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

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).