Two-cloth-one-membrane composite membrane used in water conservancy
projects
Product Introduction
Definition of two-cloth-one-film composite membrane
The two-cloth-one-film composite membrane is a geosynthetic
material composed of two layers of non-woven fabric and one layer
of high-density polyethylene (HDPE) film. This material combines
the anti-seepage effect of geomembrane and the isolation,
protection and drainage functions of geotextile, and is widely used
in many fields.
Application fields
Water conservancy projects: such as anti-seepage treatment of
reservoirs, canals, river embankments, lake dams, etc.
Industrial applications: anti-seepage of sugar factories, chemical
plants, fertilizer plants, sewage treatment pools, etc.
Infrastructure construction: anti-seepage lining of tunnels,
anti-seepage treatment of central green belts of highways, etc.
Structural characteristics and performance parameters of
two-cloth-one-film composite membrane
Structural characteristics
The two-cloth-one-film composite membrane forms an effective
waterproof barrier by sandwiching two layers of non-woven fabric
between the HDPE film in the middle. This structural design not
only improves the overall strength of the material, but also
enhances its tensile and tear resistance.
Performance parameters
Unit area mass: According to different needs, the unit area mass
range can range from 400g/m² to 1000g/m².
Membrane material thickness: The membrane thickness is generally
between 0.1-1.5mm, and can be selected according to project
requirements.
Physical and mechanical properties: including breaking strength,
longitudinal and transverse CBR bursting strength, tearing
strength, etc. These indicators ensure the durability and
reliability of the material in actual use.
Construction methods and precautions
Construction methods
Surface preparation: Use sand or clay with a smaller diameter to
level the surface.
Laying process: Do not stretch too tight during laying, and the
parts buried in the soil at both ends are corrugated.
Protective layer setting: Use fine sand or clay to lay a 10cm
transition layer on the laid two cloths and one membrane, and then
lay 20~30cm blocks (or prefabricated concrete blocks) as an
anti-impact protective layer.
Precautions
Joint treatment: Construction joint treatment is a key process,
generally using overlap or hot welding to avoid leakage.
Material protection: During construction, stones should be avoided
from hitting the material directly as much as possible. It is best
to construct the protective layer while laying the membrane.
Advantages and application prospects of two-cloth-one-membrane
composite membrane
Advantages
High durability: Due to the selection of polymer materials and the
addition of anti-aging agents, the two-cloth-one-membrane composite
membrane can be used in unconventional temperature environments.
Versatility: In addition to anti-seepage isolation, it also has the
ability to filter drainage and reinforce protection.
Application prospects
With the improvement of infrastructure construction and
environmental protection awareness, the demand for
two-cloth-one-membrane composite membrane in water conservancy
projects, industrial applications and infrastructure construction
will continue to grow. Its excellent performance and wide
application fields make it an important direction for the
development of geosynthetics in the future.
In summary, as an important geosynthetics, the
two-cloth-one-membrane composite membrane plays an important role
in many fields with its excellent performance and wide application
fields.
Product Specification
Product Specification and Technical Index (GB/T 17642-2008)
| Item | Specifications | Remark |
| Geotextile Unit Weight (g/㎡) | 300 | 500 | 600 | 700 | 800 | 900 | 1000 | 1100 | |
| Geomembrane Thickness (mm) | 0.25-0.35 | 0.30-0.50 | |
| Nominal Fracture Strength (KN/m) | 2.50 | 7.50 | 10 | 12 | 14 | 16 | 18 | 20 | |
| Breaking Strength (KN/m,≥,LD/TD) | 2.50 | 7.50 | 10 | 12 | 14 | 16 | 18 | 20 | |
| Standard Intensity Corresponding Elongation Rate (%) | 30~100 | |
| CBR Burst Strength (KN,≥) | 0.70 | 1.50 | 1.90 | 2.20 | 2.50 | 2.80 | 3.00 | 3.20 | |
| Longitudinal Tear Strength (KN,≥) | 0.05 | 0.25 | 0.32 | 0.40 | 0.48 | 0.56 | 0.62 | 0.70 | |
| Hydrostatic Pressve (Mpa) | See List Below | |
| Peel Strength (N/cm,≥) | 6 | |
| Vertical Permeability Coefficient (cm/s) | According to design or contract mentioned. | |
| Width Variation (%) | -1.00 | |
|
Specification
Item | Geomembrane Thickness (mm) | Remark |
| 0.20 | 0.30 | 0.40 | 0.50 | 0.60 | 0.70 | 0.80 | 1.00 |
| Hydrostatic Pressve (Mpa) | One geotextiles with one geomembrane | 0.40 | 0.50 | 0.60 | 0.80 | 1.00 | 1.20 | 1.40 | 1.60 | |
| Two geotextiles with one geomembrane | 0.50 | 0.60 | 0.80 | 1.00 | 1.20 | 1.40 | 1.60 | 1.80 | |
