Geogrids & Interlayers
TechGrid TGU Uniaxial Geogrid 40–600 kN/m | Africa Supply
Uniaxial knitted polyester geogrid - TechGrid TGU, 40 to 600 kN/m, supplied and installed for reinforced soil walls, slopes and embankments across Africa.
Overview
TechGrid TGU is a range of uniaxial geogrids engineered for demanding soil reinforcement. High-tenacity polyester yarns are formed into a dimensionally stable grid with uniform apertures using weft-insertion warp knitting, then finished with a durable polymeric coating that resists installation damage and holds the grid stable during placement and compaction.
Grades run from TGU 40/20 to TGU 600/30, giving a single product family for everything from low garden and access-road walls to heavily loaded basal reinforcement beneath embankments on soft ground. Because the whole range shares one construction, aperture geometry and roll format, a design can step up or down a grade without changing soil interaction assumptions or installation method.
All grades are supplied in 5.1 m × 100 m rolls - wider than most uniaxial geogrids - so large walls and slopes are covered with fewer overlaps and less cutting. Each grade carries published reduction factors for creep, installation damage and environmental exposure, giving long-term design strengths for a 120-year design life in sand, silt and clay fills between pH 5 and 9.
TechGrid is manufactured in ISO 9001:2015 certified facilities, with raw materials and finished product tested in GAI-LAP accredited laboratories. We hold stock in Johannesburg and deliver to more than 30 African countries, with mill certificates supplied against every consignment.
Geosynthetics Africa supplies TechGrid TGU as material only or as an installed scope by our own IAGI-aligned crews, with engineering support from grade selection through to final sign-off.
- MaterialHigh-tenacity polyester (PET) yarn, polymeric coating
- StructureUniaxial geogrid, weft-insertion warp knitted, 30 × 25 mm apertures
- ColourBlack
- StandardISO 9001:2015; tested to EN ISO 10319
- Roll Width5.1 m
- Roll Length100 m (51 m² per roll)
Typical Properties
| Property | Test Method | Unit | Typical Value |
|---|---|---|---|
| Composition | - | - | Knitted high-tenacity polyester, polymeric coated |
| Tensile strength, ultimate (MD) | EN ISO 10319 | kN/m | ≥ 40 to ≥ 600 by grade |
| Tensile strength, ultimate (CD) | EN ISO 10319 | kN/m | ≥ 20 to ≥ 30 by grade |
| Elongation at ultimate (MD & CD) | EN ISO 10319 | % | 10 (± 2) |
| Creep reduction factor, RF-CR (120 yr, 20°C) | EN ISO | - | 1.45 |
| Creep-limited strength | EN ISO | kN/m | 27.6 to 413.8 by grade |
| Installation damage factor, RF-ID (sand/silt/clay) | - | - | 1.02 to 1.04 |
| Environmental partial factor (pH 5 to 9) | - | - | 1.07 |
| Long-term design strength, 120 years (sand/silt/clay, pH 5 to 9) | - | kN/m | 24.8 to 379.1 by grade |
| Aperture size (tolerance ± 2 mm) | - | mm | 30 × 15 to 30 × 25 by grade |
| Roll width × length | - | m | 5.1 × 100 |
| Roll area | - | m² | 510 |
| Design life | - | years | 120 |
Note: The above values are typical and not intended for specification purposes. Please refer to the product datasheet for full details.
Typical Applications
View all applicationsRetaining Walls & MSE Structures
Reinforces the fill behind segmental block, concrete panel, gabion and wire-faced walls.
Reinforced Soil Slopes
Allows slopes to be built far steeper than unreinforced earthworks, creating more usable land.
Bridge Abutments
Supports approach embankments and reinforced soil abutments carrying bridge and traffic loads.
Embankments Over Soft Ground
High-strength basal layers let embankments be built safely over soft, compressible soils.
Mining Tip Walls & ROM Pads
Reinforced soil walls for crusher tip walls and ROM pads carrying heavy haul truck loads.
