Repository logo

Infoscience

  • English
  • French
Log In
Logo EPFL, École polytechnique fédérale de Lausanne

Infoscience

  • English
  • French
Log In
  1. Home
  2. Academic and Research Output
  3. Journal articles
  4. Volume change characteristics of fine-grained soils due to sequential thermo-mechanical stresses
 
research article

Volume change characteristics of fine-grained soils due to sequential thermo-mechanical stresses

Shetty, R.
•
Singh, D.N
•
Ferrari, Alessio  
2019
Engineering Geology

Know-how of volume change characteristics, VCC, of the fine-grained soils, exposed to thermal stresses, is essential for design of various thermo-active structures. These stresses are known to induce excess pore-water pressure, Δu θ , in the saturated state of such soils, which in turn affects their compression and shear strength characteristics. In this context, through several experimental studies, the effect of thermo-mechanical stress-path, the over-consolidation ratio (OCR) and degree of saturation on VCC (viz., thermally induced volumetric strain, ε vθ , compression and re-compression indices, c c and c r ) of the fine-grained soils has been demonstrated by earlier researchers. However, the response of these soils when exposed to sequential thermal and mechanical stresses, STMS, due to temperature fluctuation and continued infrastructure development, on VCC has seldom been studied. This motivated us to investigate the VCC of the fine-grained soils, by subjecting them to STMS in a suitably modified oedometer setup which facilitates temperature controlled tests. From the results of STMS tests, it is seen that the ε vθ of these soils exposed to thermal cycles (20-60-20 °C) is independent of the thermal stress history experienced at different applied vertical stress, σ v , (= 60, 125, 250 kPa). Furthermore, from the analysis of deformation-time curve of the thermal loading phase, a methodology for direct determination of the volume change component of fine-grained soils, due to structural rearrangement, ΔV sθ , has been proposed. The methodology enables direct computation of the coefficient of volume change due to structural rearrangement, α sθ , that would aid in direct prediction of Δu θ from the deformation-time curve of thermal loading phase.

  • Files
  • Details
  • Metrics
Loading...
Thumbnail Image
Name

1-s2.0-S0013795218318222-main.pdf

Type

Publisher's Version

Version

http://purl.org/coar/version/c_970fb48d4fbd8a85

Access type

openaccess

Size

1.1 MB

Format

Adobe PDF

Checksum (MD5)

a10e709a6c2996600b82f9a1e1b70f96

Logo EPFL, École polytechnique fédérale de Lausanne
  • Contact
  • infoscience@epfl.ch

  • Follow us on Facebook
  • Follow us on Instagram
  • Follow us on LinkedIn
  • Follow us on X
  • Follow us on Youtube
AccessibilityLegal noticePrivacy policyCookie settingsEnd User AgreementGet helpFeedback

Infoscience is a service managed and provided by the Library and IT Services of EPFL. © EPFL, tous droits réservés