Engineering Mechanics

Proceedings Vol. 21 (2015)

ENGINEERING MECHANICS 2015

Copyright © 2015 Institute of Theoretical and Applied Mechanics, Academy of Sciences of the Czech Republic, v.v.i., Prague

 

K. Kovářová
pages 152 - 153, full text

During their “life” sandstones are influenced by actions of weathering processes which usually lead to changes in their internal structure. Porosity and the character of pore space is one of the main factors affecting the resistance to weathering processes and, consequently, to the changes of mechanical-physical properties of these stones. Rock material is generally negatively influenced especially during the winter period. The effect of salt crystals and ice formation depends on the character of pore space, including the pore size distribution. Our research was focused on three commonly used Czech Cretaceous sandstones – Ho!ice, Bo"anov and Kocbe!e. These stones were exposed to the accelerated durability test and then the change of uniaxial compressive strength was determined. We used the mercury porosimetry and X-Ray microtomography methods to evaluate the changes of pore space properties. Use of these methods enabled more detailed understanding of the processes inside the stone structure and their influence on strength characteristics of sandstones.

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