ABSTRACT
These characteristics are well-known, including their share in the safety of historic buildings; for example:
(a) the masonry structural sub-units: – are rigid to gravitational actions, if these lead to
compression and if due to these no differential settlements are produced;
– have minimum reserves for taking over the tension, thus they are very sensitive to dynamic actions;
– are sensitive to climatic actions, moisture, freezing cycles etc.;
– are sensitive to natural or artificial corrosion factors;
– the fatigue, the seismic energy-absorption of the masonry mortars and the consequences due to corrosion can be tested in the mass of the masonries with difficulty, the evaluation of their state parameters being possible only in quality.
