Effect of Void Ratio on K 0 of a Sand by Means of Triaxial Stress-Path Testing

Teresa Santana, Mariline Candeias

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


This paper presents an experimental technique using a computer controlled triaxial test to evaluate K0, not requiring the use of any radial measurement transducers. It uses commercial software that applies a ramp of radial stress with back volume measurement and control. The method is applicable only to saturated specimens in drained conditions. The equipment used is briefly described, as well as the testing procedures. Results of laboratory tests on Toyoura sand specimens, with four different initial void ratios, are presented. For the preparation of all specimens tested, a dry funnel deposition method with undercompaction was used. It was concluded that, for the initial void ratios tested and for the stress level induced, stress-strain behavior fell in a narrow range the K0NC values were slightly higher for looser specimens, although lower than predicted by Jaky’s equation.

Original languageEnglish
Pages (from-to)257-266
Number of pages10
JournalGeotechnical and Geological Engineering
Issue number1
Publication statusPublished - 1 Feb 2018


  • Coefficient of earth pressure at rest
  • Laboratory triaxial test
  • Toyoura sand
  • Void ratio

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