University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Is colour change a good measure of a water penetration front?

Fischer, N, Fischer, N, Haerdtl, R and McDonald, PJ (2015) Is colour change a good measure of a water penetration front? Magazine of Concrete Research, 67 (19). pp. 1048-1053.

[img]
Preview
Text
Fischer_et_al.pdf
Available under License : See the attached licence file.

Download (432kB) | Preview
[img] Text
Magazine of concrete research 2015 Fischer.pdf
Restricted to Repository staff only
Available under License : See the attached licence file.

Download (336kB)
[img]
Preview
Text (licence)
SRI_deposit_agreement.pdf
Available under License : See the attached licence file.

Download (33kB) | Preview

Abstract

© 2015, TELFORD. All rights reserved. GARField nuclear magnetic resonance (NMR) profiling is used to demonstrate that the sharp colour change boundary commonly used to locate the water front in cement and concrete capillary absorption tests is a poor indicator of the true depth of water penetration. Across a range of mortars and concretes, NMR invariably shows a smooth and often nearzero gradient in the degree of saturation at this boundary. Any sharp front that does exist, as might arise from a strong dependence of the effective diffusivity on concentration and a multi-modal pore size distribution on the nanoscale, is always far beyond the colour change line.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Physics
Authors :
AuthorsEmailORCID
Fischer, NUNSPECIFIEDUNSPECIFIED
Fischer, NUNSPECIFIEDUNSPECIFIED
Haerdtl, RUNSPECIFIEDUNSPECIFIED
McDonald, PJUNSPECIFIEDUNSPECIFIED
Date : 1 January 2015
Identification Number : 10.1680/macr.14.00354
Additional Information : Copyright ICE Publishing http://www.icevirtuallibrary.com/journal/jmacr
Depositing User : Symplectic Elements
Date Deposited : 28 Oct 2015 12:57
Last Modified : 29 Oct 2015 09:31
URI: http://epubs.surrey.ac.uk/id/eprint/808804

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800