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The effect of moisture on the surface strength of sandstone rock outcrops
Fraňková, Kateřina-Alexandra ; Weiss, Tomáš (advisor) ; Bruthans, Jiří (referee)
The aim of the thesis is to evaluate the influence of moisture on the tensile strength of sandstone rock outcrops and also to evaluate the possible influence of man on the erosion of sandstone rocks, especially by climbing activities, by means of a research study and specific examples from my own and non-own researches. Just a few studies have so far addressed the effect of moisture on the tensile strength of sandstone, and although the results of these studies generally suggest that the tensile strength of sandstone rock outcrops decreases with increasing moisture, there are differences depending on the specifics of the selected study areas. It would therefore be interesting to do a study that names and evaluates the possible aspects influencing this dependence. In my thesis I have evaluated studies carried out using different methodologies, which are described in a separate chapter. The results of the studies show that the tensile strength does indeed decrease with increasing moisture content, but the degree of decrease depends mainly on the mineralogical composition of the rock. The tensile strength of rocks with a high clay or organic content will decrease significantly more with increasing moisture than the tensile strength of rocks with a high quartz content. I have also reviewed several...

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