The GCL's main component is bentonite powders and granules, and it has a high expansion and the high water absorbing capacity, permeable low when wet; bentonite outside wrapped in geosynthetic material is generally a non-woven geotextile, there are used woven geotextile or geotextile The film, primarily to protect and reinforce the role of the GCL overall strength. Bentonite blanket (Geosynthetic Clay Liner), referred to the GCL is a new geosynthetics is sandwiched between two layers of geosynthetic material seal bentonite powder (or other low permeability material), acupuncture, adhesive or suture into a composite material mainly used for sealing or a barrier. Bentonite composite waterproof blanket (mat), width up to 6M, length 60M (can be produced according to customer requirements) product penetration coefficient 1.25-3.54 × 10 -9 cm / s CBR bursting strength 1.2KN punctured strength 0.34KN, excellent overall performance. I produced a uniform quality of the GCL, impermeability capability, flexible, can be suitable for the uneven foundation settlement, and prevents the soil material is lost, has a good ability to heal cracks and other defects. Bentonite waterproof blanket features: 1, dense sodium bentonite hydrostatic state to form a high density diaphragm thickness of about 3mm, its water permeability of clay 30cm & × 10 ˉ 11m/sec, the equivalent of 100 times degrees, has a strong self-protection water performance. 2 with permanent waterproof because sodium bentonite natural inorganic material, even after a long time or the surrounding environment changes, aging or corrosion phenomenon does not occur, lasting waterproof performance. , Easy construction duration is short and compare other waterproof material, the construction is relatively simple, and does not require heating and paste. Simply connected and fixed with bentonite powder and nails, washers, etc.. Does not require special inspection after construction, and also easy to repair If waterproof defects found. GCL existing waterproofing material in the shortest construction period. 4 from temperature affects not brittle fracture in cold climatic conditions. 5, the integrated waterproof materials and the integration of the object: sodium bentonite water, with expansion capacity of 20-28 times, even if the concrete structures vibrate and settlement of GCL bentonite patch of 2mm of concrete surface crack . 6 green bentonite composite waterproof liner (GCL) under construction, construction methods in the structures of underground waterproofing, bentonite composite waterproof pad before laying preparations (1) do the following materials analysis, draw bentonite composite waterproof pad (GCL) laying order and cropped. (2) check the bentonite compound waterproof liner (GCL), the appearance of quality, records, and repair mechanical damage and trauma, holes and other defects have been found. (3) construction of bentonite composite waterproof liner (GCL), no rain, no snow weather under construction in case of rain, snow and application of plastic film cover to prevent the advance of hydration of the GCL. Backplane parts bentonite composite waterproof pad laying (1) Check the cushion is well require the cushion flat, clean, clean, without stones and other debris, without projections or depressions (its size should not exceed 20mm ). (2) laying waterproof pad, between the pad and the pad seams should be staggered, and should not be formed through the seams. (3) the width of the lap seam waterproof pad greater than 20cm, and in the intermediate portion of the overlapping parts per Yanmi 0.4kg evenly sprinkle bentonite dry powder or (bentonite clay), in the upper lap at bentonite dry powder or ( bentonite clay) sealed the lower lap required per linear meter 0.2kg sprinkled with bentonite dry powder (bentonite clay).