Construction method of sodium base bentonite waterproof blanket
Construction method(1) the grass-roots processing requirements must be smooth and soil compaction, which shall not be more than 20mm and the size of root stone and other impurities.
Construction of protective layerWhen using the precast concrete block protection layer, can be evenly on the waterproof pad laid on Pu Sayue 3-5cm thick fine sand or soil (fine sand or soil containing particle size greater than 2cm stones or other debris). Then, the construction of concrete block protection layer can also be made directly with cement mortar on the waterproof pad, and the construction method and requirements are the same as the construction requirements of the protective layer when the membrane is impermeable.
Cutting and laying of waterproof matThe company produced waterproof pad specifications for the width of less than 6 meters, the length is less than 60 meters. When cutting, it can be cut according to construction size and can be laid transversely or vertically. When the waterproof mat is laid, all joints (transverse or longitudinal) shall be lapped only, and the bentonite powder (bentonite, daub) can be sprinkled on the joint according to the quantity of 0.4kg/m2. The seam width is larger than 25cm, once the waterproof pad appears damaged, found defects or damage, should be timely with bentonite powder (bentonite clay) or damaged parts and enlarge the size of GCL bentonite powder above 15cm (bentonite clay) local repair can be covered, edge processing by the overlapping requirements, when the slope is large, special riveting screws to avoid sliding waterproof pad.
Comparison of performance (compared with conventional membrane anti-seepage)(1) bentonite belongs to inorganic material, no pollution to water quality, good durability and long service life.(2) bentonite composite waterproof pad (GCL) is easy to construct and needs no welding or bonding. It only needs lap joint and has strong reliability.(3) good freeze-thaw resistance, no need to take insulation measures. One, three, Qijiuyi. Sanyi, Eryi, Baba Oriental sensitive.(4) it has self-healing property, and it is not afraid of piercing during construction process and using process.(5) the thickness of compacted clay layer can be reduced, so as to shorten the construction period and reduce the cost.
