Reinforcement element with separation and filtration function Home » Solutions » Railway construction » Reinforcement element with additional separation and filtration function Reinforcement element with additional separation and filtration function Geogrid reinforcement Combigrid® 40/40 Q1 GRK 4 DB Functions: Soil reinforcement (without design calculation) Separation and filtration Requirements of Deutsche Bahn: Manufacturer related product qualification (HPQ) according to application 3.5* Biaxial geogrid Separation and filtration Tensile strength ≥ 40kN/m Mechanically bonded nonwoven geotextile GRK 4 Advantages: Immediate interlocking with cover aggregate (no production specific elongation) High resistance against chemical and microbial attack Cost savings with reduced base course thickness *Our geosynthetic product specifications are in line with the German manufacturer related product qualification (HPQ, Application number according to DB Standard 918 039 „Technical delivery conditions for Geosynthetics in railway constructions“, Deutsche Bahn AG) All mentioned products types are exemplary according to the above-mentioned specifications. The product types can vary according to local requirements or customer requests. Want to work with us? Get in touch Solutions Civil engineering Railway construction Tunnel construction Hydraulic engineering Landfill engineering Groundwater protection Mining Services Engineering support Installation Software Products Geogrids Geomembranes Drainage Mats Geotextiles Sand containers Erosion control Info center News Videos Flyer and Brochures Specifications Environmental product declaration Case studies Publications Naue Mission Sustainability Naue Group Naue Asia Naue Sealing Career Quality History Memberships Site NoticePrivacy PolicyContactCustomer Center Copyright 2021 Naue GmbH & Co. KG | All Rights Reserved Privacy Preference We use cookies on our website. Some of them are essential, while others help us to improve this website and your experience. Essential Statistics External Media Accept all Save Individual Privacy Preferences Cookie Details Privacy Policy