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Calorimetry

In page navigation: Applied Mineralogy
  • Staff
    • Prof. Dr. Matthias Göbbels
    • Prof. Dr. Friedlinde Götz-Neunhoeffer
    • Prof. Dr. Jürgen Neubauer
    • Dr. rer. nat. Katrin Hurle
    • Dr. rer. nat. Daniel Jansen
    • M. Sc. Franz Becker
    • M.Sc. Nicholas Fobbe
    • M.Sc. Julian Goergens
    • M.Sc. Cordula Jakob
    • M. Sc. Irina Kirchberger
    • M.Sc. Andreas Köhler
    • M.Sc. Anika Mielkau
    • M. Sc. Jakob Schreiber
    • M. Sc. Pauline Rost
    • M.Sc. Karla Späth
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    • Dipl.-Ing. (FH) Christian Abe
    • M.Sc. Sophia Villmow
    • Bettina Engl
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    • Dr. rer. nat. Florian Hüller
    • Dr. rer. nat. Christoph Naber
    • Dr. rer. nat. Jürgen Schreiner
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    • Dr. rer. nat. Jörg Nehring
    • Dr. rer. nat. Julian Johannes Wolf
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Calorimetry

Calorimetry

Heat flow curve of a commercial Portland cement

Isothermal calorimetry is a useful tool for the time-resolved investigation of cement hydration. The temperature change in the sample induced by endothermic or exothermic reactions is transferred into a heat flow signal. This allows investigation of e.g. the retarding or accelerating effect of additives.

The Erlangen Applied Mineralogy Group operates three commercial TAM Air isothermal calorimeters with eight twin-type channels, each consisting of a measurement and a reference cell.

TAM Air isothermal calorimeter with eigth twin type channels (TA Instruments)

Special tools were developed for internal stirring (InMixEr – Injection & mixing device for internal paste preparation, FAU Erlangen, Mineralogy). Here, injection of the mixing liquid and stirring of the cement paste is performed directly in the measurement channel, whereas tools containing four syringes further allow the simultaneous addition of different mixing liquids. By this means, reliable calorimetry data can be obtained even for the initial part of cement reactions.

InMixEr tool for internal stirring
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