Quantitative in-situ X-ray diffraction analysis of early hydration of Portland cement at defined temperatures

Beitrag in einer Fachzeitschrift


Details zur Publikation

Autorinnen und Autoren: Götz-Neunhoeffer F, Neubauer J, Hesse C, Gäberlein P, Bräu M
Zeitschrift: Powder Diffraction
Verlag: Cambridge University Press (CUP)
Jahr der Veröffentlichung: 2009
Band: 24
Heftnummer: 2
Seitenbereich: 112-115
ISSN: 0885-7156
Sprache: Englisch


Abstract


Investigation into the early hydration of Portland cement was performed by in situ X-ray diffraction (XRD). Technical white cement was used for the XRD analysis on a D5000 diffractometer (Siemens). All diffraction patterns of the in situ measurement which were recorded up to 22 h of hydration at defined temperatures were analyzed by Rietveld refinement. The resulting phase composition was transformed with respect to free water and C-S-H leading to the total composition of the cement paste. The hydration reactions can be observed by dissolution of clinker phases as well as by the formation of the hydrate phases ettringite and portlandite. With increasing temperatures the reactions proceed faster. The formation of ettringite is directly influenced by the rate of dissolution of anhydrite and tricalcium aluminate (C3 A). The beginning of the main period of hydration is marked by the start of portlandite formation. The experiments point out that a quantitative phase analysis of the cement hydration is feasible with standard laboratory diffractometers. © 2009 International Centre for Diffraction Data.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Götz-Neunhoeffer, Friedlinde Prof. Dr.
Lehrstuhl für Mineralogie
Neubauer, Jürgen apl. Prof. Dr.
Lehrstuhl für Mineralogie


Einrichtungen weiterer Autorinnen und Autoren

BASF Construction Solutions GmbH


Zitierweisen

APA:
Götz-Neunhoeffer, F., Neubauer, J., Hesse, C., Gäberlein, P., & Bräu, M. (2009). Quantitative in-situ X-ray diffraction analysis of early hydration of Portland cement at defined temperatures. Powder Diffraction, 24(2), 112-115. https://dx.doi.org/10.1154/1.3120603

MLA:
Götz-Neunhoeffer, Friedlinde, et al. "Quantitative in-situ X-ray diffraction analysis of early hydration of Portland cement at defined temperatures." Powder Diffraction 24.2 (2009): 112-115.

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