In situ 1H-TD-NMR: Quantification and microstructure development during the early hydration of alite and OPC

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autorinnen und Autoren: Ectors D, Götz-Neunhoeffer F, Hergeth WD, Dietrich U, Neubauer J
Zeitschrift: Cement and Concrete Research
Verlag: Elsevier Ltd
Jahr der Veröffentlichung: 2016
Band: 79
Seitenbereich: 366-372
ISSN: 0008-8846
Sprache: Englisch


Abstract


An in situ framework for H time-domain nuclear magnetic resonance analysis was developed and applied on alite and OPC hydration. Highly time-resolved quantitative data on the evolution of proton reservoirs during hydration was collected for up to 40 h. Reservoirs could be clearly assigned to mobile (mix water), intermediate (C-S-H) and rigid fractions (CH, ettringite). Comparison of determined fraction quantities with data from in situ XRD measurements and heat flow calorimetry show very good agreement. During alite hydration at 23°C, a bulk water content of 4 HO in CSH was confirmed. T2 relaxation times of the mobile fraction shifted towards shorter times from the start of the main reaction until the maximum of the heat flow. Microstructure evolution is nearly finished at that point in time. T2 relaxation times are severely shortened for iron-containing OPC, but are still evaluable.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Ectors, Dominique
Lehrstuhl für Mineralogie
Götz-Neunhoeffer, Friedlinde Prof. Dr.
Naturwissenschaftliche Fakultät
Neubauer, Jürgen apl. Prof. Dr.
Naturwissenschaftliche Fakultät


Einrichtungen weiterer Autorinnen und Autoren

Wacker Chemie AG


Zitierweisen

APA:
Ectors, D., Götz-Neunhoeffer, F., Hergeth, W.D., Dietrich, U., & Neubauer, J. (2016). In situ 1H-TD-NMR: Quantification and microstructure development during the early hydration of alite and OPC. Cement and Concrete Research, 79, 366-372. https://dx.doi.org/10.1016/j.cemconres.2015.10.011

MLA:
Ectors, Dominique, et al. "In situ 1H-TD-NMR: Quantification and microstructure development during the early hydration of alite and OPC." Cement and Concrete Research 79 (2016): 366-372.

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Zuletzt aktualisiert 2018-18-11 um 13:50