Ring-shear test data of feldspar sand FS900S used in the Tectonic Modelling Laboratory at the University of Bern (Switzerland)

Cite as:

Zwaan, Frank; Schreurs, Guido; Rudolf, Michael; Rosenau, Matthias (2022): Ring-shear test data of feldspar sand FS900S used in the Tectonic Modelling Laboratory at the University of Bern (Switzerland). GFZ Data Services. https://doi.org/10.5880/fidgeo.2022.008

Status

I N R E V I E W : Zwaan, Frank; Schreurs, Guido; Rudolf, Michael; Rosenau, Matthias (2022): Ring-shear test data of feldspar sand FS900S used in the Tectonic Modelling Laboratory at the University of Bern (Switzerland). GFZ Data Services. https://doi.org/10.5880/fidgeo.2022.008

Abstract

This dataset provides friction data from ring-shear tests on feldspar sand FS900S used for the simulation of brittle behaviour in crust- and lithosphere-scale analogue experiments at the Tectonic Modelling Laboratory of the University of Bern (Zwaan et al. in 2022, 2023; Richetti et al. 2023). The materials have been characterized by means of internal friction parameters as a remote service by the Helmholtz Laboratory for Tectonic Modelling (HelTec) at the GFZ German Research Centre for Geosciences in Potsdam (Germany). According to our analysis both materials show a Mohr-Coulomb behaviour characterized by a linear failure envelope. Peak, dynamic and reactivation friction coefficients of the feldspar sand are μP = 0.65, μD = 0.57, and μR = 0.62, respectively, and the Cohesion of the feldspar sand is in the order of 5-20 Pa. An insignificant rate-weakening of less than 1% per ten-fold rate change is registered for the feldspar sand. Granular healing is also minor.

Methods

The data presented here are produced ring shear testing using a SCHULZE RST-01.pc (Schulze, 1994, 2003, 2008) at the Helmholtz Laboratory for Tectonic Modelling (HelTec) of the GFZ German Research Centre for Geosciences in Potsdam. The RST is specially designed to measure friction parameters of bulk solids accurately at low confining pressures and shear velocities similar to analogue model (“sandbox”) experiments. In this tester, with shear cell of type “No. 1”, a sand layer is sheared internally at constant normal stress σN and shear velocity v while shear force and lid displacement (corresponding to volume change ΔV) are measured continuously. For more details see Klinkmüller et al. (2016) and Ritter et al. (2016).

Authors

Zwaan, Frank;Institute of Geological Sciences of the University of Bern, Switzerland
Schreurs, Guido;Institute of Geological Sciences of the University of Bern, Switzerland
Rudolf, Michael;GFZ German Research Centre for Geosciences, Potsdam, Germany;Technical University Darmstadt, Institute for Applied Geosciences - Engineering Geology, Darmstadt, Germany
Rosenau, Matthias;GFZ German Research Centre for Geosciences, Potsdam, Germany

Contact

Rosenau (Lab Manager); GFZ German Research Centre for Geosciences, Potsdam, Germany;

Contributors

Tectonic Modelling Laboratory at the Institute for Geological Sciences (TecLab Bern, Switzerland); HelTec - Helmholtz Laboratory for Tectonic Modelling (GFZ German Research Centre for Geosciences, Germany); Rosenau

Keywords

EPOS, multi-scale laboratories, analogue models of geologic processes, Friction, Material properties, property data of analogue modelling materials, analogue modelling results, software tools, Cohesion, Density, Friction coefficient, Python, Ring-shear tester, Sand > Feldspar Sand, Cohesion, Density, Friction coefficient, Python, Ring-shear tester, Sand > Feldspar Sand

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