Saturation process in triaxial tests
DOI:
https://doi.org/10.14195/2184-8394_104_3Abstract
Within the scope of study of the behaviour of granite residual soils of Porto for their use as capping layer for pavements, triaxial tests under drained isotropic consolidation were carried out over compacted samples. An important part of this process consisted of obtaining the complete saturation of the soil sample, prior to the loading test stages, in order to simulate the most adverse conditions to which the pavement will be subjected to in operation, that is, with the full saturation of the embankment. Another important fact must be added, which is the need to ensure that the stress analysis is made with guaranteed full control of the two components: pore pressure and effective stress, and that the former is not actually affected by unaccountable suction values. As a result of this study, during the course of this work and because of the vagueness in the vast international literature (inclusive in testing standards) on this issue of effectively ensuring full saturation, several sample saturation processes were used in order to find the most suitable method for this particular case. In what follows, these subjects are described in detail.
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