Impact of KOH on the interfacial precipitation rates of C-S-H during the early hydration of C3S
Wagner D, Bellmann F, Neubauer J (2021)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2021
Journal
Book Volume: 146
Article Number: 106488
DOI: 10.1016/j.cemconres.2021.106488
Abstract
In this work we investigated the influence of alkalis on the hydration of two triclinic samples of C3S. One pure
C3S and one Al-doped C3S (0.5 wt.-% Al2O3). We added differently concentrated KOH solutions representing
alkalis in the pore solution, which lead to an increase of the interfacial precipitation rates of C-S-H during the
hydration of C3S compared to the hydration without KOH. Isothermal calorimetry was conducted for the
determination of the rates of reaction during the hydration process and ICP-OES measurements for the determination
of the pore solution composition at certain times of hydration. The increasing effect of KOH solution on
the calculated interfacial precipitation rates from pore solution data can explain the enhancement of the rates of
reaction recorded by heat flow calorimetry during the early hydration. Therefore, the interfacial precipitation
rates of C-S-H can accurately describe the acceleration effect of alkalis on the early hydration of C3S.
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Germany (DE)How to cite
APA:
Wagner, D., Bellmann, F., & Neubauer, J. (2021). Impact of KOH on the interfacial precipitation rates of C-S-H during the early hydration of C3S. Cement and Concrete Research, 146. https://dx.doi.org/10.1016/j.cemconres.2021.106488
MLA:
Wagner, Daniel, Frank Bellmann, and Jürgen Neubauer. "Impact of KOH on the interfacial precipitation rates of C-S-H during the early hydration of C3S." Cement and Concrete Research 146 (2021).
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