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DuraForce® AS Geotextile
DuraForce® AS series geotextile is manufactured and tested to exact quality standards and rated according to the NZTA F/7 specification for geotextiles.
There is an extensive range of geotextiles available. Due to the process by which they are manufactured, different performance capabilities can be achieved. Frequently there will be a secondary function required of the geotextile as well as the primary function, e.g. drainage as the primary function and separation as the secondary.
Non-woven needle-punched geotextiles are manufactured from the extrusion of fibres which are laid down on a manufacturing ‘bed’ and then needle punched. This manufacturing process allows for the use of nonwoven geotextiles in applications of drainage, filtration and protection.
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Frequently Asked Questions
What are the main uses?
- Filtration, separation and reinforcement.
- Needle punched is preferable for filtration, and woven is tougher for reinforcement.
- Both will effectively separate soil layers.
Why do some geotextiles seem thinner than others of the same grade?
Some geotextiles appear thinner than other brands for the same strength class owing to the manufacturing process. If the textile is needled punched further, to get effective interlock of the fibres, it can appear thinner for the same mass and strength. If a geotextile of the same weight appears thicker and fluffier the difference is probably only fresh air, and who wants to pay for fresh air?
Where/why should I use geotextile?
As a separation layer between two matierials e.g clay base and GAP40. This will prevent the two materials mixing which wastes expensive aggregate.
For reinforcing/strengthening the ground. This will ensure your surface is more stable for years to come. Particularly useful with peat/unstable clay ground conditions.
For filtration as the geotextile allows the displacement of water across the relevant area.
How do I compare it with other brands?
Woven geotextiles are usually compared by tensile strength which we read on the data sheet. Nonwoven needle punched geotextiles are usually graded according to the NZTA specification F/7. For heavier grades which are not in the F/7 specification comparison is most commonly by fabric weight in grams/m² or tensile strength.
How much do I need to overlap the geotextile?
NZTA F/7 gives guidance on overlap of geotextiles, which is dependent on the strength of the subgrade. The minimum recommended overlap is 300mm.
Benefits & Features
- Compliant with NZTA F/7 requirements for strength and filtration
- Large range of grades to provide the right product for each application
- Available in both polypropylene and polyester
- Large stock holding nationwide to provide fast delivery
Specifications
Code
Product
Size
13649
DuraForce AS240
1.9m x 50m (95m²)
13888
DuraForce AS240
3.9m x 50m (195m²)
13820
DuraForce AS240
4m x 100m (400m²)
76339
DuraForce AS240
6m x 100m (600m²)
13650
DuraForce AS280
1.9m x 50m (95m²)
13889
DuraForce AS280
3.9m x 50m (195m²)
13415
DuraForce AS280
4m x 100m (400m²)
76342
DuraForce AS280
6m x 100m (600m²)
Code
Product
Size
13913
DuraForce AS410
1.9m x 50m (95m²)
13914
DuraForce AS410
3.9m x 50m (195m²)
13821
DuraForce AS410
4m x 100m (400m²)
76345
DuraForce AS410
6m x 100m (600m²)
13368
DuraForce AS440
4m x 100m (400m²)
13439
DuraForce AS440
6m x 100m (600m²)
13651
DuraForce AS640
4m x 75m (300m²)
13661
DuraForce AS640
6m x 75m (450m²)