Composite Geomembrane The Ideal Material for Anti-Seepage in
Environmental Protection and Water Conservancy Projects
Product Introduction
Composite geomembrane is a composite material that combines
geotextile and plastic film. It is widely used in many fields,
especially in projects that require efficient anti-seepage. The
following is a detailed introduction to composite geomembrane:
Definition and structure of composite geomembrane
Composite geomembrane is a composite structure formed by attaching
geotextile on one or both sides of a plastic film. It has various
forms, including one cloth and one membrane, two cloths and one
membrane, etc. Geotextile serves as a protective layer to
effectively protect the anti-seepage layer from damage, while
reducing ultraviolet radiation and increasing anti-aging
performance2.
Main types
One cloth and one membrane: suitable for occasions that require
additional protection.
Two cloths and one membrane: provide double protection and enhance
the overall structural strength.
Application fields of composite geomembrane
Composite geomembrane has a wide range of applications in many
fields due to its excellent anti-seepage performance:
Environmental protection
Used in environmental protection fields such as wastewater
treatment, sewage treatment, landfills and hazardous waste
landfills, effectively preventing leakage and pollution.
Water conservancy projects
Applicable to water conservancy projects such as dams, reservoirs,
tunnels, bridges, and seawalls, which can effectively prevent
leakage and pollution.
Agricultural planting
Can be used in agricultural construction such as orchard drainage,
channel covering, anti-film covering, and pond dam covering, with
good anti-seepage effect.
Road construction
Used in road construction fields such as tunnels, roadbeds,
bridges, and culverts, providing a reliable solution for road
waterproofing.
Construction methods and precautions
Construction methods
The use must be buried, and the covering thickness should not be
less than 30cm. -The renovation anti-seepage system should consist
of a cushion layer, an anti-seepage layer, a transition layer, and
a protective layer.
The soil should be solid to avoid uneven subsidence and cracks.
When laying, do not pull the geomembrane too tight, and it is
better to have the two ends buried in the soil in a corrugated
shape.
Precautions
During construction, stones and heavy objects should be avoided
from hitting the anti-seepage composite geomembrane directly.
It is best to lay the membrane and cover the protective layer while
constructing.
Material selection and characteristics
The materials of composite geomembranes include any possible
material combination, such as ceramic membranes on metal oxides or
aromatic polyamide films on polysulfone microporous membranes. The
flat membranes or roll membranes must be reinforced with nonwovens
to support the microstructure.
Main characteristics
High strength
Good elongation performance
Acid and alkali resistance, corrosion resistance
Aging resistance
Good anti-seepage performance
Market supply
There are many companies specializing in the production and sale of
composite geomembranes in the market, such as Shandong Hengyang New
Materials Co., Ltd. and Shandong Lingxiang New Materials Co., Ltd.
These companies provide products of various specifications and
models to meet the needs of different customers.
In summary, composite geomembranes, as an important geosynthetics,
play an important role in many fields. Understanding its
definition, structure, application field, construction method and
material characteristics will help to better select and use this
material and ensure the quality and effect of the project.
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 | |
