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

Journal article
(Original article)


Publication Details

Author(s): Ectors D, Götz-Neunhoeffer F, Hergeth WD, Dietrich U, Neubauer J
Journal: Cement and Concrete Research
Publisher: Elsevier Ltd
Publication year: 2016
Volume: 79
Pages range: 366-372
ISSN: 0008-8846
Language: English


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 Authors / FAU Editors

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


External institutions
Wacker Chemie AG


How to cite

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.

BibTeX: 

Last updated on 2018-18-11 at 13:50