MATHEMATICAL MODELLING OF PARAMETERS CONNECTED WITH MOISTURE IN BUILDINGS WALLS

In this paper we approach the capillary problems. The capillary phenomena work for the tubes with a diameter less than 2-3 mm. The capillary water is affected by the superficial pressure and that of the gravity field. The capillaries have irregular forms and dimensions in the foundation area. The water ascends in them, preferring the channels with smaller diameters and closing the air where the diameters are bigger. Because of the interaction forces between the water and the solid skeleton a tension state appears in the water from the pores, which, if we consider that the gravitational potential does not exist, is equal to the suction effect. We can deduce from there also the fact that the suction is the main factor that conditions the water migration through porous bodies only when the effect of the gravity potential can be ignored.