Bentonite Its scientific name is montmorillonite, and its chemical composition is sodium based and calcium based. In terms of characteristics, it has the characteristics of chemical reaction and expansion when encountering water. Generally speaking, when it expands, the volume of calcium base bentonite is only three However, sodium bentonite can absorb five times of its own weight of water, and its expanded volume can also reach fifteen to seventeen times of the original, with excellent water absorption effect. Therefore, sodium bentonite is often locked in the middle of geosynthetics for protection and fixation.
Product Introduction
Bentonite waterproof blanket is a special door It is a geosynthetic material developed for impermeability of artificial lake waterscape, landfill, roof garden, pool, oil depot and underground garage. It is filled with sodium based expansive soil with high expansibility Geotextile Among non-woven fabrics, the bentonite anti-seepage pad developed by needle punching method can form a lot of fiber spaces. When encountering water, it will form a high-density colloidal waterproof layer with uniform size inside, so as to prevent water penetration.
Material characteristics
Sodium bentonite can form a high-density diaphragm under water pressure. Its thickness is about 3mm, and its water permeability is equivalent to 100 times clay Therefore, it has good self water retaining performance. It has long-term waterproof characteristics.
Its material is natural inorganic material, so it will not produce aging or corrosion, which makes its waterproof performance better.
with other Compared with the waterproof material, this composite material is simpler in construction and does not need to be heated. Therefore, it only needs to be connected and fixed with bentonite powder, nails and gaskets. Therefore, if there are waterproof defects, it is also very easy to use this material for maintenance.
In addition, its use is not affected by the temperature, so it will not break easily in cold conditions.
Moreover, it is a natural inorganic material, so it is not too toxic to the human body or the environment, and is relatively green and environmentally friendly.
Construction method
one Because of its large dead weight, machinery should be used to cooperate with each other in the process of handling and laying, lifting and handling.
two In connection with each other, proposal The method of lapping is adopted.
three When paving on a slope with a gradient of more than 10 degrees, the number of overlapping joints should be reduced as much as possible. The expansive soil cushion must exceed the slope toe line 1500mm above.
four No engineering equipment can be driven on the paved synthetic materials to avoid damage. In addition, attention should be paid to the weather temperature during installation. If the outdoor temperature is higher than 40 degrees or lower than zero degrees, it is not suitable for installation.
five In addition, the edge of exposed bentonite must be compacted with sandbags or other weights, mainly to prevent the bentonite waterproof blanket from being damaged by wind or being pulled out of the anchor hook by other objects.
six In the process of laying, attention must be paid to avoiding wrinkles. If wrinkles appear, they should be immediately re laid or cut and repaired to eliminate wrinkles.
seven During construction, dragging should be avoided to reduce contact with the ground and wear.
