Abstract
Additional horizontal sealing in mineral building materials often produce insufficient or varying results despite the application of the injection agent being carried out according to the manufacturers’ specifications. There is no current scientific explanation for this effect, which prompted this research. The main idea was to solve the question of whether the increasing filling of the capillary pores of mineral building materials with water (and therefore the degree of moisture penetration) can be connected to the varying spread of the injection agent. After developing a test procedure, different degrees of moisture penetration were applied to samples of bricks and mortar cubes and hydrophobic injection agents were applied to the test specimens. The results showed that the degree of spreading of the injection agent was inversely proportional to the degree of moisture penetration. Consequently there is a dependence of the above mentioned parameters (the existing degree of moisture penetration and the spr...
Highlights
Damage to mostly historical buildings caused by moisture is still a worldwide problem
After developing a test procedure, different degrees of moisture penetration were applied to samples of bricks and mortar cubes and hydrophobic injection agents were applied to the test specimens
The results showed that the degree of spreading of the injection agent was inversely proportional to the degree of moisture penetration
Summary
Damage to mostly historical buildings caused by moisture is still a worldwide problem. The reason lies in the fact that there is no general transferability of important parameters as e.g. the borehole distance, as well as there being no consideration of the existing moisture degree of the masonry These facts caused the leading question of what the reasons for the obviously insufficient spreading of the injection agent are and the varying results of a subsequent horizontal sealing. Among other research activities, dealing with the computer-aided evaluation of transport mechanisms of salt and water in building materials [3], [4], the following considerations of the transport mechanism of an injection agent in building materials such as bricks and mortar served as a basis for the test procedure. A limited spread of the injection agent is to be expected
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