摘要：Due to its numerous technical advantages as well as health
benefits, sand-lime brick is increasingly used in the construction of brick
walls, especially in residential buildings. Unfortunately, the occurrence of
damp leads to a sharp deterioration of the technical properties of the
material and the environmental conditions inside the building. Given the
importance of this issue, an attempt was made to diagnose the extent of
dampness variability of the main hygrothermal and strength characteristics
of calcium silicate products. The study involved the basic material
properties (density in dry and water-saturated conditions), moisture-related
properties (capillary adsorption coefficient and sorptivity), thermal
coefficients (thermal conductivity and volumetric heat capacity) as well as
mechanical properties (compressive strength). This article describes
diagnostic studies that were conducted to assess the extent of the effect of
dampness on the strength of sand-lime products. In order to render the
diagnosis more comprehensive and to include a wider range of silicate
blocks available on the market, it was decided to examine three groups of
silicate blocks (strength class 15, 20 and 25) obtained from three different
factories. It was demonstrated that for all the examined groups dampness
caused a significant decrease in compressive strength ranging from about
30% to about 40%.
其他摘要：Due to its numerous technical advantages as well as health benefits, sand-lime brick is increasingly used in the construction of brick walls, especially in residential buildings. Unfortunately, the occurrence of damp leads to a sharp deterioration of the technical properties of the material and the environmental conditions inside the building. Given the importance of this issue, an attempt was made to diagnose the extent of dampness variability of the main hygrothermal and strength characteristics of calcium silicate products. The study involved the basic material properties (density in dry and water-saturated conditions), moisture-related properties (capillary adsorption coefficient and sorptivity), thermal coefficients (thermal conductivity and volumetric heat capacity) as well as mechanical properties (compressive strength). This article describes diagnostic studies that were conducted to assess the extent of the effect of dampness on the strength of sand-lime products. In order to render the diagnosis more comprehensive and to include a wider range of silicate blocks available on the market, it was decided to examine three groups of silicate blocks (strength class 15, 20 and 25) obtained from three different factories. It was demonstrated that for all the examined groups dampness caused a significant decrease in compressive strength ranging from about 30% to about 40%.
