Der zementgebundene Kunststein der Löwenfiguren der Steinfabrik Zürich als technik- und materialgeschichtliches Zeitdokument des ausgehenden 19. Jahrhunderts

Petra, Dariz (2023). Der zementgebundene Kunststein der Löwenfiguren der Steinfabrik Zürich als technik- und materialgeschichtliches Zeitdokument des ausgehenden 19. Jahrhunderts Zeitschrift für Kunsttechnologie und Konservierung, 36(1), pp. 143-153. Wernersche Verlagsgesellschaft

Full text not available from this repository. (Request a copy)

The weathered surface of the artificial stone lions presented by the Steinfabrik Zürich at the cantonal industrial exhibition of 1894 in Zurich shows the phenomenon of hydrate-sphere formation. The contribution at hand tries to trace the causing production parameters in a combined evaluation of contemporary test results and recent microscopic as well as spectroscopic analyses of clinker remnants in the cement stone with historical practice-oriented instructions. The petrographic characteristics of the unhydrated clinker nodules indicate temperature gradients in the kiln charge at low heating rates and long retention times as a result of natural cooling of the cement clinker to ambient temperature, and thus a Portland cement fired in a shaft kiln. The early industrial specialist literature mentions a deliberate premature reaction of highly reactive clinker phases (calcium aluminate phases, free lime) due to hydration and carbonation through the controlled storage of Roman and Portland cement (clinker as well as cement) or the use of wet mineral aggregates; the specific mechanisms of the heterogeneous setting and formation of hydration centres, growing into spheres in the centimetre size range, provoked by the aging of the Portland cement binder prone to pre-hydration are still a desideratum of research today.

Item Type:	Journal Article (Original Article)
Division/Institute:	Bern Academy of the Arts Bern Academy of the Arts > Institute Materiality in Art and Culture Bern Academy of the Arts > Institute Materiality in Art and Culture > Technology in Art and Culture
Name:	Petra, Dariz
Subjects:	N Fine Arts > NB Sculpture Q Science > Q Science (General) T Technology > TH Building construction T Technology > TS Manufactures
ISSN:	0931-7198
Publisher:	Wernersche Verlagsgesellschaft
Language:	German
Submitter:	Petra Dariz
Date Deposited:	23 Oct 2023 11:43
Last Modified:	23 Oct 2023 11:43
Related URLs:	Publisher
Uncontrolled Keywords:	Kunststein Portlandzement Zementklinker Hydratkugeln Zürcher Gewerbeausstellung 1894
URI:	https://arbor.bfh.ch/id/eprint/20193