Benchmark of experimental techniques for measuring and controlling suction

A. Tarantino, D. Gallipoli, C. E. Augarde, V. de Gennaro, R. Gomez, L. Laloui, C. Mancuso, G. El Mountassir, J. J. Munoz, J. M. Pereira, H. Peron, G. Pisoni, E. Romero, A. Raveendiraraj, J. C. Rojas, D. G. Toll, S. Tombolato, S. Wheeler

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)

Abstract

The paper presents a benchmarking study carried out within the 'Mechanics of Unsaturated Soils for Engineering' (MUSE) network aimed at comparing different techniques for measurement and control of suction. Techniques tested by the eight 'Mechanics of Unsaturated Soils for Engineering' research teams include axis-translation (pressure plate and suction-controlled oedometer), highcapacity tensiometer and osmotic technique. The soil used in the exercise was a mixture of uniform sand, sodium bentonite (active clay) and kaolinite (non-active clay), which were all commercially available. Samples were prepared by one team and distributed to all other teams. They were normally consolidated from slurry under one-dimensional conditions (consolidometer) to a given vertical stress. The water retention characteristics of the initially saturated specimens were investigated along the main drying path. Specimens were de-saturated by applying suction through the liquid phase when using an axis-translation technique or osmotic method and de-saturated by air-drying, when suction was measured using high-capacity tensiometers. In general, the same technique was tested by at least two teams. The water retention curves obtained using the different techniques are compared and discrepancies are discussed in the paper.

Original languageEnglish
Pages (from-to)303-312
Number of pages10
JournalGeotechnique
Volume61
Issue number4
DOIs
Publication statusPublished - Apr 2011

Keywords

  • Laboratory tests
  • Partial saturation
  • Suction

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Earth and Planetary Sciences (miscellaneous)

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