Compatible Systems
View all systemsTensar® RE – HDPE Uniaxial Geogrid
Monolithic HDPE geogrid, punched and drawn from a single polymer sheet, with integral junctions that carry 95% of the grid's strength. Tensar uniaxial geogrids were the first commercially available geogrids and are now in their fourth generation. Six grades from RE510 to RE580, with ultimate tensile strengths of 42–137 kN/m, supplied in 1.3 m wide rolls. Ideal for segmental block and concrete panel walls, and bridge abutments.
Tensar® UX – HDPE Uniaxial Geogrid
Integrally formed HDPE geogrid, punched and drawn for positive mechanical interlock with the fill and high junction strength. Six grades from UX1100MSE to UX1800HS, with ultimate tensile strengths of 58–210 kN/m, supplied in 1.33 m wide rolls. Suited to MSE walls, reinforced slopes, embankments and temporary walls.
MIRAGRID® GX – Knitted Polyester Uniaxial Geogrid
Flat-knitted, high-tenacity polyester geogrid with a black polymeric coating, combining high tensile strength with low creep. Straight machine-direction ribs minimise strain during construction, and the lightweight rolls are easy to cut and place. Six grades from GX 35/20 to GX 200/30, with ultimate tensile strengths of 35–200 kN/m, supplied in 5.2 m wide rolls. Suited to MSE walls, reinforced slopes and embankments.
TechGrid TGU – Knitted Polyester Uniaxial Geogrid
Warp-knitted, high-tenacity polyester geogrid with a durable polymeric coating for dimensional stability and resistance to installation damage. Nine grades from TGU 40/20 to TGU 600/30, with ultimate tensile strengths of 40–600 kN/m, supplied in 5.1 m × 100 m rolls. Suited to everything from low retaining walls to heavily loaded basal reinforcement of embankments over soft soils.
Installation Guidance
Standard Method Statement
Prepare a level, compacted foundation and remove any soft spots. Lay the geogrid with its strength direction (the roll length) perpendicular to the wall or slope face, in one continuous length with no joints in that direction.
Pull each layer taut to remove slack, then spread and compact fill in layers to the specified thickness. Keep tracked plant off exposed geogrid and maintain at least 150 mm of cover before trafficking.
Connection details, overlaps and fill requirements vary by product and facing system, so always follow the manufacturer's installation guideline and the project specification. Our team provides on-site technical support and IAGI-aligned installation across every range we supply.
Quality Assurance & Testing
Field QA/QC Checklist
- Delivery & Storage: Rolls identified to ISO 10320, stored flat and protected from UV until installation.
- Material Conformance: Certificates checked against the design: ultimate tensile strength (ISO 10319 / ASTM D6637) and long-term design strength including creep (ISO 13431 / ASTM D5262).
- Orientation & Length: Primary strength direction laid perpendicular to the wall face; reinforcement lengths and vertical spacing checked against the design drawings.
- Tensioning & Connection: Reinforcement pulled taut before fill; facing connections made to the system's tested detail.
- Fill & Compaction: Fill material and compaction checked against the specification; lightweight compaction plant within the zone near the face.
Manufacturing Standards
- ISO 10319 / ASTM D6637 tensile strength
- ISO 13431 / ASTM D5262 creep testing
- FHWA-NHI-10-024 MSE wall design and construction (where applicable)
- Manufacturer QC certificates per roll
- ISO 9001:2015; tested to EN ISO 10319
Documents
Product Selection Guide
Compare performance properties across the entire category hierarchy before specifying.
Installation & Method Statement
Standard deployment procedures, installation specifications, and field application method statements.
QA/QC Site Checklist
Field quality control procedures, inspection checklists, and testing standards to verify installation integrity.
Technical Data Sheet (TDS)
Guaranteed minimum average roll values (MARV) and material testing properties.
Chemical Resistance / Accessories Guide
Chemical compatibility matrix and list of auxiliary materials needed for installation.
Projects Using TechGrid TGU Uniaxial Geogrid 40–600 kN/m | Africa Supply
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