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


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
S hydration, representing an under sulfated OPC-rich binder, and to shed light on the underlying hydration mechanisms. To this end, C
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
S and precipitation of C–S–H with or without CH) can be retarded for 4 to ≥22 hours in comparison to pure C
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
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

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

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.


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