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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.
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
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!)
Houses and industrial structures
Civil engineering structures
Civil and canal construction
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
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)
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As one of the worldwide leading manufacturers of injection equipment, DESOI offers you the full range of high quality machines, materials, and packers. In addition, we offer a wide range from product development over construction up to drilling, milling, welding and assembly works.