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In case of crack repair with cement suspension and cement paste, cracked structural elements are repaired by means of non-positive injection. The cracks are injected so that no more water can penetrate after the injection process is completed. The injection material forms a protection against the penetration of aggressive substances and prevents corrosion of the reinforcement. The load-bearing capacity of the structural elements is restored by the frictional connection of the crack flanks.
Creation of frictional connection of cracked building components
Creation of a connection guaranteeing tensile and compression strength
Masonry consolidation and stabilisation
Demands on injection packer
The material of the packers (parts of packer) must be appropriate for the used injection material
Safe retention in the structural element during the injection at pressures depending on the injection method
Corrosion resistance of the parts remaining in the building
Possibility of shutting off
Cross section adjusted to flow properties of injection material
No reduction of cross section in the packer and connection system
Residential buildings, industrial structures
Buildings of masonry and concrete
Natural stone buildings
Historic and listed buildings
Civil engineering and water engineering
Canal-, harbour-, and river engineering
Injection with low- and high pressure method
» The special material caracteristics of the adhesive packer support the adhesive bond between the adhesive and adhesive surface of the packer.
The adhesive packers resist to high injection pressures depending on the adhesion with the soil.
Saving of time and material
» With the Klebfix (approx. 6 g) the adhesive is applied on the adhesive surface of the packer
» The sealing material is spread on the crack surface
On non-wet surfaces
Structural elements with dense reinforcement
For a width of crack from approx. 0.2 mm with filling material cement
Placing of the adhesive packers
Roughen the surface on both sides of the crack depending on structural element, remove any debris or loose particles, dust etc.
Distance between packers depends on thickness of structural element (normally: thickness of structural element = distance between packers)
Keep the injection channel free by driving a greased steel pin into the crack
Seal the crack with sealing material, but stop at the end of crack for deseration and control of filling level
Remove all steel pins and screw a locking tappet on the the packer, open it and start injection
Inject from bottom to top
Close locking tappet when air and filling material is coming out of the adjacend packer
Continue injection with the next packer
Re-inject each packer within the pot life of the packer
Once the injection material is hardened remove the packer and sealing material
A test injection on the object is recommended before application
Pre-wet the crack or void before starting injection with mineral filling material
Range of application
Dry and humid structural elements
For the filling of cavaties
Low- and high pressure injection into structures
Demands on the injection packers
Compatibility of materials (packer components) with fillers used
Reliable fixing in the component at the process-related injection pressures
Corrosion resistance of the parts remaining in the structure
Drill alternately at an angle of 45° to the crack to hit the crack in the middle of
the component (depending on the object)
Clean (e. g. with compressed air) and prepare the boreholes, depending on the
filler set and clamp packer (in the case of dry cracks, prewet crack flanks)
Close crack with insulating material, leave crack end free for venting and level
control, at the highest point for vertical cracks
Inject the packer until the crack filler emerges from the next packer, reinject
each packer within the processing time of the crack filler
After the injection the injection packers are removed or non-corrosive parts can
remain in the building (agreement with the builder required)
The insulation prevents the filler from escaping during injection
Repair of leaks with fast-reacting substances
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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.