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).
Table: Basic Technological Requirement:
SI
No.
|
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
|
CBR bursting strength, KN
|
According to design or contractual
specifications
|
-5
|
|
4
|
Breaking strength 1),KN/m
|
According to design or contractual
specifications
|
-5
|
Vertically and horizontally
|
5
|
Tearing extensibility %
|
Adherence to specification
|
30~100
|
Vertically and horizontally
|
6
|
Ripping strength *, KN
|
According to design or contractual
specifications
|
-8
|
Vertically and horizontally
|
7
|
Stripping strength **, 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
|
* For the strength requirements of common short-fiber needling nonwovens/polyethylene composite geomembrane, see Table below
**
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: 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.
thank you for providing the tables they were super helpful for helping me understand what was going on. Great post keep up the good work.
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