Hydration of C3S in presence of CA: Mineral‐pore solution interaction

Journal article


Publication Details

Author(s): Nehring J, Jansen D, Neubauer J, Götz-Neunhoeffer F
Journal: Journal of the American Ceramic Society
Publication year: 2019
Volume: 102
Journal issue: 6
Pages range: 3152-3162
ISSN: 1551-2916


Abstract

C
3
S and CA are the main phases of OPC and Fe-rich CAC, respectively. The objective of this research was to investigate the influence of CA on C
3
S hydration, representing an under sulfated OPC-rich binder, and to shed light on the underlying hydration mechanisms. To this end, C
3
S was blended with 1-30 wt-% CA and the pastes (w/c 0.5) were investigated by heat flow calorimetry, in situ X-ray diffraction and analysis of the pore solution chemistry. CA additions ≥5 wt-% reveal a separation into three distinct heat flow maxima, whereas additions ≤3 wt-% just retard the start of the main reaction. The silicate reaction (dissolution of C
3
S and precipitation of C–S–H with or without CH) can be retarded for 4 to ≥22 hours in comparison to pure C
3
S depending on the admixed CA content. The start of the silicate reaction seems to be related to a decrease in Al- and increase in Ca-concentration in the pore solution. However, it can be shown in this study that C
3
S is able to dissolve even at high Al concentrations in the pore solution.


FAU Authors / FAU Editors

Götz-Neunhoeffer, Friedlinde Prof. Dr.
Lehrstuhl für Mineralogie
Jansen, Daniel Dr.
Graduiertenzentrum der FAU
Nehring, Jörg
Lehrstuhl für Mineralogie
Neubauer, Jürgen apl. Prof. Dr.
Naturwissenschaftliche Fakultät


How to cite

APA:
Nehring, J., Jansen, D., Neubauer, J., & Götz-Neunhoeffer, F. (2019). Hydration of C3S in presence of CA: Mineral‐pore solution interaction. Journal of the American Ceramic Society, 102(6), 3152-3162. https://dx.doi.org/10.1111/jace.16197

MLA:
Nehring, Jörg, et al. "Hydration of C3S in presence of CA: Mineral‐pore solution interaction." Journal of the American Ceramic Society 102.6 (2019): 3152-3162.

BibTeX: 

Last updated on 2019-13-05 at 09:23