Influence of cellulose ethers on the kinetics of early Portland cement hydration [Elektronische Ressource] / von Ingo Müller

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Informations

• Publié par: westfalische_wilhelms-universitat_munster
• Publié le: 01 janvier 2007
• Nombre de lectures: 18
• Langue: English
• Poids de l'ouvrage: 8 Mo

Extrait

Ingo Müller
Influence of Cellulose Ethers on the Kinetics of
Early Portland Cement HydrationKarlsruher Mineralogische und Geochemische Hefte
Schriftenreihe des Instituts für Mineralogie und Geochemie,
Universität Karlsruhe (TH)
Band 32Influence of Cellulose Ethers
on the Kinetics of Early Portland
Cement Hydration
von
Ingo MüllerDissertation, Westfälische Wilhelms-Universität Münster
Mathematisch-Naturwissenschaftliche Fakultät, 2006
Anschrift des Autors:
Ingo Müller
Hercules GmbH
Paul-Thomas-Str. 56
D – 40599 Düsseldorf
Anschrift der Schriftleitung:
Karlsruher Mineralogische und Geochemische Hefte
Institut für Mineralogie und Geochemie
Universität Karlsruhe (TH)
D – 76128 Karlsruhe
Impressum
Universitätsverlag Karlsruhe
c/o Universitätsbibliothek
Straße am Forum 2
D-76131 Karlsruhe
www.uvka.de
Dieses Werk ist unter folgender Creative Commons-Lizenz
lizenziert: http://creativecommons.org/licenses/by-nc-nd/2.0/de/
Universitätsverlag Karlsruhe 2006
Print on Demand
ISSN: 1618-2677
ISBN-13: 978-3-86644-077-7
ISBN-10: 3-86644-077-4Acknowledgement
I'd like to thank Prof. Dr. Andrew Putnis, Inst. f. Min., Westf. Wilhelms-Universitaet
Muenster, and PD Dr. habil. Dirk Bosbach, Inst. f. Nukl. Ents. (INE), Forschungszentrum
Karlruhe, for giving me the great opportunity to graduate, for patiently reviewing this thesis
and for their helpful advices and discussions.
My special thanks are dedicated to Dr. John Bard, Dr. Dieter Schweizer and
Dr. Wilfried Hohn at Hercules Inc. for the kind permission to transform a Hercules research
project into a public PhD thesis. Without their essential support and endless patience this
project would not have been possible.
Many thanks to the very ambitious crews of the Swiss Light Source and the SINQ Neutron
Source at the Paul Scherrer Institut in Villigen, Switzerland. Especially I'd like to thank
Dr. Heinz Weyer, Dr. Bernd Schmitt and Dr. Bruce Patterson for their helpful company in
many sleepless nights at the Material Research Beamline. I'm very grateful for the help of
Dr. Peter Fischer and Dr. Denis Sheptyakov at the High Resolution Powder Diffractometry of
Thermal Neutrons. Many thanks to Dr. Fabia Gozzo and Dr. van der Veen who promised to
handcuff me to the heating system until I get the publications done.
I'd like to thank Angelika Breit and Dr. Ermrich for XRD analyses and software support and
Dr. Klaus Lipus at the VDZ for ESEM-FEG-images.
Many thanks to my colleagues, especially to Dr. Michael Dittel, Alexander Kindler, Stefan
Hucko and Wolfgang Hildebrandt for their help at the Hercules Construction Material
Laboratory in Duesseldorf. I'm particularly grateful for the associated apprenticeship of
Michael Zwanzig and his colleagues at the Heinrich-Hertz-Berufskolleg in Duesseldorf.
Last not least I'd like to thank my dear friends Annette Rolfes in Muenster and
Susanne Herppich in Zurich for their kind support and friendly hospitality. I always enjoyed
to take you out for dinner in times when I had to reconfigurate my mental hard disc drive.



A Note on Notation
Mutated vowels and pronounced s in German names are written in international notation
(ae, oe, ue, ss).

iContent
1. Abstract 1
2. Introduction 2
2.1 Subject 2
2.2 Objectives 2
2.3 Nomenclature 3
2.4 Historical Background 5
2.4.1 The Development of Cement 5
2.4.2 The Development of Cellulose Ethers 7
2.5 Materials 7
2.5.1 Portland Cement 7
2.5.2 Clinker and Cement Phases 8
2.5.3 Hydration Processes of Portland Cement 12
2.5.4 Cellulose Ethers 13
2.5.5 Macroscopic Effects of Cellulose Ethers on Dry Mortars 17
2.5.6 Dry Mortar Applications and their Economic Relevance 18
2.6 State of Research 20
3. Methods 24
3.1 Standard Wet Paste Preparation 24
3.2 Etrringite Pure Phase Synthesis 25
3.3 Particle Size Distribution (PSD) 25
3.4 Specific Surface Area 26
3.5 Helium Pycnometry 27
3.6 Ultrasonic Measurements 27
3.7 Heat Flux Calorimetry 28
3.8 Adsorption Tests and Size Exclusion Chromatography (SEC) 29
3.9 Powder Diffraction 33
3.9.1 Laboratory X-Ray Powder Diffraction 33
3.9.2 Synchrotron X-Ray Po34
3.9.3 Thermal Neutron Powder Diffraction 37
3.10 Environmental Scanning Electron Microscopy - Field Emission Gun (ESEM-FEG) 39
ii4. Material Characterization 40
4.1 Defined Portland Cement 40
4.2 Pure Mineral Phases 42
4.3 Cellulose Ethers 43
4.4 Cement and Pure Phase Admixtures 44
5. Results 46
5.1 The Adsorption of Cellulose Ethers on Cement Phases 46
5.2 The Retarding Effect of Cellulose Ethers on Early Portland Cement Hydration 53
5.2.1 Ultrasonic Measurements 53
5.2.2 Heat Flux Calorimetry 55
5.2.3 Laboratory XRD 59
5.2.4 Synchrotron XRD 66
5.2.5 Synchrotron XRD with Liquid Injection 73
5.2.6 Thermal Neutron Powder Diffraction 81
5.2.7 ESEM-FEG 83
6. Summary 89
6.1 Portland Cement Hydration without Cellulose Ether 89
6.2 CE-caused Retardation 91
6.3 CE-Adsorption 93
7. Discussion 95
7.1 Stepwise Ettringite Formation 95
7.2 Interactions of Cellulose Ethers with Cement 96
8. Outlook 98
Appendix 99
A.1 Figures 99
A.2 Abbreviations 104
A.3 References 106
A.4 Technical Equipment 109
A.5 Co-operations 110

iii