TY - JOUR A1 - Haist, M. A1 - Link, J. A1 - Nicia, D. A1 - Leinitz, Sarah A1 - Baumert, C. A1 - von Bronk, T. A1 - Cotardo, D. A1 - Eslami Pirharati, M. A1 - Fataei, S. A1 - Garrecht, H. A1 - Gehlen, C. A1 - Hauschildt, I. A1 - Ivanova, I. A1 - Jesinghausen, S. A1 - Klein, C. A1 - Krauss, H.-W. A1 - Lohaus, L. A1 - Lowke, D. A1 - Mazanec, O. A1 - Pawelczyk, S. A1 - Pott, U. A1 - Radebe, N. W. A1 - Riedmiller, J. J. A1 - Schmid, H.-J. A1 - Schmidt, Wolfram A1 - Secrieru, E. A1 - Stephan, D. A1 - Thiedeitz, M. A1 - Wilhelm, M. A1 - Mechtcherine, V. T1 - Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries N2 - This paper presents the results of an interlaboratory study of the rheological properties of cement paste and ultrasound gel as reference substance. The goal was to quantify the comparability and reproducibility of measurements of the Bingham parameters yield stress and plastic viscosity when measured on one specific paste composition and one particular ultrasound gel in different laboratories using different rheometers and measurement geometries. The procedures for both in preparing the cement paste and carrying out the rheological measurements on cement paste and ultrasound gel were carefully defined for all of the study’s participants. Different conversion schemes for comparing the results obtained with the different measurement setups are presented here and critically discussed. The procedure proposed in this paper ensured a reasonable comparability of the results with a coefficient of variation for the yield stress of 27% and for the plastic viscosity of 24%, despite the individual measurement series’ having been performed in different labs with different rheometers and measurement geometries. KW - Rheometry KW - Rheology KW - Interlaboratory test KW - Test setup KW - Testing procedure KW - Cement paste KW - Ultrasound gel PY - 2020 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:b43-511220 SN - 1871-6873 VL - 53 IS - 4 SP - 92 PB - Rilem AN - OPUS4-51122 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brecht, Katja A1 - Pistol, Klaus A1 - Klemmstein, Frank A1 - Rogge, Andreas T1 - Novel test setup for the quantification of the size effect in spalling tests N2 - Within a current research project which is funded by the German Research Foundation (DFG) the influence of the size and the geometry of specimens on the spalling result in fire tests is going to be investigated at Bundesanstalt für Materialforschung und -prüfung (BAM). This paper describes some preliminary results and a newly developed test setup. The novel setup enables the efficient and precise quantification of spalling by using a special photogrammetric measurement system. T2 - 5th International Workshop on Concrete Spalling CY - Boras, Sweden DA - 12.10.2017 KW - Size effect KW - Test setup KW - Photogrammetry PY - 2017 SN - 0284-5172 SP - 281 EP - 287 AN - OPUS4-42529 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Brecht, Katja A1 - Pistol, Klaus A1 - Klemmstein, Frank A1 - Rogge, Andreas T1 - Novel test setup for the quantification of the size effect in spalling tests N2 - Within a current research project which is funded by the German Research Foundation (DFG) the influence of the size and the geometry of specimens on the spalling result in fire tests is going to be investigated at Bundesanstalt für Materialforschung und -prüfung (BAM). This paper describes some preliminary results and a newly developed test setup. The novel setup enables the efficient and precise quantification of spalling by using a special photogrammetric measurement system. T2 - 5th International Workshop on Concrete Spalling CY - Boras, Sweden DA - 12.10.2017 KW - Size effect KW - Test setup KW - Photogrammetry PY - 2017 AN - OPUS4-42530 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -