SPP 2005 Working Group Rheometry
Measuring the rheological properties of fresh building materials such as cement paste, mortar or concrete is a very challenging task. In contrast to many other substances, building materials consist of a very wide particle size distribution, with particles ranging from the sub-micron range to the double-digit millimeter range. In (standard) rheological measurements this results in the formation of slippage layers and segregation, which spoil the rheological measurement. Further, concrete, mortar and paste are chemically highly reactive systems, which leads to sometime pronounced problems in carrying out rheological measurements on such systems.
Goals
Working Group Rheometry in SPP 2005 addresses these questions by investigating and comparing the different measurement techniques available for cementitious systems. In detail WG Rheometry has the following goals:
- Provide a comparison and evaluation for the rheological measurement techniques available and used by the SPP members.
- Study of comparability of different rheological measurement geometries.
- Study in-situ measurement techniques, combining rheological and granulometrical/chemical measurements.
- Provide scale bridging quantified evaluations of rheology.
Members & Institutions
Chair
- Michael Haist
Leibniz University Hannover, Germany
Members
- Günter K. Auernhammer
Leibniz Institut für Polymerforschung Dresden e.V., Germany - Christian Baumert
University of Stuttgart, Germany - Tabea von Bronk
Leibniz University Hannover, Germany - Dario Cotardo
Leibniz University Hannover, Germany - Mahmoud Eslami Pirharati
Technische Universität Braunschweig, Germany - Shirin Fataei
Technische Universität Dresden, Germany - Inga Hauschild
HeidelbergCement AG, Germany - Irina Ivanova
Technische Universität Dresden, Germany - Steffen Jesinghausen
Paderborn University, Germany - Christopher Klein
Karlsruhe Institute of Technology (KIT), Germany - Hans-Werner Krauss
Technische Universität Braunschweig, Germany - Sarah Leinitz
Bundesanstalt für Materialforschung und –prüfung (BAM), Germany - Julian Link
Leibniz University Hannover, Germany - Dirk Lowke
Technische Universität Braunschweig, Germany - Oliver Mazanec
BASF Construction Solutions GmbH, Germany - Viktor Mechtcherine
Technische Universität Dresden, Germany - David Nicia
Technische Universität Braunschweig, Germany - Himanshu P. Patel
Leibniz Institut für Polymerforschung Dresden e.V., Germany - Sebastian Pawelczyk
Paderborn University, Germany - Ursula Pott
Technische Universität Berlin, Germany - Nonkululeko Radebe
Karlsruhe Institute of Technology (KIT), Germany - Hans-Joachim Schmid
Paderborn University, Germany - Wolfram Schmidt
Bundesanstalt für Materialforschung und –prüfung (BAM), Germany - Dietmar Stephan
Technische Universität Berlin, Germany - Mareike Thiedeitz
Technical University Munich, Germany - Manfred Wilhelm
Karlsruhe Institute of Technology (KIT), Germany
Actions
Date
Action
Location
June 2018
Group meeting
Karlsruhe
December 2018
Group meeting
Frankfurt
February 2019
Group meeting
Berlin
May 2019
Group meeting
Hannover
October 2019
Group webmeeting
Online
December 2019
Group webmeeting
Online
Results and Current Work
Major outcomes of the working group are two first benchmark test, which have been conducted for particle-based and continuum-based model approaches. The main goal of these benchmarks was to ensure, that the different implementation of the numerical models, which are used by the individual members of the working group, give the same results for well-specified problems. The results of these benchmarks have shown, that the data from all members are in very good agreement, although different numerical frameworks have been used. At moment, two new setups of benchmark problems are defined based on actual information from other working groups.
For detail see article:
Interlaboratory study on rheological properties of cement pastes and reference substances: comparability of measurements performed with different rheometers and measurement geometries
by Haist, Link, Nicia, Leinitz, Baumert, von Bronk, Cotardo, M. Eslami Pirharati, Fatei, Garrecht, Gehlen, Hauschildt, Ivanova, Jesinghausen, Klein, Krauss, Lohaus, Lowke, Mazanek, Pawelczyk, Pott, Radebe, Riedmiller, Schmid, Schmidt, Secrieru, Stephan, Thiedeitz, Wilhelm, Mechtcherine, Materials and Structures 53 (2020) 92
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