Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements

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ORIGINAL ARTICLE

Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries Michael Haist . Julian Link . David Nicia . Sarah Leinitz . Christian Baumert . Tabea von Bronk . Dario Cotardo . Mahmoud Eslami Pirharati . Shirin Fataei . Harald Garrecht . Christoph Gehlen . Inga Hauschildt . Irina Ivanova . Steffen Jesinghausen . Christopher Klein . Hans-W. Krauss . Ludger Lohaus . Dirk Lowke . Oliver Mazanec . Sebastian Pawelczyk . Ursula Pott . Nonkululeko W. Radebe . Joachim Ju¨rgen Riedmiller . Hans-Joachim Schmid . Wolfram Schmidt . Egor Secrieru . Dietmar Stephan . Mareike Thiedeitz . Manfred Wilhelm . Viktor Mechtcherine Received: 9 January 2020 / Accepted: 4 April 2020  The Author(s) 2020

Abstract 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

M. Haist (&)  J. Link  T. von Bronk  D. Cotardo  L. Lohaus Institute for Building Materials Science, Leibniz University Hannover, 30167 Hannover, Germany e-mail: [email protected]

C. Baumert  H. Garrecht Institute of Construction Materials, University of Stuttgart, 70569 Stuttgart, Germany

M. Haist  J. Link Until 01/2019: Institute of Concrete Structures and Building Materials, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany D. Nicia  M. Eslami Pirharati  H.-W. Krauss  D. Lowke Institute of Building Materials, Concrete Construction and Fire Safety, Technische Universita¨t Braunschweig, 38106 Braunschweig, Germany S. Leinitz  W. Schmidt Bundesanstalt fu¨r Materialforschung und -pru¨fung (BAM), Division 7.4, Technology of Construction Materials, 12205 Berlin, Germany

S. Fataei  I. Ivanova  E. Secrieru  V. Mechtcherine Institute of Construction Materials, TU Dresden, 01062 Dresden, Germany C. Gehlen  M. Thiedeitz Centre for Building Materials, Technical University Munich, 81245 Munich, Germany I. Hauschildt HeidelbergCement AG, Oberklamweg 2-4, 69181 Leimen, Germany S. Jesinghausen  S. Pawelczyk  H.-J. Schmid Particle Technology Group, Paderborn University, 33098 Paderborn, Germany C. Klein  N. W. Radebe  M. Wilhelm Institute for Technical Chemistry and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), 76131 Karlsruhe, Germany

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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 pres