Estimating permeability of cement paste using pore characteristics obtained from DEM-based modelling

Kai Li, Piet Stroeven, Martijn Stroeven, Bert Sluijs

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Although an earlier developed numerical methodology for permeability estimation of cement pastes can provide satisfactory results in comparison with experiments, it would be of engineering interest to find a simpler way to perform the same task. This method referred to by “the shorter approach” is presented in this paper. In the approach, water permeability is only correlated to the water-filled porosity of the specimen. A mathematical model is proposed to approximately calculate the water permeability using the water-filled porosity as the only input parameter. The confidence limit is found to yield an appropriate level of reliability. To better understand the proposed mathematical relationship, pore throat size and connectivity of the capillary pores are separately shown as a function of the water-filled porosity. Their respective and successive impacts on permeability is illustrated in this way.

Original languageEnglish
Pages (from-to)740-746
Number of pages7
JournalConstruction and Building Materials
Volume126
DOIs
Publication statusPublished - 15 Nov 2016

Keywords

  • Cementitious materials
  • Permeability
  • Pore connectivity
  • Pore throat size
  • Saturation degree

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