VERFAHREN UND VORRICHTUNG ZUR DICHTHEITSPRÜFUNG VON BAUWERKSABDICHTUNGEN

摘要

- 40 - AbstractThe invention relates to a method for determining damaged or faulty points, in particular weak points with a reduced5 material thickness in a membrane-type, electrically non conductive or only poorly conductive structural seal (3) having a high electrical disruptive strength in comparison toair, said seal is provided with an electrically conductive layer (6) arranged inside or outside the structural seal (3)10 and 'extends over substantially the entire surface of the structural seal and to which layer an electrical test voltageis applied. To establish said damaged, faulty and/or weak points, a further electrically conductive layer (7) is used, which is electrically separated from the aforementioned15 electrically conductive layer (6) by the structural seal and extends over substantially the entire surface of thestructural seal. The level of the test voltage between the electrically conductive layers (6, 7) charged with voltage is selected such that when at least one electrically non 20 conductive damaged, faulty and/or weak point is present in the structural seal, the electrical disruptive strength isexceeded and an electric spark or arc being formed at the location of the damaged, faulty and/or weak point, wherein the test voltage being selected to be smaller than a destructive25 test voltage at which an electrical breakdown would result in an undamaged and/or un-weakened structural seal corresponding to the structural seal (3) to be tested, thereby forming an .electric spark ore arc. Also claimed is a correspondingly designed structural seal (3).30