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Particle loss and volume change on dissolution: experimental results and analysis of particle size and amount effects

McDougall, John; Kelly, Darren; Barreto, Daniel


Darren Kelly


Soil particles may be lost through dissolution, degradation or erosion. Regardless of the process of loss, there follows a change in soil structure both in terms of phase composition and grading. In this paper, the influence of size and amount of particle loss on phase composition at two stresses is investigated. The tests are performed on sand–salt mixtures, loaded in a modified permeation oedometer and subsequently dissolved. Changes in overall volume and void ratio are presented. Two significant observations about the volumetric consequences of particle loss can be made. First, overall volume changes are directly related to the amount of dissolved particles and to a lesser extent, the size of particle lost. Second, particle loss leads to an increase in void ratio; the magnitude of the increase is related to the amount of dissolved particles but appears not to be sensitive to either the size of particle lost or the pre-dissolution void ratio. Based on the observed response and a dissolution-induced void change parameter, the influence of different mechanisms of volume change is discussed. Tests were performed at two different vertical stresses with no discernible influence on void ratio change.

Journal Article Type Article
Online Publication Date Feb 13, 2013
Publication Date 2013-12
Deposit Date Oct 29, 2013
Print ISSN 1861-1125
Electronic ISSN 1861-1133
Publisher BMC
Peer Reviewed Peer Reviewed
Volume 8
Issue 6
Pages 619-627
Keywords Dissolution; Laboratory testing; Micromechanics; Particle loss;
Public URL
Publisher URL Http://