Study on hydration kinetics of C3S in NaNO2 solution at negative temperature

Title: Study on hydration kinetics of C3S in NaNO2 solution at negative temperature
Author(s): H. Ba, Z. Huang, Z. Liu
Paper category : conference
Book title: International RILEM Workshop on Frost Resistance of Concrete
Editor(s): M. J. Setzer, R. Auberg and H. - J. Keck
Print-ISBN: 2-912143-30-6
e-ISBN: 2351580370
Publisher: RILEM Publications SARL
Publication year: 2002
Pages: 81 - 86
Total Pages: 6
Nb references: 3
Language: English

Abstract: By measuring the concentration of Ca2+ in C3S suspension at different negative tem-peratures, a regression for hydration kinetics at early stage is obtained, parameters from which (n=-1.28~-1.15, k=2.21~9.75) and apparent activation energy (E=10.69 KJ/mol) are also obtained. It is shown that the hydration reaction rate is influ¬enced by tempera-ture significantly, while the hydration reaction mechanism changes only a little, it is also found that there is a turning point at -10°C when C3S hydrates at different negative tem-peratures. At present, it is recommended that the apparent activa¬tion energy of hydration reaction at early stage may be used to evaluate the efficiency of anti-freezing admixtures.

Online publication: 2010-06-28
Publication type : full_text
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