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

P. J. McDonald, J.-P. Korb, J. Mitchell, and L. Monteilhet

Phys. Rev. E 72, 011409 – Published 27 July 2005

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 $T_{1} = 4 T_{2}$ provides strong supportive evidence for the surface diffusion model of ${}^{1}H$ 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.

2 More

Received 3 April 2005

DOI:https://doi.org/10.1103/PhysRevE.72.011409

Authors & Affiliations

P. J. McDonald¹, J.-P. Korb², J. Mitchell¹, and L. Monteilhet^1,2

¹Department of Physics, School of Electronics and Physical Sciences, University of Surrey, Guildford, GU2 7XH, United Kingdom
²Laboratoire de Physique de la Matière Condensée, UMR 7643 CNRS, Ecole Polytechnique, 91128 Palaiseau, France

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 72, Iss. 1 — July 2005

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Physical Review E

covering statistical, nonlinear, biological, and soft matter physics