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Masonry drainingMasonry kiln laying is a very important component in the renovation of old buildings. This refers to the draining and desalination of components.
Furthermore, masonry drainage is used to eliminate moisture damage, with various methods.
Which method of masonry drying is used depends on several factors. The framework conditions of the buildings, the pros and cons of the different procedures as well as the aspects of the costs have to be considered.
The different methods of masonry drying
A distinction is made between: electro-physical processes, the horizontal cutting process as well as the injection process, the wall replacement and the Ramm-Riffelblechverfahren. In the electro-physical method, applying a DC electrical voltage via electrodes. Thus, the moisture acting as an electrolyte should be lowered in the masonry.
From a technical point of view electrodeless electroosmosis based on oscillating circuits or electromagnetic fields is very controversial. An advantage of this method is that the masonry must be intervened only slightly.
Thus, this method can be used quite easily in different buildings. The disadvantage here is that the effectiveness of this method has not yet been scientifically proven. Furthermore, extensive preliminary analyzes are required, which in addition to a high workload also bring high costs.
More interesting is the horizontal cutting process, in which a horizontal saw is brought into the masonry with a sword saw or a wire saw. The cuts are then filled with a sheet or foil and then provide a moisture barrier of 100 percent.
The disadvantage is
in the horizontal section method, that a high workload is given, which also drives the costs in the air. Furthermore, it can lead to static problems, which is the case especially in vaults.
Another option for masonry drying is the injection method. Here, in a very specific arrangement boreholes are introduced into the masonry. These are filled without pressure or via pressure injection with certain injection materials. Injectables are water-soluble or solvent-borne bitumen and paraffin products in question.
The effort in this process is quite low and therefore too
the costs. Also with regard to static aspects, this method for masonry drying is considered low cost. However, it is felt to be disadvantageous in the injection method that the durability of the respective injection materials can sometimes be difficult to assess. This is primarily the case with a very high substrate moisture or if the masonry is heavily contaminated with salt.
The process of wall replacement is also known as wall separation. Here, a part of the old masonry is demolished and replaced by a newly created masonry or concrete. In practice, this method is usually implemented by overlapping core drillings.
The materials that are considered for the actual blocking are different. An advantage of this method is that the implementation as well as the quality of the method can be easily checked. Furthermore, the wall parts are immediately removed when the wall is replaced, which are salt laden. The disadvantage of this variant is that in addition to a very high workload and a high cost factor is given. In addition, this method is extremely time-consuming and in the area of vaults can lead to static problems.
If the masonry is quarry stone, this method can not be performed at all.
When Ramm-Riffelblechverfahren a corrugated sheet is mechanically introduced into a continuous storage joint. It acts at the time of construction a very high horizontal load on the masonry. This variant is possible with a masonry of up to 80 centimeters. For walls with a higher thickness, there is an excessive burden on the sheets and masonry.
Conclusion of the methods for masonry drying
With damp walls, mold and the health consequences, not to mention the damage to the building fabric, you do not have to be satisfied. It
There are different methods for different starting situations. The advice of a professional, which variant is most likely to be used, but should necessarily be obtained.