Characterization of the secondary swelling of compacted Maryland clay
Priority Research Centre for Geotechnical and Materials Modelling, School of Engineering, The University of Newcastle, NSW, Australia
a Corresponding author: Xianfeng.Liu@newcastle.edu.au
This paper presents the result of a multi-scale experimental investigation on the phenomenon of secondary swelling. Specimens of compacted Maryland clay were prepared under different initial conditions (void ratio and water content), loaded at different levels of vertical stress and inundated until secondary swelling was observed. One test was also performed with suction control and incremental swelling. These tests were complemented by micro structural analyses via mercury intrusion porosimetry. The coefficient of secondary swelling, defined as the gradient of the evolution of void ratio with logarithm of time was calculated and correlated to the macro scale strain. Several trends were observed and it was showed that, under low confinement, the secondary swelling mostly takes place in the macro pores.
© The Authors, published by EDP Sciences, 2016
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.