BGTwo-direction aggregate confinement
Biaxial PP geogrid
Integrally formed, punched and oriented polypropylene for unbound pavement and platform stabilisation.
Pavement geogrid supply · Australia-wideRapid technical response · Custom manufacture
Australian pavements · haul roads · working platforms
Build over soft ground. Keep aggregate working.
Kontain extruded polymeric geogrids confine unbound aggregate, protect weak formations and create options to extend pavement life or optimise granular thickness—supported by local selection, project data and rapid technical response.
Supply across Australia: nominate a grade for pricing or send the site conditions for a fit-for-purpose recommendation. Standalone grids and factory-bonded geotextile composites are available in standard and custom formats.
4 familiesBiaxial, triaxial and geotextile composites
2% / 5%Low-strain tensile response published
AU supportMRTS58 submission and project documentation
CustomAperture, strength, roll format and backing
Australian pavement systems
Four families. Selected around the ground and aggregate.
Start with the failure mechanism, not a preferred grid. Kontain matches stiffness, aperture, geotextile backing and roll format to the site conditions, then documents the exact product proposed.
BG
BGCStabilisation + separation + filtration
Biaxial composite
Biaxial grid factory-bonded to nonwoven geotextile for fine, wet or contamination-prone subgrades.
TGMulti-directional aggregate interaction
Triaxial polymeric geogrid
Radial-stiffness product family for variable traffic directions and multi-directional aggregate interaction.
TGCRadial response + separation + filtration
Triaxial geocomposite
Triaxial grid factory-bonded to a controlled nonwoven geotextile backing for soft, fine-grained or wet formations.
Preliminary system screen
Start with the ground. Then select the grid.
This tool applies Kontain's conservative no-design fallback logic. It retains the full unreinforced pavement thickness and does not claim a structural benefit.
Not a pavement design.Use the lowest representative design CBR and account for wet-season and disturbed strength.
CBR 4 to <5%Preliminary screen
Biaxial starting pointBG20 minimum fallback
Triaxial screenTG225 screening tier
Minimum overlap300–450 mm
Separation layerConfirm whether required
Grid-only is appropriate only where separation and filtration are confirmed unnecessary.
Authority specifications, approved drawings and project-specific engineering always take precedence.
Where stiff geogrids add value
One interlock mechanism. Three different project outcomes.
Mechanically stabilised aggregate can improve constructability and pavement performance, but the benefit assigned in design must match the ground, aggregate, loading and exact grid proposed.
Construction over soft ground
Create a stable working layer
Mechanical interlock confines aggregate, limits lateral movement and reduces intrusion into weak formations so fill can be placed progressively from the covered side.
Retain design thickness
Extend pavement life
Where permanent deformation governs, stabilising the granular layer can reduce rut development and maintenance demand while retaining the original pavement section.
Retain design performance
Optimise granular thickness
A project-specific comparison may support less aggregate for the same performance target when the design method and evidence apply to the supplied grid, aggregate and layer position.
Most useful on weaker formations.
The opportunity is generally strongest where the representative subgrade CBR is 6% or lower. As formation quality improves, the achievable thickness or design-life benefit commonly becomes less pronounced. Thickness reduction and life extension are alternative design pathways and should not be added together.
Request a project reviewSystem decision
Grid-only is not always the complete answer.
A grid restrains aggregate movement. It does not automatically retain subgrade fines, control water or repair loss of bearing support.
Grid only
Use where the formation is reasonably firm and stable, and filter compatibility confirms that subgrade migration is not a credible mechanism.
- Aggregate confinement
- Load distribution
- No filtration function
Composite
Use where mechanical stabilisation and a continuous separator/filter are both required. Place the nonwoven side to subgrade unless the design states otherwise.
- Grid + nonwoven in one roll
- Faster placement
- Bond integrity must be controlled
Separate layers
Use where the geotextile grade, chemistry, filter criteria or grid elevation must be selected independently.
- Independent material selection
- Greater design flexibility
- Two deployment operations
Technical performance range
Compare the properties that change field response.
Use low-strain response, junction performance, aperture geometry, radial stiffness and the complete grid-geotextile system—not ultimate tensile strength alone.
