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Abrasiveness index of dispersions of Portuguese clays using the Einlehner method: influence of clay parameters

Published online by Cambridge University Press:  27 February 2018

A. Quintela*
Affiliation:
University of Aveiro, Department of Geosciences, GeoBioTec - Geobiosciences, Geotechnologies and Geoengineering Research Center, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal
C. Costa
Affiliation:
University of Aveiro, Department of Geosciences, GeoBioTec - Geobiosciences, Geotechnologies and Geoengineering Research Center, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal
D. Terroso
Affiliation:
University of Aveiro, Department of Geosciences, GeoBioTec - Geobiosciences, Geotechnologies and Geoengineering Research Center, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal
F. Rocha
Affiliation:
University of Aveiro, Department of Geosciences, GeoBioTec - Geobiosciences, Geotechnologies and Geoengineering Research Center, Campus Universitario de Santiago, 3810-193 Aveiro, Portugal
*

Abstract

The unique properties of clays make them suitable for a large number of applications. Among the procedures that can be used to characterize clayey materials, the assessment of the abrasion and the abrasiveness index can be employed to predict the mechanical behaviour of clay samples. However, only a limited number of references to these testing procedures are available in the literature. Several Portuguese clayey samples were collected and the <63 μm fraction was analysed. The main clay minerals present are kaolinite, illite and smectite. The abrasiveness index depends on the granulometric and mineralogical compositions. A lower abrasiveness is induced by the presence of a high abundance of the <2 μm fraction, small mean particle size and a large phyllosilicate content . Kaolinite and illite show good correlation with the abrasiveness index, while smectite decreases abrasion.

Type
The 14th George Brown Lecture
Copyright
Copyright © The Mineralogical Society of Great Britain and Ireland 2014

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