Publisher © Czech Geological Survey, ISSN: 2336-5757 (online), 0514-8057 (print)

Physical parametres of Turonian marly silicites and their relationship to the mineral composition


Jan Šrámek

Geoscience Research Reports 38, 2005 (GRR for 2004), pages 147–149

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Physical properties of marly silicites are highly influenced by each other, e.g. the compression strength, porosity, soaking capacity or density of rock as well as by the mineral composition. Mutual correlation and regression analyses of two sets showed that each per cent increase of porosity leads to a decrease of the dried sample compression strength for 4.4 or 1.7 MPa respectively, each one per cent increase of soaking capacity leads to decrease of compression strength for 7.3 and 3.6 MPa respectively. Each one per cent increase of the Si02 mineral modifications makes compression strength increase for about 4.5-1.3 MPa respectively. However, the same one per cent increases of calcite content lowers compression strength for about 4.2-0.5 MPa respectively. The influence of clay and mica minerals on strength was not significant. Correlation and regression equations among the main physical parameters can be used in many practice fields.