Change search
ReferencesLink to record
Permanent link

Direct link
Resilient Modulus Modeling of Unsaturated Subgrade Soils with Matric Suction Control
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering.
Arizona State University.
2014 (English)In: Asphalt Pavements, London: Taylor & Francis Group, 2014, 1145-1154 p.Conference paper (Refereed)
Abstract [en]

Stiffness of pavement subgrade materials that is commonly determined by the resilient modulus parameter is an important component in the mechanistic design of flexible pavement structures. Environmental effects such as seasonal variations in pavement moisture content can considerably influence this material property which should be properly consideredin any realistic pavement design. The seasonal changes in moisture condition affects the stress state in the subgrade due to changes in the matric suction which is an important stress state variable in unsaturated soil mechanics. In this study, a modified test procedure and apredictive resilient modulus model that takes into account the subgrade soil matric suction asa stress state variable is presented. Two different silty sand subgrade materials were tested inunsaturated conditions using a series of Repeated Load Triaxial (RLT) tests. The tests wereperformed under various matric suctions (moisture contents) to enhance the understandingof its effect on the resilient modulus. The results showed a considerable influence of the moisturecontent (matric suction) on the subgrade resilient modulus. The resilient modulus datatogether with the suction measurements were used and a set of parameters for the enhancedpredictive model were developed. This model accounts for seasonal variation of subgradematerial stiffness by incorporating suction as a stress state variable.

Place, publisher, year, edition, pages
London: Taylor & Francis Group, 2014. 1145-1154 p.
Keyword [en]
Unsaturated soil, Enviorment, Moisture content, Flexible pavement
National Category
Geotechnical Engineering
URN: urn:nbn:se:kth:diva-151372DOI: 10.1201/b17219ScopusID: 2-s2.0-84904113509ISBN: 978-1-138-02693-3ISBN: 978-1-315-73675-4OAI: diva2:748191
The 12th International Conference on Asphalt Pavement (ISAP 2014, Raleigh, North Carolina, USA, 1-5 June 2014)

QC 20150218

Available from: 2014-09-18 Created: 2014-09-18 Last updated: 2015-02-18Bibliographically 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
Highway and Railway Engineering
Geotechnical Engineering

Search outside of DiVA

GoogleGoogle Scholar
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Altmetric score

Total: 83 hits
ReferencesLink to record
Permanent link

Direct link