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.
Goals of working group rheometry
© DFG-SPP-2005

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
  • Nonkoluleko 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
Insitutions of working group rheometry

Actions

Date

Action

Location

06.2018

Group meeting

Karlsruhe

12.2018

Group meeting

Frankfurt

02.2019

Group meeting

Berlin

05.2019

Group meeting

Hannover

10.2019

Group webmeeting

Webconference

12.2019

Group webmeeting

Webconference

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.

Development of generalised data conversion
© DFG-SPP-2005

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