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Application of the sharp front model to capillary absorption in concrete materials with bimodal pore size distribution



Title: Application of the sharp front model to capillary absorption in concrete materials with bimodal pore size distribution
Author(s): I. Ioannou, C. Hall, A. Hamilton
Paper category : conference
Book title: International RILEM Symposium on Concrete Modelling - ConMod '08
Editor(s): E. Schlangen and G. De Schutter
Print-ISBN: 978-2-35158-060-8
e-ISBN: 978-2-35158-076-9
Publisher: RILEM Publications SARL
Publication year: 2008
Pages: 521 - 525
Total Pages: 5
Nb references: 8
Language: English


Abstract: The unusual pore size distribution, and in particular the presence of large pores, in certain construction materials results in an anomalous water sorptivity and a marked deviation from the standard t½ law. In this paper, we report the results of a water uptake test carried out in order to investigate the cause of the imbibition anomaly in poorly compacted concrete. Sharp Front (SF) analysis is used to model the liquid transport properties of the material. The experimental results confirm that the overall capillary absorption into poorly compacted concrete may be described reasonably well as the sum of two processes: a capillary absorption into the large pores with the low capillary suction, which does not follow the classical t½ behaviour; and a slow capillary absorption into the fine pores which obeys the standard t½ kinetic law.


Online publication: 2009-06-15
Publication type : full_text
Public price (Euros): 0.00