Abstract
The essential function of exterior walls is to provide a continuous barrier to the exterior environmental conditions. The decay of the building facades is accelerated by atmospheric pollution and acidic precipitation. For determining of the impact of atmospheric pollution on the building facade face materials, the tests examining the impact of the cyclic moisturing‐drying have been carried out with the use of acidic water solution to imitate acidic rain. The results of the experiments demonstrated that water solutions have greater destructive effects on the paint film by penetrating through it into the plaster base, thus forming new derivatives in it, which increase water absorption in the plaster base. In order to improve the standard testing on weather resistance of facing building materials, which does not ignore the impact of the atmospheric pollution, for localities where acidic precipitations are frequent, the climatic tests should also include the deteriorating effect of acidic water solutions on facing materials. The results of the experiments will be used for a creation of the prognostic method which will lead to the establishment of a new accelerated climatic ageing test cycle meant for determining a more reliable prognosis of the durability of materials.
Highlights
This article reviews important issues in assessing the durability of rendered facade walls, focusing on the interrelation between experience, testing and modelling
The need for a prognosis of the building facade facing durability in the estimation of climatic factors came into focus with the increase of the building material variety
In the climatic ageing investigations, an attempt was made to imitate a greater number of climatic factors, seeking to make the laboratory climatic tests more similar to the natural climatic factors that operate in natural environment, at the same time forecasting the real durability of the material more precisely
Summary
This article reviews important issues in assessing the durability of rendered facade walls, focusing on the interrelation between experience, testing and modelling. In the climatic ageing investigations, an attempt was made to imitate a greater number of climatic factors, seeking to make the laboratory climatic tests more similar to the natural climatic factors that operate in natural environment, at the same time forecasting the real durability of the material more precisely It was found during field observations of building facades that deterioration of their surfaces is being accelerated by air pollution [57], which is a significant climatic factor, increasing the rapid ageing of buildings, especially the historical ones and monuments. The research aims at the creation of the method for investigating of the building facing materials that would allow for a more precise imitation of climatic factors, including atmospheric pollution, which has not yet been considered in the climatic tests in Lithuania
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