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Rigid Geogrid

mastaGRID® Poly Geogrid 20/20 – 3.95m x 50m

Product Code: GGPB2020

Polyfabrics recommended the mastaGRID® Poly to provide sub-grade reinforcement under the crushed rock pavement, mastaGRID® Poly is a rigid biaxial geogrid commonly used for subgrade reinforcement, rock stabilisation and erosion control.

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mastaGRID® Poly Rigid Biaxial Geogrid: 20/20 – 3.95m x 50m

mastaGRID® Poly is a rigid biaxial geogrid commonly used for subgrade reinforcement, rock stabilisation and erosion control. It is available in a range of strengths, while maintaining isotropic tensile strengths.

Chemical & Biological Resistance

mastaGRID® Poly is a biaxial geogrid manufactured from polypropylene which is unaffected by all chemicals, including acids, alkalis and salts, normally found in soils. It is not a nutrient, and therefore, unaffected by micro-organisms in soil.

mastaGRID® Poly provides the following benefits:

  • Distribution of loads and therefore reduction in stress concentration over the soil
  • The geogrid’s structural junctions, rigid ribs and thick walls help lock aggregate, increasing its shear resistance
  • As a result when a vertical load is applied the aggregate is restrained by the ribs reducing deformation. (Lateral Restraint)
  • Decrease in long term deformation (Creep)
  • Increase in load distribution. (Bearing Capacity Increase)
  • Controls differential settlement

Geotextiles VS Rigid Geogrids

Rigid geogrids behave differently to woven & non-woven geotextiles. Geotextiles transmit stresses to the soil through friction. They do not interlock with the aggregate the same way as a rigid geogrid with the thick ribs. For a geotextile to provide reinforcement it must go into tension (Tension Membrane Effect) and for this to occur it requires large deformation and fixed wheel paths. This is difficult to control and design, as a result the only function it achieves is separation.

The transmission of stress between soil and geogrid is obtainable only if the geogrid is rigid with integral junction. A woven geogrid constructed of high tensile polymer strands, can hardly develop this function, as the structure is not integral and the transversal ribs can move along the longitudinal ribs without developing any interlocking effect. A properly chosen geogrid with angular rock is able to change the boundary conditions through three main mechanisms: (a) Confinement Effect (or Lateral Restraint); (b) Load Distribution and (c) Tension Membrane Effect.

All Options Available

GGPB2020mastaGRID® Poly Geogrid 20/20 – 3.95m x 50m
GGPB3030mastaGRID® Poly Geogrid 30/30 – 3.95m x 50m
GGPB4040mastaGRID® Poly Geogrid 40/40 – 3.95m x 50m

Railways embankment widening & track realignment video



  • Subgrade reinforcement
  • Rock stabilisation
  • Erosion control


  • mastaGRID® Poly Geogrid 20/20 Product Spec SheetDownload
  • mastaGRID® Poly Geogrid 30/30 Product Spec SheetDownload
  • mastaGRID® Poly Geogrid 40/40 Product Spec SheetDownload
  • Rigid Biaxial sub-grade reinforcementDownload
  • Case Study – Green OrganicsDownload
  • Case Study – Rail DuplicationDownload
  • Case Study – mastaGRID® 2020SXDownload
  • Case Study – Amaroo EstateDownload
  • Latest CatalogueDownload
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Meet the Team

Raymond Chow has been involved with the geosynthetics industry for over 15 years. Graduating with a First Class Honours degree in Civil Engineering at the University of Sydney, Raymond specialiSes in retaining wall designs, soft ground improvement, channel and slope protection, and on-site storm water management.

Raymond has been on various technical committees addressing geosynthetics, including testing, specification and durability issues.

Join our next session by emailing us at technical@polyfabrics.com.au

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