Publications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Resilient modulus modelling of unsaturated subgrade soils: laboratory investigation of silty sand subgrade
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.ORCID iD: 0000-0001-9482-1691
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
(English)In: International Journal on Road Materials and Pavement Design, ISSN 1468-0629, E-ISSN 2164-7402Article in journal (Refereed) In press
Abstract [en]

In flexible pavement structures, stiffness of unbound granular layers and subgrade soil significantly contribute to the overall performance of the pavement system. The stiffness of pavement unbound materials is widely characterised by the resilient modulus, Mr, which is obtained from repeated load triaxial (RLT) tests. Although pavement unbound materials are usually in partially saturated conditions and experience seasonal moisture content and therefore suction variations in the field, their stiffness is conventionally characterised using the total stress approach in which the effect of soil suction is not taken into account. Thus, an enhanced approach in predicting the stiffness of subgrade soils has to account for the partially saturated conditions and incorporate soil suction (i.e. matric suction) in the Mr constitutive models. In this study, several Mr prediction models that take into account the effect of pore suction were investigated. The Mr data set from an experimental investigation of two silty sand subgrade soils that was conducted using a suction-controlled RLT testing apparatus was used to optimise the parameter of these models. The capability of the Mr predictive models in capturing the resilient modulus behaviour of the silty sand subgrade soils and its variation due to seasonal changes in the moisture content (soil suction) were evaluated. It was observed that the Mr models that combine the three fundamental stress state variables (confining stress, deviator stress and matric suction) performed better in capturing the resilient modulus behaviour of the subgrade materials.

Keyword [en]
Modulus of elasticity, Subgrade, Saturation (mater), Soil, Suction, Forecast, Mathematical model, Triaxial, Stress
National Category
Infrastructure Engineering Soil Science
Research subject
30 Road: Highway design, 32 Road: Pavement design
Identifiers
URN: urn:nbn:se:vti:diva-7810DOI: 10.1080/14680629.2015.1021107Scopus ID: 2-s2.0-84925427886OAI: oai:DiVA.org:vti-7810DiVA: diva2:799728
Available from: 2015-03-31 Created: 2015-03-31 Last updated: 2016-01-25Bibliographically approved

Open Access in DiVA

No full text

Other links

Publisher's full textScopus

Search in DiVA

By author/editor
Salour, FarhadErlingsson, Sigurdur
By organisation
Pavement Technology
In the same journal
International Journal on Road Materials and Pavement Design
Infrastructure EngineeringSoil Science

Search outside of DiVA

GoogleGoogle Scholar

Altmetric score

Total: 26 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf