hydration, forming an impervious gel body, and at the same time such bentonite also has the ability to store water. Its absorption and water content can reach more than 10 times its own weight.