FIELD: construction.
SUBSTANCE: impervious composite sheet comprises of bentonite powder or granules sandwiched between the two layers of geotextile, woven and nonwoven, interconnected by needling. Liquid composition is applied to the woven and nonwoven geotextiles and based on polyethylene with the composition layer thickness of 0.2-0.4 mm. To eliminate surfacing under water the coating is made of a layer of fine sand with a fineness modulus of 1.5 micron and with a≤layer thickness of 3-5 mm which is separated from the bentonite by a non-woven geotextile sheet.
EFFECT: waterproofing of the composite sheet and potential placement in the existing irrigation canals and reservoirs without their stopping and emptying.
1 dwg
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