The laying of natural water swelling bentonite waterproof blanket shall be parallel to the slope inclination direction. If the slope is greater than 4:1, there shall be no transverse overlap within 1m from the slope top or bottom. Bentonite pad shall be laid flat on the ground without bending or folding, especially where the edge of the bentonite pad is exposed.
Naki Bentonite waterproof blanket cannot be constructed when there is ponding or rain. The bentonite cushion laid on the same day must be covered with backfill, geomembrane or temporary tarpaulin, and it is forbidden to spend the night without cover. (If hydration occurs, consult the engineer and supervisor for solutions, or withdraw the hydration part)
The connection between GCL bentonite waterproof blanket and GCL nano waterproof blanket: strip method: overlap GCL in the length and width direction, with the overlapping width of 25 cm, (of which the main part is 10 cm, and the edge part is 15 cm), and the joint is free of wrinkles, dirt and other materials. At the distance of 25 cm from the edge, 10 cm is paved manually or mechanically, The strip bentonite powder with a height of 1 cm is not lapped between the two layers of GCL, and the dosage of bentonite powder is 0.4 kg/m.
When lapping, the bentonite pad is completely covered on the ground without gaps to prevent the foundation soil from entering the lapping area.
Generally, "strip method" is used to directly pave and seal relatively flat joints, and bentonite paste is used at slopes and special points. (Bentonite paste: add water in the bentonite powder, with a weight ratio of 1:3, and mix continuously and evenly until a smooth and soft paste is obtained).
GCL connection to pipes and structures:
The "strip method" or "paste method" shall be used for careful sealing. When connecting with the structure, the GCL end on the horizontal plane shall be carefully constructed to ensure the sealing.
When laying GCL on the facade and slope surface, in order to avoid sliding, anchor nails and gaskets can be used to fix it. In addition to fixing the overlapping part and edge of the bentonite pad with steel nails, nails should also be added in the middle of the whole bentonite pad depending on the flatness to ensure that the bentonite pad is firmly installed on the wall and ground. When necessary, the bentonite pad should be plastered on the wall with bentonite paste, The nail hole can be treated as needed,
Damage repair of 5000g natural nano bentonite waterproof blanket:
If the bentonite pad is torn or punctured during construction, a piece of "patch" can be cut from a new roll of bentonite pad to cover the damaged part. The distance between the four sides of the patch to be repaired and the surrounding of the damaged part shall not be less than 30cm. Before the "patch" is paved, some granular bentonite or bentonite slurry shall be spread around the damaged part, Some adhesive may also be used to prevent the "patch" from sticking
