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On the interpretation of 1H 2-dimensional NMR relaxation exchange spectra in cements: Is there exchange between pores with two characteristic sizes or Fe3+ concentrations?

Valori, A, Rodin, V and McDonald, PJ (2010) On the interpretation of 1H 2-dimensional NMR relaxation exchange spectra in cements: Is there exchange between pores with two characteristic sizes or Fe3+ concentrations? Cement and Concrete Research, 40 (9). 1375 - 1377. ISSN 0008-8846

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Abstract

We discuss the effect of paramagnetic impurity content (thought to be predominantly Fe3+) in cement pastes on the interpretation of 1H NMR T2–T2 exchange spectra. Through measurements on synthesised C–S–Hwith greatly reduced paramagnetic impurity concentration, we show that the spectra cannot be explained by exchange between regions of different Fe3+ concentration but rather are explained by exchange between regions of different pore size.

Item Type: Article
Additional Information: Copyright 2010. Elsevier. All rights reserved. NOTICE: this is the author’s version of a work that was accepted for publication in Cement and Concrete Research. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Cement and Concrete Research, 40(9), 2010, DOI:10.1016/j.cemconres.2010.03.022
Divisions: Faculty of Engineering and Physical Sciences > Physics
Depositing User: Symplectic Elements
Date Deposited: 08 Mar 2012 14:21
Last Modified: 23 Sep 2013 19:00
URI: http://epubs.surrey.ac.uk/id/eprint/111029

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