A great blog explaining what turf reinforcement mats (TRMs) are, how they work and what types of TRMs PFA has to offer.
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.
mastaGRID® Poly Rigid Biaxial Geogrid: 40/40 – 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.
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.
| GGPB2020 | mastaGRID® Poly Geogrid 20/20 – 3.95m x 50m |
| GGPB3030 | mastaGRID® Poly Geogrid 30/30 – 3.95m x 50m |
| GGPB4040 | mastaGRID® Poly Geogrid 40/40 – 3.95m x 50m |
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.
mastaGRID® Poly Rigid Biaxial Geogrid: 40/40 – 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.
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.
| GGPB2020 | mastaGRID® Poly Geogrid 20/20 – 3.95m x 50m |
| GGPB3030 | mastaGRID® Poly Geogrid 30/30 – 3.95m x 50m |
| GGPB4040 | mastaGRID® Poly Geogrid 40/40 – 3.95m x 50m |
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.
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 specializes 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.