Thermal expansion kinetics - Method to measure permeability of cementitious materials: III, effect of viscoelasticity

George W. Scherer

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

When a porous material that is saturated with liquid is heated, the liquid expands much more than the solid phase. If the permeability is low, then the liquid may not be able to escape as it expands, so it expands within the pores and causes dilatation of the body. In that case, by analyzing the kinetics of dilatation during a change in temperature, it is possible to extract the permeability. The behavior of an elastic porous solid was analyzed previously. In this paper, we consider the case of a viscoelastic material; for cementitious materials, the effect of relaxation is shown to be significant, but the elastic analysis will usually provide sufficient accuracy. If significant viscoelastic relaxation occurs, it is revealed by comparing the data from samples of different sizes.

Original languageEnglish (US)
Pages (from-to)1509-1516
Number of pages8
JournalJournal of the American Ceramic Society
Volume87
Issue number8
StatePublished - Aug 1 2004

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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