Evaluation of weathering-resistance classes in clastic rocks on the example of Polish sandstones |
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| Authors: | Malgorzata Labus |
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| Institution: | (1) Institute of Applied Geology, Silesian Technical University, Akademicka 2, 44-100 Gliwice, Poland |
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| Abstract: | The scope of the paper is an attempt at the identification of the weathering-resistance classes within clastic rocks by means
of analysis of capillary pressure saturation curves. The porosimetric parameters corresponding to the cementing character
and the grains’ mineralogical content are very important features of stone building materials, because of the weathering processes.
The analysed rocks were Polish sandstones and muddy sandstones used for building purposes, collected from different geological
units of Poland (i.e. Sudety Mts. Carpathian Mts. and Holy Cross Mts.) The results indicate the usefulness of sandstone materials
for building purposes. They could also be used in conservation procedures and for the reconstruction of existing buildings
and monuments. Basing on the parameterisation, with the van Genuchten function, of cumulative capillary pressure saturation
curves, it was possible to distinguish four groups of the sampled rocks. The lithological features and weathering sustainability
within the groups are quite uniform, what allow identifying the weathering resistance classes. Taking into account the complicated
nature of all the factors influencing weathering processes, it is supposed that the presented parameterisation could be a
useful tool for weathering-resistance classification of clastic rocks. The classification could be useful in building industry
and in conservation of historical stone monuments. |
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| Keywords: | Porosity Sandstones van Genuchten function Weathering resistance |
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