NorGeoSpec is a Nordic scheme for certification, specification and control of geotextiles used for separation and filtration on the road. Certification and specification are based on a number of characteristics determined by standard test methods defined by CEN and ISO. SINTEF Building and Infrastructure is NorGeoSpec's certification body.
Test values and tolerance for the following properties are included:
- Tensile strength
- Energy index
- Static piercing test
- Dynamic piercing test
- Size of opening IF APL (e.g. drainage, tunnels…)
The system also includes a quality control system and guidelines for selecting the relevant specification profile. The choice of specification profile is based on ground conditions, grain size of the filling material and a combination of conditions during construction and quality requirements of the road.