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Moisture sensitivity of unbound granular materials
Swedish National Road and Transport Research Institute, Infrastructure, Pavement Technology.
2012 (English)In: EPAM 2012: Malmö, Sweden, 5–7 September: 4th European pavement and asset management conference / [ed] Kent Gustafson, Linköping: Statens väg- och transportforskningsinstitut, 2012, , 12 p.Conference paper, (Other academic)
Abstract [en]

One of the main structural units in thin flexible pavement is the unbound aggregate base course. It contributes to the overall load spreading mechanism of the structure due to traffic loading and provides an underneath support to the asphalt concrete layer. The material characteristic of unbound layers are therefore of great importance for the performance of the structure. Unbound base courses show stress as well as moisture dependent behaviour during external loading. This is true for both their stiffness and resistance against permanent deformation properties. A series of Repeated Load Triaxial (RLT) tests has been carried out on a typical unbound aggregate base layer to investigate its behaviour in order to improve the modelling of the moisture sensitivity. Both the resilient test and multi-stage loading approach have been used providing information on the resilient as well as the permanent deformation characteristics. Results showed that the stiffness decreases and permanent deformation increases with increasing moisture content.

Place, publisher, year, edition, pages
Linköping: Statens väg- och transportforskningsinstitut, 2012. , 12 p.
Keyword [en]
Unbound base, Crushed stone, Moisture, Sensitivity, Resilience, Deformation, Properties, Triaxial, Laboratory (not an organization), Test
Keyword [sv]
Obundet bärlager, Krossat berg, Fukt, Känslighet, Deformation, Egenskaper, Treaxlig, Laboratorium, Test
National Category
Other Materials Engineering
Research subject
50 Road: Materials, 56 Road: Aggregate and stone materials
Identifiers
URN: urn:nbn:se:vti:diva-5309Libris ID: 13540254ISBN: 978-91-637-1432-0 (print)OAI: oai:DiVA.org:vti-5309DiVA: diva2:674142
Conference
EPAM 2012: Malmö, Sweden, 5–7 September: 4th European pavement and asset management conference
Available from: 2013-12-03 Created: 2013-12-03 Last updated: 2014-10-02Bibliographically approved

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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