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Describe

1. Product introduction
Compound geomembrane takes polyethylene as anti-seepage body, and performs hot-press synthesis of isolation drainage and high-performance waterproof staple needled geotextile, and is divided into one-cloth and one-membrane,
2. Product property
The product is characterized by high strength, good elongation property, big deformation modulus, corrosion resistance, ageing resistance, good anti-seepage property, weather resistance, etc.
3. Product use
Applied to dam, road building, airport, water drainage, construction, environmental protection, water supply, etc.; having functions of anti-seepage, protection, reinforcing, etc.
4. Product specifications
Range
Table 1: Basic Item Technical Requirement
Thickness
5. Product standard


Table a basic technical indicators
 

No.

Item

Indicators

Tolerance,%

Remarks

1

Mass per unit area,g/㎡

According to design or contract provisions

-10

 

2

Width,cm

According to design or contract provisions

-1.0

 

3

Fracture strength ⒈),KN/m

According to design or contract provisions

  -5

Vertical and horizontal

4

Elongation at rupture,%

30~100

In accordance with design requirement

Vertical and horizontal

5

Fracture strength ⒈),KN

According to design or contract provisions

-8

Vertical and horizontal

6

CBR bursting strength ⒈),KN

According to design or contract provisions

-5

 

7

Peel strength⒉),N/cm

6

No less than standard

Vertical and horizontal

8

Hydrostatic pressure resistance,MPa

In accordance with Table 3

No less than standard

 

9

Osmotic coefficient ,cm/s

According to design or contract provisions

In accordance with design requirement

 

1. Ordinary Staple Needled Non-Wove/Polyethylene Compound Geomembrane Strength Requirement in accordance with Table 2. If the sample is hard to be peeled, or does not reach specified peel strength, or appears fracture of base material or membrane, the product is regarded as qualification


Table 2: Ordinary Staple Needled Non-Woven/Polyethylene Compound Geomembrane Strength Requirement
 


Quality per unit area,g/㎡
Thickness of film/mm
Strength requirements

400

500

600

700

800

900

1000

Remarks

0.25-0.35

0.3-0.5

Fracture strength,KN/m

5

7.5

10.0

12.0

14.0

16.0

18.0

Vertical and horizontal

CBR bursting strength,KN

1.1

1.5

1.9

2.2

2.5

2.8

3.0

 

Tearing strength,KN

0.15

0.25

0.32

0.40

0.48

0.56

0.62

Vertical and horizontal

Notes: Actual specifications are between neighboring specifications in the Table. Its indicators are calculated by interpolation method. The indicators of other products, beyond the specifications range in the table or having other processes, shall be determined according to design or negotiation between both supply and demand sides.


Table 3 Hydrostatic Pressure Resistance Rated Value
 

Thickness of membrane,mm

0.2

0.3

0.4

0.5

0.6

0.7

0.8

Remarks

One-cloth and one-membrane

0.4

0.5

0.6

0.8

1.0

1.2

1.4

 

Two-cloth and one-membrane

0.5

0.6

0.8

1.0

1.2

1.4

1.6

 


Appearance quality assessment
1). Check appearance quality of coil (section) one by one, and assess by coil (section).
2). Appearance defects are divided into slight defect and major defect. The requirements can be seen in Table 4.

Table 4: Assessment of Appearance Defects

 

No.

Name of defect

Slight defect

Major defect

Remarks

1

Layering, fold

Obvious

Serious

 

2

Sundries

 soft nature, burr edge≤5mm

Hard nature, soft nature, burr edge>5mm

 

3

Bad side

At ≤30cm, one per 50cm

>300cm

 

4

Repair points

≤2cm

>2cm, broken hole

By maximum length

5

Others

Assessment refers to similar defects.

 



3) On each coil of compound geomembrane, major defects are not allowed, and slight defects are less than 5 per 200㎡, or appearance quality is unqualified.

6. Construction
(1) Pavement of geomembrane
A. Clear geomembrane pavement surface and keep it flat.
B. Geomembrane shall be paved at certain direction. Don’t pull too tight with certain expansion range.
C. Geomembrane shall reserve non-bonding layer of PE membrane and PET at both ends.
D. After paving geomembrane, place sandbag onto it to fix it, for the purpose of guaranteeing the welding of geomembrane.
(2) Welding of geomembrane:
A. For well-paved geomembrane, edge joint is not allowed to have dirt, moisture, dust, etc.
B. Before welding, adjust welding secondary side PE single membrane to weld with certain width and flat surface.
C. The company dispatches professional to take charge of welding or technical guidance. Welding shall be performed by special welder.
2. Precautions
(1) It uses embedded type. Thickness of coverage is no less than 32cm.
(2) Entire anti-seepage system consists of cushion layer, anti-seepage layer, transition layer and protective layer.
(3). Soil body shall be solid with uneven settlement and cracks. Clear grass roots within the anti-seepage range. Sandy soil or clay, smaller diameter than that of pavement material of membrane contact surface, shall be used in the protective layer.

 

Corresponding parameter set not found, please add it in property template of background
暂未实现,敬请期待
暂未实现,敬请期待
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