Impermeable materials
Geosynthetic materials
Tunnels
Bituminous products
Test methods
Performance
Sealing materials
Construction engineering works
Polymers
Clay
Geosynthetic barriers
Geotextiles
Underground structures
Construction materials
Link: BS EN 13491:2018 Geosynthetic barriers. Characteristics required for use in the construction of tunnels and associated underground structures
Source: BSI Standards
