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Magnetic resonance studies of cement based materials in inhomogeneous magnetic fields |
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| Authors: | Joanna Boguszynska Peter J. McDonald Jonathan Mitchell Jadwiga Tritt-Goc |
| Affiliation: | a School of Electronics and Physical Sciences, University of Surrey, Surrey, GU2 7XH, United Kingdom b Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17, Poznan, Poland c School of Physical Sciences, University of Kent, Canterbury, Kent, CT2 7NR, United Kingdom d School of Engineering, University of Surrey, Surrey, GU2 7XH, United Kingdom e Department of Chemical Engineering, University of Cambridge, Cambridge, CB2 3RA, United Kingdom |
| Abstract: | Single-sided magnets give hope that Nuclear Magnetic Resonance (NMR) might in future be used for in situ characterisation of hydration and water transport in the surface layers of concrete slabs. Towards that end, a portable NMR-MOUSE (MObile Universal Surface Explorer) has been used to follow the hydration of gypsum based plaster, a Portland cement paste and concrete mortar. The results compare favourably to those obtained using a standard laboratory bench-top spectrometer. Further, stray field imaging (STRAFI) based methods have been used with embedded NMR detector coils to study water transport across a mortar/topping interface. The measured signal amplitudes are found to correlate with varying sample conditions. |
| Keywords: | NMR Curing Pore size distribution Transport properties Cement paste |
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