Jensen, Ole Mejlhede2; Hansen, Per Freiesleben3; Coats, Alison M.4; Glasser, Fred P.4
1 Department of Structural Engineering and Materials, Technical University of Denmark2 Department of Civil Engineering, Technical University of Denmark3 Aalborg University4 University of Aberdeen
In this paper chloride ingress in cement paste and mortar is followed by electron probe microanalysis. The influence of several paste and exposure parameters on chloride ingress are examined (e.g., water-cement ratio, silica fume addition, exposure time, and temperature), The measurements are modelled on Fick's law modified by a term for chloride binding. Inclusion of chloride binding significantly improves the profile shape of the modelled ingress profiles. The presence of fine aggregate and formation of interfacial transition zones at paste-aggregate boundaries does not significantly affect diffusion rates. (C) 1999 Elsevier Science Ltd. All rights reserved.
Cement and Concrete Research, 1999, Vol 29, Issue 9, p. 1497-1504