Double layers in pyrometamorphosed bentonite: index properties and complex permittivity

A. Zerwer*, J. C. Santamarina

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Index properties such as grain size distribution, specific gravity, and plasticity index, and measurements of complex permittivity between 10 MHz and 1.3 GHz showed that pyrometamorphosed bentonites had larger grain size, lower specific surface, high electrolyte concentration, decreased double layer phenomena, increase in the ratio of free to adsorbed water for a given moisture content, and reduced plasticity. These transformations have important implications for phenomena such as swelling, permeability, diffusion and adsorption, which affect the performance of bentonite as an engineering and industrial material.

Original languageEnglish (US)
Pages (from-to)283-291
Number of pages9
JournalApplied Clay Science
Issue number4
StatePublished - Nov 1994
Externally publishedYes

ASJC Scopus subject areas

  • Geology
  • Geochemistry and Petrology


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