Örg Jude GebÄudetechnik
Subsequent horizontal blocking
Pressure injections are especially applied to severely thoroughly damp or capillary saturated masonry, because even poricidal spaces can be filled up with injection material which are capillarily not accessible. To this the drilling holes are drilled with a distance of 10 to 12cm and a diameter of 14 to 25mm.
The drilling hole is drilled diagonally down with a drill angle up to 20°.
When the fugues show a sufficient stability it is common to drill the drilling holes horizontally.
Because of the injection with pressure and an expected greater radial spread of the injection agent around the drilling hole pressure injections can be accomplished in a single-row.
Deviations from these specifications are perhaps dependent on the process and/or object related. So the masonry cross section must be so designed that the injection material cannot drain off uncontrolledly. Where appropriate the masonry is to be pre-injected with a drilling hole suspension.
The drilling hole is set like this that at least one resp. two stock fugues are crossed or the stock fugue is drilled into when there is a horizontal workmanship of the drilling hole.
The drilling hole depth resp.length corresponds under consideration of the drilling hole angle to the about 5cm reduced wall thickness of the masonry profile.
To influence the capillary conductivity of a building material the injection materials are brought in with pressure over drilling holes into the masonry.
Depending on the structural conditions and the loading condition the subsequent horizontal sealings are always performed so far as and so far as it is possible at the bottom of the structure.
An absolute structure drainage is physically and technically not possible.
But through the injection procedure however the moisture content in the masonry can be lowered. The boundary for so called drainages is constituted by the respective equilibrium dampness, which itself is constituted by the sorption and the hygroscopicity of the construction materials.
A masonry can be called dry when its hygroscopic moisture penetration level, the so called masonry dampness at which the hygroscopic compensation dampness is reached, is present. For bringing up new plaster the moisture penetration of the masonry in the cross section must not exceed over 20%. For the application of refurbishing plaster this value can raised up to about 30%.
Sealing of an existing defective horizontal barrier from the exterior of the building.