Using X-ray transmission/attenuation to quantify fluid absorption in cracked concrete

Jason Weiss, Mette R. Geiker, Kurt Kielsgaard Hansen

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Abstract

Cracks can alter the rate of fluid transport in concrete. Unfortunately, however, quantitative information is lacking to provide definitive statements regarding the extent to which cracks reduce durability or long-term performance. This paper describes a study that used X-ray transmission/attenuation to determine the influence of cracking on the absorption of fluid in concrete. Specifically, an experimental method is presented which uses a wedge splitting test to pre-crack specimens. These pre-cracked specimens were dried and ponded with water. At various times after the start of water ponding, X-ray attenuation measurements were taken using a grid of points around the crack. By repeating this measurement and comparing the change in X-ray transmission/attenuation, the ingress of the fluid could be determined by locating the position of the moisture front. An approach is presented to determine the geometry of the crack by using water absorption perimeter measurements of the wetting front in the concrete.
Original languageEnglish
JournalInternational Journal of Materials and Structural Integrity
Volume9
Issue number1-3
Pages (from-to)3-20
Number of pages18
ISSN1745-0055
DOIs
Publication statusPublished - 2015

Keywords

  • Absorption
  • Concrete
  • Cracks
  • Ingress
  • X-ray

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