Drainage unit with external covering and method for...

Details Drainage unit with external covering and method for... Drainage unit with external covering and method for...

E - Fixed Constructions

02

B

E02B 11/00 (2006.01)

Patent

CA 2636585

Drainage units and methods of their manufacture, the drainage units (20) comprising lightweight aggregate (21) held within a sleeve (22) having an exterior surface with at least a portion of exterior surface comprising a barrier material (28) substantially impervious to solids.

La présente invention concerne des unités de drainage et des procédés de fabrication de ceux-ci, les unités de drainage comprenant des agrégats légers contenus dans une enveloppe présentant une surface extérieure, une partie au moins de la surface extérieure comprenant un matériau-barrière essentiellement imperméable aux solides.

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