SCNF approved

When used in railway construction, geotextiles are typically placed between the different layers of the construction, such as the subgrade, which is the layer of soil or rock beneath the track bed, and the soil. They act as a separation layer, preventing the mixing of different soil types and helping to maintain the stability of the track bed. Geotextiles also help to improve drainage and reduce the risk of erosion by allowing water to pass through the fabric while keeping soil in place.

	Agreement N° 0293-2022	Agreement SNCF: IN 0261			Agreement SNCF: IN 0262 - EF 2 C 20 n° 4
	Geotextile A0	Geogrid G1	Geotextile A1	Geotextile A2s	Geotextile A2	Geotextile A3	Geotextile D2
Product	Filtration Separation underneath ballast	Filtration Separation network of drainage	Filtration Separation zone of overload railway	Filtration Separation outside overload zone	Filtration Separation outside overload zone	Separation on road access	Drainage outside overload zone
SNW 50			x	x	x	x	x
NW 16						x	x
NW 20						x	x
NW 25				x	x	x	x
HF 1300		x
RIGIDD 1100	x