TERRAM PW4 – Geocomposite Trackbed separator

Geocomposite Trackbed Separator - TERRAM PW4


Geocomposite Trackbed separator

TERRAM geosynthetics provide solutions for permanent way applications where loss of rail track alignment caused by sub-grade erosion leads to costly maintenance and the complication caused by having to plan and temporarily close the track for its renewal. TERRAM PW4 is a composite formed from TERRAM PW1 and E’GRID® geogrid. E’GRID® improves track life and performance by stiffening ballast laid over weak ground.

The advantage of TERRAM PW4 is the speed at which a geotextile filter and grid reinforcement can be laid in a single pass with the beneficial effect on construction costs.

The structure and composition of PW4 provides a long term mechanical performance and chemical resistance, even when used in very aggressive conditions.


  • PW4 provides the ideal dimensional characteristics for the effective interlocking of ballast within the geogrid apertures.
  • Manufactured using large aperture biaxial orientated geogrid developed specially for railway applications and use under ballast.
  • Improves the load bearing capacity of soil when placed at the base of ballast, constraining the aggregate by laterally confining it, providing the necessary support.
  • This product is predicted to be durable for more than 25 years in soils with a pH ranging from 2 and with a temperature of less than 25℃.
Further Information
TERRAM PW4 Factsheet
TERRAM PW4 Factsheet
Tapex Group

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