Bi-planar Drainage Geonets consist of two layers of non-woven geotextile bonded to a high strength HDPE Geonet core. They are designed for in-plane flows over large surface areas. The Geonet core is UV stabilised with 2% Carbon Black and is chemically and biologically resistant. Available in 2m and 4m wide rolls with a 10cm fabric overlap, each batch is tested and quality certified.
Bi-planar geonets have a low intensity but high elongation and are suited for projects where the foundation is reasonable or the bearing capability demand is low, such as parks, temporary roads, banks and slopes. Geonets can be used in place of soil drains in civil and environmental applications such as under-slab drainage, leak detection, gas venting, leachate collection and as additional protection for waterproofing membranes.
| Properties | CE111 | CE121 | CE131 | CE131B | CE151 |
|---|---|---|---|---|---|
| Width (m) | 2.5 | ||||
| Length (m) | 50-100 | ||||
| Aperture (mm) | 8-6 | 8-6 | 27-27 | 22-22 | 74-74 |
| Tensile Strength >= (kN/m) | 2.0 | 7.68 | 5.8 | 6.4 | 1.82 |
| Elongation at maximum strain <= (%) | 41.0 | 20.2 | 16.5 | 18.6 | 23.2 |
| Tensile strength at 10% strain >= (kN/m) | 1.32 | 6.80 | 5.20 | 5.74 | 3.83 |
Tri-planar Drainage Geonets consists of two outer layers of inclined ribs separated by strong vertical ribs. The whole structure is bonded to a non woven geotextile. The high compressive strength resists crushing and the geotextile delivers a high flow rate under load while preventing soil particles blocking the drainage core. The top and bottom auxiliary ribs also reduce the depth the geotextile intrudes into the core.
Triplanar geonets can also be supplied without a geotextile.
| Physical Properties | Test Method | Units | Type | Mark | ||
|---|---|---|---|---|---|---|
| AYDT1 | AYDT2 | |||||
| Composition | / | / | 3 ribs | 3 ribs | / | |
| Polymer | / | / | HDPE | HDPE | / | |
| Additive | / | / | Carbon black | Carbon black | / | |
| Geometric Properties | ||||||
| Thickness | V=20kPa | ISO9863 | mm | 7.0 | 7.6 | a |
| V=200kPa | ISO9863 | mm | 6.5 | 7.0 | a | |
| Unit weight | ISO9864 | g/m2 | >=1250 | >=1550 | a | |
| Roll width | / | m | 4.00 | 4.00 | a | |
| Roll length | / | m | 25.0 | 25.0 | a | |
| Roll diameter | / | m | 0.50 | 0.53 | a | |
| Technical Characteristic | ||||||
| Transmissivity water | V=20kPa | ISO12958 | l/m/s | 2.60 | 3.00 | a,b,c,d,e |
| V=100kPa | ISO12958 | l/m/s | 2.40 | 2.80 | a,b,c,d,e | |
| V=200kPa | ISO12958 | l/ms | 2.20 | 2.60 | a,b,c,d,e | |
| V=500kPa | ISO12958 | l/ms | 1.80 | 2.20 | a,b,c,d,e | |
| V=1000kPa | ISO12958 | l/ms | 1.30 | 1.50 | a,b,c,d,e | |
| Tensile Strength (KN/M) | ISO10319 | KN/m | 12 | 14 | a,b,e | |
| Elongation, % | ISO10319 | KN/m | 20 | 20 | a,b,e | |
Mark:
a= representative value
b= longitudinal
c= 2mm HDPE condition of pad border
d= l/m/s= 1.0E-3 m2/s
e= transmissivity and tensile strength tested every 25000m2
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Biplanar and Triplanar Geonets