Functions: penetrative protection, isolation
Application:
Earthwork dam, rock-fill dam, masonry dam and concrete dam; horizontal impervious blanket of embankment and dam front, vertical impervious barrier of foundation; tailing dam, dam body and reservoir region of sewage reservoir; construction cofferdam; canal, liquid bath (pit, coffin pit); waste storage; seepage control lining for subway, basement and tunnel; roadbed of speedway and railway; salting prevention of roadbed and other foundation; waterproofer of swelling soil and collapsible loess; roofing leak resistance
Products: Two-side seepage control membrane and one preventive geotextile; one-side seepage control membrane and preventive geotextile.
Width: 4-6m
Specification: membrane thickness 0.2mm-0.8mm; protective geotextile 100g/m2-800g/m2 (produced by our factory, conforming to the related national standard).
Table1 Basic Technological Requirement：
|
Serial number
|
Items
|
Indices
|
Allowance, %
|
|
|
1
|
Mass-area ratio, g/m2
|
According to design or contractual specifications
|
-10
|
|
|
2
|
Width, cm
|
According to design or contractual specifications
|
-1.0
|
|
|
3
|
Breaking strength 1)，KN/m
|
According to design or contractual specifications
|
-5
|
Vertically and horizontally
|
|
4
|
Tearing extensibility %
|
Adherence to specification
|
30～100
|
Vertically and horizontally
|
|
5
|
Ripping strength 1), KN
|
According to design or contractual specifications
|
-8
|
Vertically and horizontally
|
|
6
|
CBR bursting strength, KN
|
According to design or contractual specifications
|
-5
|
|
|
7
|
Stripping strength 2), N/cm
|
6
|
Not below the standard
|
Vertically and horizontally
|
|
8
|
Resistance to hydrostatic pressure, Mpa
|
According to design or contractual specifications
|
Not below the standard
|
|
|
9
|
Permeability coefficient, cm/s
|
According to design or contractual specifications
|
Adherence to specification
|
|
1) For the strength requirements of common short-fiber needling nonwovens/polyethylene composite geomembrane, see Table 2
2) If the sample is tested hard to predict its stripping and not beyond the high strength base material and membrane material, it will be regarded as qualified one.
Table 2 Strength Standard for Short-fiber Needling Nonwovens/Polyethylene Composite Geomembrane：
|
Mass-area ratio
|
400
|
500
|
600
|
700
|
800
|
900
|
1000
|
Remark
|
|
Strength requirement\membrane thickness, mm
|
0.25～0.345
|
0.3～0.5
|
|
Breaking strength, KN/m 5
|
7.5
|
10.0
|
12.0
|
14.0
|
16.0
|
18.0 Vertically and horizontally
|
|
CBR bursting strength, KN 1.1
|
1.5
|
1.Strength requirement\membrane thickness, mm 9
|
2.2
|
2.5
|
2.8
|
3.0
|
|
CBR bursting strength ，KN 1.1
|
1.5
|
1.9CBR bursting strength, KN 1.1
|
2.2
|
2.5
|
2.8
|
3.0
|
|
Note: When the practical specification is between the neighboring specifications in the table, the related check indicators will be calculated according to the interpolation method; if the product specifications is beyond the table given scope or it is with other process or construction, the check indicators carry out the design or negotiated by the supplier and demander.
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