Controlling ettringite precipitation and rheological behavior in ordinary Portland cement paste by hydration control agent, temperature and mixing
Jakob C, Jansen D, Dengler J, Neubauer J (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 166
Pages Range: 107095
Article Number: 107095
DOI: 10.1016/j.cemconres.2023.107095
Abstract
The influence of ettringite precipitation on the rheological properties during the initial and the induction period of ordinary Portland cement (OPC) hydration is examined by combining quantitative X-ray diffraction (QXRD), thermogravimetry (TG), calorimetry, penetration test method and 1H-TD-NMR. This allows a good overview about mineralogical changes during hydration and conclusions about their effect on rheological and microstructural changes within the paste. The reaction kinetic are controlled either by varying curing temperature or by an organic additive, which allows adjustment of the initial aluminate reaction while delaying the silicate reaction for hours. A significant correlation of ettringite content and rheological behavior due to structural build-up of the paste is observed in all investigated systems. The potential influence of ettringite content on structural build-up of the paste is found to be comparable to the effect of solid volume fraction on rheology (viscosity & yield stress).
Authors with CRIS profile
Cordula Jakob
Lehrstuhl für Mineralogie
Daniel Jansen
Graduiertenzentrum der FAU
Jürgen Neubauer
Lehrstuhl für Mineralogie
Involved external institutions
Germany (DE)How to cite
APA:
Jakob, C., Jansen, D., Dengler, J., & Neubauer, J. (2023). Controlling ettringite precipitation and rheological behavior in ordinary Portland cement paste by hydration control agent, temperature and mixing. Cement and Concrete Research, 166, 107095. https://dx.doi.org/10.1016/j.cemconres.2023.107095
MLA:
Jakob, Cordula, et al. "Controlling ettringite precipitation and rheological behavior in ordinary Portland cement paste by hydration control agent, temperature and mixing." Cement and Concrete Research 166 (2023): 107095.
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