Technology
Bentonite mats
Self-sealing waterproofing for foundations, walls and base slabs – even on fresh, damp concrete.
How it works
Bentonite mats
Bentonite mats are geosynthetics used mainly for waterproofing and are ideal for vertical and horizontal foundation surfaces. They are characterised by strong swelling properties and low permeability, which allows them to protect the structure effectively against water ingress. The bentonite mat system is also available combined with a high-strength polymer film and is used mainly in projects requiring additional chemical resistance and low water vapour permeability.
Thanks to their self-sealing properties, bentonite mats remain effective for many years. Installation is quick and easy even in difficult conditions, and their robust construction eliminates the need for an additional protective concrete layer.
Applications
- Under foundation slabs
- Permanent excavation shoring
- Backfilled walls
- Cut-and-cover tunnels
- Underground structures
- Underground structures built with diaphragm walls
The bentonite membrane system for below-ground parts of buildings consists of three variants designed for installation in different environments
- A durable, highly flexible and watertight membrane consisting of a layer of granular natural sodium bentonite permanently bonded to a high-density polyethylene film
- A standard membrane with additional protection of the bentonite by a hydrophobic polypropylene mesh, which protects it against mechanical damage, cement slurry draw-off and rain.
- A standard membrane using sodium bentonite modified for use in highly saline water.
Advantages
- High productivity allowing structural and waterproofing works to be synchronised
- Immediate waterproofing performance
- Flexibility to bridge cracks and fissures in the substrate
- Strong bonding with concrete prevents water migrating beneath the bentonite layer
- Resistance to point punctures
- Resistance to temperature changes
- Can be installed even in adverse weather
- Can be installed on fresh, damp concrete
- Easy to combine with other types of waterproofing
Projects
