Significance of Corrections and Impact of Saline Pore Fluid on Kaolin
Publication: Journal of Materials in Civil Engineering
Volume 30, Issue 11
Abstract
Engineering behavior of fine-grained porous media, predominantly encountered in dredged sediments from ports, tailings from mining operations, and geoenvironmental barrier systems, are dictated by their microstructural parameters. As such, alteration in pore fluid chemistry induces changes in the fabric of fine-grained soils, which contributes to a modified geoengineering response. The present study assessed pore fluid salinity effects on gradational and index properties, linear volume change, and free swell behavior of a reference fine-grained geomaterial, kaolin. Flocculation of kaolin in saline pore fluids and subsequent changes in some of its properties are discussed in this paper. Furthermore, for studies involving geomaterials with saline pore fluids, differences arising out of results reported with reference to three-phased (soil solid–water–air) and four-phased (soil solid–salt–water–air) idealizations are also highlighted.
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Acknowledgments
This work was funded by support from the Australian Government Research Training Program Scholarship (formerly International Postgraduate Research Scholarship), UQ Centennial Scholarship (University of Queensland), and Top Up Scholarship (School of Civil Engineering, University of Queensland) awarded to Mr. P.N. Mishra. The support of the Port of Brisbane/University of Queensland research venture is gratefully acknowledged. We thank Ms. Annabel Liu for her help in carrying out the linear shrinkage test. We also thank the anonymous reviewers for their time and suggestions to improve the manuscript.
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Published In
Journal of Materials in Civil Engineering
Volume 30 • Issue 11 • November 2018
Copyright
©2018 American Society of Civil Engineers.
History
Received: Jun 7, 2017
Accepted: Apr 11, 2018
Published online: Aug 3, 2018
Published in print: Nov 1, 2018
Discussion open until: Jan 3, 2019
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