Impact of initial CA dissolution on the hydration mechanism of CAC

Journal article
(Original article)


Publication Details

Author(s): Hüller F, Naber C, Neubauer J, Götz-Neunhoeffer F
Journal: Cement and Concrete Research
Publisher: Elsevier Ltd
Publication year: 2018
Volume: 113
Pages range: 41-54
ISSN: 0008-8846


Abstract

Usually, for basic investigations on the hydration behaviour of CA (monocalcium aluminate, CaAl2O4) preferably pure samples without the presence of other hydraulic phases are used. In the presented study we apply an alternative approach investigating mixes that contain tiny to low amounts of CA (0.5–20 wt%) besides CA2 (CaAl4O7) or C6AF2 (Ca6Al2Fe4O15). The hydration of the mixes is investigated by isothermal heat flow calorimetry, in-situ XRD and pore solution analysis at 23 °C. A modified thermodynamic database enables the calculation of saturation indices for relevant hydrate phases in the investigated systems. CA similarly influences the hydration of both CA2 and C6AF2 although the exact impact strongly depends on the initial CA/water ratio in the mixes. Up to a certain amount CA is completely consumed during the first minutes after mixing. Beyond this amount the presence of undissolved CA causes an induction period and retards the hydration of CA2 or C6AF2.


FAU Authors / FAU Editors

Götz-Neunhoeffer, Friedlinde Prof. Dr.
Lehrstuhl für Mineralogie
Hüller, Florian
Lehrstuhl für Mineralogie
Naber, Christoph
Lehrstuhl für Mineralogie
Neubauer, Jürgen apl. Prof. Dr.
Naturwissenschaftliche Fakultät


How to cite

APA:
Hüller, F., Naber, C., Neubauer, J., & Götz-Neunhoeffer, F. (2018). Impact of initial CA dissolution on the hydration mechanism of CAC. Cement and Concrete Research, 113, 41-54. https://dx.doi.org/10.1016/j.cemconres.2018.06.004

MLA:
Hüller, Florian, et al. "Impact of initial CA dissolution on the hydration mechanism of CAC." Cement and Concrete Research 113 (2018): 41-54.

BibTeX: 

Last updated on 2019-07-01 at 10:38

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