Geogrids
Engineered grids that distribute load and reinforce weak subgrades for roads, slopes and retaining structures.
What It Is
Geogrids are polymer grid structures — manufactured from high-density polyethylene, polypropylene, polyester or coated fibreglass — with regular apertures that interlock with surrounding soil or aggregate particles. This interlock confines and redistributes load across a wider area, reducing vertical stress on the underlying subgrade. Uniaxial geogrids provide high strength in one direction for retaining walls and steep slopes; biaxial and triaxial geogrids distribute load multi-directionally for road and railway sub-base reinforcement; fibreglass geogrids reinforce asphalt overlays against reflective cracking. Willem Olaf supplies geogrids proven to extend pavement life and reduce construction costs on Nigeria's soft, laterite-heavy soils.
Key Properties / Technical Overview
Representative values across the range. Confirm exact figures for the selected grade on the product datasheet.
| Property | Value |
|---|---|
| Aperture size | 25 – 40 mm |
| Tensile strength (machine direction) | 20 – 200 kN/m |
| Junction efficiency | ≥ 93% |
| Tensile strength at 2% strain | ≥ 8 kN/m |
| Material | HDPE, PP, PET or coated fibreglass |
| Design life (buried) | Up to 100 years |
Applications
- Rehabilitation of failed roads on weak laterite subgrades
- Reinforcement of slopes and embankments
- Mechanically stabilised earth (MSE) retaining walls
- Railway sub-base reinforcement
- Stabilisation of soft or swampy ground
- Reflective crack control in asphalt overlays (fibreglass grids)
Benefits
Reduced Pavement Thickness
Distributes wheel loads to cut sub-base depth and aggregate volumes.
Extended Pavement Life
Limits rutting and cracking on weak laterite and clay subgrades.
Faster Construction
Stabilises soft ground quickly, even during the rainy season.
Available Specifications
| Product | Type / Class | Tensile Strength | Roll Size |
|---|---|---|---|
| Uniaxial Geogrid | TGSG 30 – 200 | 30 – 200 kN/m (MD) | 2 – 6 m × 50 m |
| Biaxial Geogrid | BX 11 – 30 | 11 – 30 kN/m (both directions) | 3.95 – 5.95 m × 50 m |
| Triaxial Geogrid | TX 130 – 190 | 130 – 190 kN/m (multi-directional) | 3.95 – 4.75 m × 50 m |
| Fiberglass Geogrid | GG 50/50 – 100/100 | 50 – 100 kN/m | 1.0 – 6.0 m × 100 m |
Download the Datasheet
Get full technical specifications, test methods and installation notes for this product range.
Download PDF DatasheetSpecify Geogrids for your project
Send us your project details and our technical team will respond within 24 hours with recommendations and a quote.