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Composite geomembrane for road engineering

In road construction, composite geomembranes are primarily used for subgrade reinforcement and drainage treatment. They enhance the road’s load-bearing capacity, reduce foundation settlement, prevent water penetration and soil erosion, effectively protecting the stability of the road base. Additionally, composite geomembranes can inhibit weed growth and reduce road maintenance workload.

Description

In road construction, composite geomembranes are primarily used for subgrade reinforcement and drainage treatment. Road engineering geomembrane could enhance the road's load-bearing capacity, reduce foundation settlement, prevent water penetration and soil erosion, effectively protecting the stability of the road base. Additionally, composite geomembranes can inhibit weed growth and reduce road maintenance workload.

Basic Parameter

Parameter Specification
Material   Composition HDPE Geomembrane +   Needle-punched Geotextile
Membrane   Thickness 0.2mm – 2.0mm
Fabric   Weight 100g – 600g/m²
Composite   Layers One textile + one membrane / Two   textiles + one membrane / Multilayer
Width Standard 6 meters, customizable   1m–8m
Length 50m or 100m per roll,   customizable
Tensile   Strength ≥ 18 MPa (adjustable based on   fabric)
Tear   Strength ≥ 80 N
Permeability ≤ 1.0×10⁻¹³ cm/s

Main features

  • High physical and mechanical performance in tensile strength, tear resistance, and puncture resistance
  • Excellent product properties: high strength, good elongation characteristics, and large deformation modulus
  • Superior material features: acid/alkali resistance, corrosion resistance, aging resistance, and excellent impermeability

Function

  • Impermeability: Used as an anti-seepage layer in road bases/embankments to prevent water infiltration, reducing subgrade softening/deformation while enhancing stability and durability.
  • Corrosion Protection: Serves as a protective barrier in bridges/culverts/tunnels against water/chemical corrosion, significantly extending structural service life.
  • Separation Layer: Maintains material integrity by preventing intermixing between different construction layers, ensuring engineering quality.
  • Reinforcement: When combined with soil/aggregate, forms reinforced layers that improve tensile strength/deformation resistance, increasing load-bearing capacity.
  • Settlement Control: Effectively mitigates pavement subsidence in soft soil areas by enhancing subgrade consolidation, maintaining road flatness.

Application scenarios

Composite geomembrane for road engineering

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