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Influence of post compaction on the moisture sensitive resilient modulus of unbound granular materials
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.ORCID iD: 0000-0002-5871-7587
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
2016 (English)In: Procedia Engineering, Elsevier, 2016, 929-936 p.Conference paper (Refereed)
Abstract [en]

The impact of moisture on the resilient modulus (MR) of unbound granular materials (UGMs) was investigated based on repeated load triaxial (RLT) tests and considering the effect of post compaction (PC) from cyclic loading. Results showed that although MR decreases with increased moisture, it may appear to increase with increased moisture if the PC process is aided by moisture for a relatively large number of load applications. When limited PC was involved, the parameter k1 of the k-θ model decreased with increased moisture while the parameter k2 was unaffected. On the other hand, when significant amount of PC took place, k2 increased with increased moisture.

The mechanistic-empirical pavement design guide (MEPDG) model worked well to capture the influence of moisture on the stiffness when MR decreased with increased moisture. However, it did not work when MR increased with increased moisture due to the PC effect. On the other hand, an alternative approach expressing k1 and k2 as functions of moisture worked well for both situations. Generally, this study suggested that the effect of PC should be considered in modelling the impact of moisture on MR for better accuracy.

Place, publisher, year, edition, pages
Elsevier, 2016. 929-936 p.
Keyword [en]
Unbound base, Modulus of elasticity, Moisture, Variability, Repetitive loading, Triaxial, Compaction (state of), Stiffness, Mathematical model
National Category
Infrastructure Engineering
Research subject
30 Road: Highway design, 32 Road: Pavement design
Identifiers
URN: urn:nbn:se:vti:diva-10875DOI: 10.1016/j.proeng.2016.06.074ScopusID: 2-s2.0-84982883653OAI: oai:DiVA.org:vti-10875DiVA: diva2:957608
Conference
3rd International Conference on Transportation Geotechnics, ICTG 2016, 4 September 2016 through 7 September 2016
Available from: 2016-09-02 Created: 2016-08-31 Last updated: 2016-09-20Bibliographically approved

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Rahman, Mohammad ShafiqurErlingsson, Sigurdur
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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