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Role of the surface morphology in cement gel growth dynamics: A combined nuclear magnetic resonance and atomic force microscopy study

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8 Author(s)
Papavassiliou, G. ; NCSR “Demokritos” Institute of Materials Science, 153 10 Ag. Paraskevi Attiki, Athens, Greece ; Fardis, M. ; Laganas, E. ; Leventis, A.
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1H nuclear magnetic resonance and atomic force microscopy have been correlated in order to exploit the relation between the microscopic morphological properties and the growth dynamics of cement gels during hydration. Studies in a number of samples with different hydration kinetics show that consideration of percolation, gel surface roughness, and related scaling properties is necessary for a thorough understanding of cement hydration kinetics. It is further shown that, at late hydration times, the hydration rate is highly correlated with the cement gel surface roughness exponent χ. A model based on a random walk on a three-dimensional network of rough micropores is proposed in order to explain this effect.© 1997 American Institute of Physics.

Published in:

Journal of Applied Physics  (Volume:82 ,  Issue: 1 )

Date of Publication:

Jul 1997

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