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Surface relaxation and chemical exchange in hydrating cement pastes: A two-dimensional NMR relaxation study

McDonald, PJ, Korb, JP, Mitchell, J and Monteilhet, L (2005) Surface relaxation and chemical exchange in hydrating cement pastes: A two-dimensional NMR relaxation study PHYSICAL REVIEW E, 72 (1). ? - ?. ISSN 1539-3755

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Abstract

We report the first nuclear magnetic resonance (NMR) two-dimensional correlation T-1-T-2 and T-2-T-2 measurements of hydrating cement pastes. A small but distinct cross peak in the two-dimensional relaxation spectrum provides the first direct evidence of chemical exchange of water between gel and capillary pores occurring over the first 14 days of hydration. A correlation of features along the line T-1=4T(2) provides strong supportive evidence for the surface diffusion model of H-1 nuclear spin relaxation in cements and for a multimodal discrete pore size distribution. Differences in detail of the results are reported for white cement paste and white cement paste with added silica fume. Both the method and the theory presented can be applied more widely to other high surface area materials with other reactive surface areas.

Item Type: Article
Uncontrolled Keywords: Science & Technology, Physical Sciences, Physics, Fluids & Plasmas, Physics, Mathematical, Physics, NUCLEAR-MAGNETIC-RESONANCE, DIFFUSION, LIQUIDS, INVERSION, WATER
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Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:06
Last Modified: 23 Sep 2013 18:25
URI: http://epubs.surrey.ac.uk/id/eprint/104

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