Thermal Treatment Of Moisture
Damaged Construction
Author(s)
J. Dreyer
Abstract
The reason for the destruction of stones and elements of construction is the
moisture which penetrates into the pores and destabilizes through several
processes, the matrix of the construction material in the case of the moisture
content of the materials is too high. The moisture content is a result of the
moistening and drying processes. The frequency and quantity of this process
determines the amount of moisture in a construction element. If this balance is
changed, for example by increased evaporation, the moisture load will be lower
and the moisture state of the construction eventually becomes harmless.
In this paper the results of investigations will be presented by using a
heating system in exterior and partition walls which suffer from arising moisture.
The temperature of these elements increases by only a few degrees, about the
temperature level of the environment to support the evaporation.
The findings of this investigation are the temperature influences on capillary
suction strength, viscosity, evaporation and so on. It is clear that in the case of
high moisture load and low evaporation the drying effect by thermal treatment is
low and in the opposite case this method will be very successful. The aim of this
investigation is to find out and show the possibilities of this method, the
boundary conditions of the application and the efficiency of this method.
The result of the investigations is quantification of the influence of the
material properties and the moisture load from subsoil and soil water on the
humidification. The method is relatively successful in the case of sandstone,
limestone, lime sandstone, and gas aerated concrete. For elements made of bricks
this method cannot be recommended.
Keywords: moisture damage, arising moisture, retrofitting of damaged
construction, thermal treatment.
Keywords
moisture damage, arising moisture, retrofitting of damaged
construction, thermal treatment.
Related Book
Other papers in this volume
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