Preservation of Plastered Facades of Buildings

The facades and especially the socles of buildings are one of the most important constructions, as they take the load of the entire building. In this regard, the safety of the socle structure is an important task. However, in the process of exploitation, the socle of the building is constantly moistened by precipitation, in this connection the material of construction of the socle is in moisture saturation state. For the predominant number of buildings built in the past and earlier centuries, the basement of the building was made of brickwork. It is noted that when using the cement-sand plaster as a plaster layer under conditions of active humidification the destruction of both the material of plaster and brick material takes place, which leads to a weakening of the bearing capacity of the plinth of buildings. When using lime-sand plaster, only the plaster layer is destroyed, the brick is not destroyed. This phenomenon is explained by the author on the basis of the conditions of the process of chemical destruction at the boundary of materials. To eliminate the destruction process, the structural solution with the use of the so- called moisture cutout is proposed. Selection of materials for effective use of the moisture cutout and elimination of the destruction of the socle is recommended taking into account the permeability criterion. The use of a moisture cutout with the correct selection of materials of the plaster layer will not only preserve the strength of the structure of the socle, but also reduce the heat loss of the building through the enclosing structures due to reducing their humidity.

D.Yu. ZHELDAKOV, Candidate of Sciences (Engineering) (This email address is being protected from spambots. You need JavaScript enabled to view it.)

Research Institute of Building Physics Russian Academy of architecture and construction sciences (21, Lokomotivniy Driveway, Moscow, 127238, Russian Federation)

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