Changes in Swelling Pressure and Permeability of Bentonite Caused by Ion Exchange of Montmorillonite

  • Yasutaka WatanabeEmail author
  • Shingo Yokoyama
Conference paper
Part of the Environmental Science and Engineering book series (ESE)


Permeability tests of the compacted bentonite-sand mixture using salt solutions were carried out. Exposure of the Ca type-bentonite to NaCl or KCl solutions after fully saturation with deionized water caused ion exchange of the montmorillonite. After Ca ion exchanged to Na ion, the swelling pressure of the sample increased and the permeability decreased when the low ionic strength condition, comparing with the initial value before Na ion exchange. While, after Ca ion exchanged to K ion, increase in the swelling pressure and reduction of the permeability were insignificant. K and Na ions showed the different effect of ion exchange on the engineering properties of the bentonite.


Bentonite Montmorillonite Exchangeable cation Swelling Permeability 


  1. Maio CD (1996) Exposure of bentonite to salt solution: osmotic and mechanical effects. Géotechnique 46(4):695–707CrossRefGoogle Scholar
  2. Robinson RG, Allam MM (1998) Effect of clay mineralogy on coefficient of consolidation. Clays Clay Miner 46(5):596–600CrossRefGoogle Scholar
  3. Sato T, Watanabe T, Otsuka R (1992) Effects of layer charge, charge location, and energy charge on expansion properties of dioctahedral smectites. Clays Clay Miner 40(1):103–113CrossRefGoogle Scholar
  4. Watanabe Y, Tanaka Y (2016) Permeability test for Ca-type bentonite using a rigid wall permeameter. In: Proceedings of the 60th JGS symposium on geotechnical engineering, Japan, pp 1–4Google Scholar
  5. Watanabe Y, Yokoyama S (2017) Measurement of montmorillonite content of bentonite by methylene blue adsorbed. In: Proceedings of the Goldschmidt 2017, ParisGoogle Scholar

Copyright information

© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Central Research Institute of Electric Power IndustryAbiko-Shi, ChibaJapan

Personalised recommendations