Abstract: The invention relates to a system for monitoring a substratum (1) with regard to damage and/or for protecting a substratum (1) from damage. The system comprises: an electrolytically active layer (4), which has a moisture-dependent electrical resistance; at least one electrode pair, the spaced-apart electrodes (3a, 3b) of which are connected to each other by means of the electrolytically active layer (4); and a measuring device, by means of which a property, in particular an electrical quantity of the electrolytically active layer (4) or of the electrodes (3a, 3b), can be measured by using electrodes (3a, 3b) of at least one electrode pair, in particular of each electrode pair, and/or a control device, by means of which a voltage can be applied to the electrodes (3a, 3b) of at least one electrode pair, in particular of each electrode pair.

Abstract: The invention relates to a system for monitoring a substratum (1) with regard to damage and/or for protecting a substratum (1) from damage. The system comprises: an electrolytically active layer (4), which has a moisture-dependent electrical resistance; at least one electrode pair, the spaced-apart electrodes (3a, 3b) of which are connected to each other by means of the electrolytically active layer (4); and a measuring device, by means of which a property, in particular an electrical quantity of the electrolytically active layer (4) or of the electrodes (3a, 3b), can be measured by using electrodes (3a, 3b) of at least one electrode pair, in particular of each electrode pair, and/or a control device, by means of which a voltage can be applied to the electrodes (3a, 3b) of at least one electrode pair, in particular of each electrode pair.

Abstract: The invention relates to a method for determining the location of the corrosion sites in reinforced concrete, wherein a value (UB, UC) of a voltage potential (UB, UC) present at each measurement location is measured at at least two measurement locations relative to a reference voltage potential (UA) present at a reference location, and information about the direction to the corrosion site (K) and/or the distance to the corrosion site (K) is determined from the location information (XB, YB, XC, YC) for each measurement location, particularly also the reference location, and the voltage potential (UA, UB, UC) present at each location.

Abstract: The invention relates to a method for determining the location of the corrosion sites in reinforced concrete, wherein a value (UB, UC) of a voltage potential (UB, UC) present at each measurement location is measured at at least two measurement locations relative to a reference voltage potential (UA) present at a reference location, and information about the direction to the corrosion site (K) and/or the distance to the corrosion site (K) is determined from the location information (XB, YB, XC, YC) for each measurement location, particularly also the reference location, and the voltage potential (UA, UB, UC) present at each location.