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Evaluation of permanent deformation characteristics of unbound granular materials from multi-stage repeated load triaxial test
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology. KTH.ORCID iD: 0000-0002-5871-7587
2013 (English)In: Transportation Research Record, ISSN 0361-1981, no 2369, 17 p.11-19 p.Article in journal (Refereed) Published
Abstract [en]

Rutting in flexible pavements is often associated with permanent deformation of the unbound granular layer. The current permanent deformation models are only applicable to a single stress path in repeated load triaxial (RLT) tests. In this paper, a simple approach using the time hardening concept was introduced to continuously model the permanent deformation of unbound granular materials (UGM) in multi-stage (MS) repeated load triaxial (RLT) tests. Three existing permanent deformation models were reconstructed to be implemented with this method and one model was slightly modified to better suit this approach. This approach was validated by calibrating these reconstructed models using data from MS RLT tests on three different UGM used in base layers of flexible pavement structures. The calibrations were done by optimizing the material parameters of the models using least square curve fitting method. The shakedown ranges were also calculated for each stress path of the MS RLT tests to compare these models in simulating these ranges. Generally, very good fits were obtained for these models where the modified model showed the best agreement.

Place, publisher, year, edition, pages
Washington DC: Transportation Research Board , 2013. no 2369, 17 p.11-19 p.
Keyword [en]
Rut, Deformation, Model (not math), Calculation, Unbound base, Crushed stone, Repetitive loading, Laboratory (not an organization), Test
Keyword [sv]
Hjulspår, Deformation, Modeller, Beräkning, Obundet bärlager, Krossat berg, Upprepad belastning, Laboratorium, Test
National Category
Materials Engineering
Research subject
Road: Materials, Road: Aggregate and stone materials
Identifiers
URN: urn:nbn:se:vti:diva-5385DOI: 10.3141/2369-02ISI: 000331850700002OAI: oai:DiVA.org:vti-5385DiVA: diva2:674218
Conference
TRB Annual Meeting 2013
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2016-02-25Bibliographically approved

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Erlingsson, SigurdurRahman, Mohammad Shafiqur
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CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • 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