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  4. Interactions between alite and C(3)A-gypsum hydrations in model cements
 
research article

Interactions between alite and C(3)A-gypsum hydrations in model cements

Quennoz, Alexandra  
•
Scrivener, Karen L.  
2013
Cement and Concrete Research

This paper focuses on the interactions that occur between cement phases during early hydration, especially between the hydration of alite and C(3)A-gypsum. This study shows that alite reaction is accelerated in the presence of gypsum. This acceleration was attributed to the interaction of gypsum with Aluminium ions present in alite. Three exothermic peaks attributable to the aluminate reaction could be observed in model cements instead of one in C(3)A-gypsum systems. The first corresponds to the C(3)A dissolution when the sulfate ions run out, but the product formed is ettringite. The second corresponds to the formation of calcium monosulfoaluminate, but the third could not be assigned to any specific reaction. The effect of alite/C(3)A ratio, the dispersion of the phases in the grains and the temperature were also investigated: With respect to temperature, it was found that the activation energy for the C(3)A-gypsum reaction was higher than that for alite. (c) 2012 Elsevier Ltd. All rights reserved.

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Type
research article
DOI
10.1016/j.cemconres.2012.10.018
Web of Science ID

WOS:000315314400006

Author(s)
Quennoz, Alexandra  
Scrivener, Karen L.  
Date Issued

2013

Publisher

Pergamon-Elsevier Science Ltd

Published in
Cement and Concrete Research
Volume

44

Start page

46

End page

54

Subjects

Hydration (A)

•

Calorimetry (A)

•

Ca3SiO5-Ca3Al2O6 (D)

•

Sulfate (D)

•

Activation energy

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LMC  
Available on Infoscience
March 28, 2013
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/90794
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