Kontain BG Series
Directional values shown MD / TD| Property | Test / data basis | Unit | BG15 | BG20 | BG30 | BG40 |
|---|---|---|---|---|---|---|
| Ultimate tensile strength | ASTM D6637 | kN/m | 15 / 15 | 20 / 20 | 30 / 30 | 40 / 40 |
| Tensile strength at 2% strain | ASTM D6637 | kN/m | 5 / 5 | 7 / 7 | 10.5 / 10.5 | 14 / 14 |
| Tensile strength at 5% strain | ASTM D6637 | kN/m | 10.5 / 10.5 | 14 / 14 | 21 / 21 | 28 / 28 |
| Strain at ultimate strength | ASTM D6637 | % | 13 / 13 | 13 / 13 | 13 / 13 | 13 / 13 |
| Junction efficiency | GRI-GG2 | % | 93 | 93 | 93 | 93 |
| Flexural rigidity | ASTM D7748 | mg-cm | 250,000 | 750,000 | 2,000,000 | 4,800,000 |
| Aperture stability | COE method | m-N/deg | 0.32 | 0.50 | 0.75 | 0.98 |
| Nominal aperture | Nominal | mm | 36 / 36 | 35 / 35 | 34 / 34 | 33 / 33 |
| Typical roll width × length | Nominal | m | 3.95 × 75 | 3.95 × 50 | 3.95 × 50 | 3.95 × 50 |
BG Series: Values are shown machine direction / transverse direction. BG15 is designer-selected; BG20, BG30 and BG40 form Kontain's standard preliminary selection range.
Australian project supportMRTS58 Type 1 and Type 2 project selections supported
Kontain can nominate the appropriate pavement-grid class for suitable projects and prepare a product compliance schedule for the exact grade and configuration offered. The proposed system is reviewed against the current contract specification before formal submission.
- Project compliance schedule
- Certificates of analysis
- Lot and roll traceability
- Supporting test documentation
Technical data sheets
Kontain-branded data. Ready to download.
Each selectable-text PDF contains the product schedule, selection position, field installation controls and MRTS58 project-compliance pathway.
Biaxial PP geogrid
BG15, BG20, BG30 and BG40.
Biaxial composite
GT150 and GT200 backing classes.
Multi-directional geogrid
TG145 to TG295 radial classes.
Triaxial geocomposite
Radial grid with GT150 or GT200 backing.
Installation + selection guide
Extruded stiff geogrids for pavements, haul roads and working platforms.
Installation controls
Keep plant off exposed grid. Build forward from cover.
Installation is part of the system performance. Most avoidable failures begin with uncontrolled formation, open laps, inadequate cover or plant contact.
Default ruleNo direct trafficking on exposed grid or composite.
- 01
Prepare
Trim and assess formation. Treat pumping, deep rutting, isolated voids and damaging protrusions before rollout.
- 02
Deploy
Unroll flat and taut. Orient to the plan, shingle in the fill direction and place composite nonwoven to subgrade.
- 03
Cover
End-dump onto placed fill and spread forward. Do not dump, turn or brake on exposed product.
- 04
Compact
Maintain cover, use plant suited to the formation, monitor movement and stop if rutting or pumping progresses.
Overlap
CBR-based side laps
- CBR >2%
- 300–450 mm
- CBR 1–2%
- 600–900 mm
- CBR 0.5–1%
- 900 mm
- All roll ends
- 900 mm minimum
First lift
Minimum compacted cover
- Firm formation
- 200 mm default
- CBR ≤2% / unstable
- 300 mm or more if designed
- Higher grade grid
- Does not justify less cover
Stop work
Do not “work it in”
Stop if the grid moves, folds, tears, delaminates or becomes exposed—or if progressive rutting, lateral wave, pumping or fines appear.
Damage repair: expose only as required, correct the cause, use the same approved product and orientation, and extend the patch at least 1.0 m beyond every side of the damaged area. Record before cover.
Field documentKontain pavement geogrid installation + selection guide
Download installation guide Formation acceptance, overlaps, first-lift placement, cover, repairs, hold points and two-layer engineering considerations.
Project-direct flexibility
Custom-fit the product to the site—not the other way around.
Kontain matches aggregate size, traffic duty, subgrade condition, aperture, stiffness, geotextile backing and roll format to Australian project requirements—then documents exactly what will be supplied.
01Aggregate fit
Review D50, Dmax, grading, angularity and compaction against aperture geometry and construction damage risk.
02Traffic + stiffness
Select biaxial or radial response around wheel paths, passes, axle load, tyre pressure and granular layer position.
03Composite backing
GT150 and GT200 nonwoven backing classes selected for filtration, separation, survivability and site moisture conditions.
04Manufacture + response
Project-specific strength, aperture and roll format, with rapid technical review and programme-focused supply.
Geogrid supply quote
Request a price—or a product recommendation.
Nominate a product for pricing or send the pavement section, design CBR basis, aggregate grading and Dmax, traffic duty, quantities, location and programme for a fit-for-purpose supply recommendation.
Project submission support
Kontain reviews the proposed product against the project specification before formal submission.
Product schedule
Exact grade, roll format, backing and declared performance.
Compliance
MRTS58 type or project clause response prepared for the proposed system.
Delivery control
Certificates of analysis, batch traceability and project-specific documentation.