Curtain injection
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Curtain injection
Sealing by gelation, e. g. curtain or surface injection, is a highly effective alternative for the subsequent sealing of engineering and traffic structures as well as for buildings in building and residential construction. A prerequisite for successful subsequent sealing is knowledge of the cause of the moisture damage that has occurred.
Application aim
- Sealing of structures in contact with the ground or inundated with the ground from the inside out
 - Subsequent sealing of element walls
 - Filling of cavities and cracks (special proof of suitability required)
 - Subsequent sealing of leaking expansion joints
 - Subsequent injection of expansion joints between joint tape and water-resistant component surface
 
Filling material
- Acrylate gel
 
Demands on the injection packers
- Safe retention in the structural element during the injection at pressures depending on the injection method
 - Corrosion resistance of elements remaining in the structural element
 - Shut off option
 - Cross section adjusted to the required delivery and flow properties of the injection material
 - Check valves for low opening pressure
 
Demands on injection devices
- Forced delivery of the components at reliably adjustable mixing ratios
 - Powerful mixing head with check valves and cut off cocks
 - Mixing line suitable for the injection material
 - Separate high-pressure rinsing pump
 - Monitoring and documentation of injection and dosing processes - DESOI w.i.l.m.a., (please request consultation and brochure!)
 
Suitable objects
- Houses and industrial structures
 - Civil engineering structures
 - Civil and canal construction
 - Water engineering
 - Tunnelling
 
Types of packers
- Bore packers (steel)
 - Drive-in packers (polymer)
 
Fields of application
- The untight building component is drilled through from the inside to the outside
 - The low-viscosity, liquid injection material displaces the existing water and forms an elastic sealing layer and / or an elastic injection body, together with the surrounding building ground
 
Information on the injection methods
- Injections into the building ground are subject to compulsory notification according to art. § 49 of the Water Resources Act (German abbreviation WHG)
 - Prior to starting any gel injection work, a corresponding notification should be submitted to the competent Lower Water Authority and the Agency for Environmental Protection
 - Construction chemical products should be accompanied by a suitability certificate according to the principles of the evaluation by the German Institute for Building Technology (German abbreviation DIBt)
 - An expert engineer (competent planner) should be appointed with the planning
 
Injection of expansion joints
- Leaky expansion joints are usually sealed by partial curtain injection
 - Leaky construction joints are treated like cracks with regard to injections
 
Support measures
- Provision of technical advice and recommendations with regard to competent planners and specialists for the execution of the work involved
 - DESOI recommendation; technical specifications
 - DESOI ABC of injection: The reference work for construction experts
 - DESOI technical brochure: Sealing with injection methods
 - WTA information sheet; gel injection 5 – 20
 - STUVA ABI information sheet (edition 2014)
 
Extracting tool for lamella drive-in packer
Combine your extracting tool
In order to remove lamella drive-in packers from the construction element there are different extracting tools available, varying to the type of the packers. The extracting tool is screwed in or on the lamella drive-in packer and the impact weight is moved powerful into the pull-out direction. Step by step the packer is removed from the construction element.- Basis: Pull rod
 - Weights available individually between 1 kg and 1.4 kg
 
Advantages
- For the extraction of different types of packers
 - All adaptors can be combined with both pulling devices according to the application
 - Reusable product
 - Easy handling
 
Extracting tool
Application

