caa a22 4500 475827309 CHVBK 20180406123832.0 cr unu---uuuuu 170329e20000601xx s 000 0 eng 10.1007/s005310050324 doi (NATIONALLICENCE)springer-10.1007/s005310050324 Physical weathering of marbles caused by anisotropic thermal expansion [Elektronische Daten] [S. Siegesmund, K. Ullemeyer, T. Weiss, E. K. Tschegg]  Marbles as building stones as well as in their natural environments show complex weathering phenomena. The most important damage scenario is based on the highly anisotropic thermal expansion coefficient α of calcite, i.e. extreme expansion parallel and contraction normal to the crystallographic c-axis. Therefore, the rock fabric and especially the lattice-preferred orientation (texture) of calcite and/or dolomite as the predominant mineral phases in marbles have a significant influence on the mechanical weathering. The textures of marbles from five different locations vary from a more or less perfect prolate to moderate oblate shape of the [006] pole figure tensor. Accordingly, the texture-derived bulk thermal dilatation anisotropy covers a broad range from -0.048 to 0.680. The modelled thermal dilatations correlate with those obtained from experimental measurements. The difference in magnitude is basically explained by the microcrack fabrics which was not considered in the computations. All samples show a deterioration due to thermal treatment regardless of the strength of texture. The directional dependence of (a) the total magnitude of the thermal dilatation coefficient and (b) of the residual strain is highest in marbles with a strong texture, whereas the Carrara marble with a weak texture exhibits a uniform crack formation. The progressive loss of cohesion along grain boundaries due to dilatancy may serve as an example for the initial stage of physical weathering. Springer-Verlag Berlin Heidelberg, 2000 Key words Marble nationallicence Building stone nationallicence Physical weathering nationallicence Thermal dilatation nationallicence Rock fabrics nationallicence Lattice preferred orientation nationallicence Siegesmund S. Institut für Geologie und Dynamik der Lithosphäre, Goldschmidtstrasse 3, D-37077 Göttingen, Germany e-mail: ssieges@gwdg.de Tel.: +0551-397929 Fax: +0551-399700, DE aut Ullemeyer K. Institut für Geologie und Dynamik der Lithosphäre, Goldschmidtstrasse 3, D-37077 Göttingen, Germany e-mail: ssieges@gwdg.de Tel.: +0551-397929 Fax: +0551-399700, DE aut Weiss T. Institut für Geologie und Dynamik der Lithosphäre, Goldschmidtstrasse 3, D-37077 Göttingen, Germany e-mail: ssieges@gwdg.de Tel.: +0551-397929 Fax: +0551-399700, DE aut Tschegg E. K. Institut für Angewandte und Technische Physik der TU Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria, AT aut https://doi.org/10.1007/s005310050324 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s005310050324 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Siegesmund S. Institut für Geologie und Dynamik der Lithosphäre, Goldschmidtstrasse 3, D-37077 Göttingen, Germany e-mail: ssieges@gwdg.de Tel.: +0551-397929 Fax: +0551-399700, DE aut NATIONALLICENCE 700 1- Ullemeyer K. Institut für Geologie und Dynamik der Lithosphäre, Goldschmidtstrasse 3, D-37077 Göttingen, Germany e-mail: ssieges@gwdg.de Tel.: +0551-397929 Fax: +0551-399700, DE aut NATIONALLICENCE 700 1- Weiss T. Institut für Geologie und Dynamik der Lithosphäre, Goldschmidtstrasse 3, D-37077 Göttingen, Germany e-mail: ssieges@gwdg.de Tel.: +0551-397929 Fax: +0551-399700, DE aut NATIONALLICENCE 700 1- Tschegg E. K. Institut für Angewandte und Technische Physik der TU Wien, Wiedner Hauptstrasse 8-10, A-1040 Vienna, Austria, AT aut Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer