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Characterizing the Impact of Moisture on the Permanent Deformation Behavior of Unbound Granular Materials
KTH, School of Architecture and the Built Environment (ABE), Transport Science, Highway and Railway Engineering. Swedish National Road and Transport Research Institute (VTI).ORCID iD: 0000-0002-5871-7587
Swedish National Road and Transport Research Institute (VTI).
2015 (English)In: Compendium of Papers of the 94th Annual Meeting of the Transportation Research Board, Washington, D.C., 2015Conference paper (Refereed)
Abstract [en]

The influence of moisture on the permanent deformation (PD) behavior of several Unbound Granular Materials (UGMs) was investigated through Multi-stage (MS) Repeated-load Triaxial (RLT) tests. Results showed that the accumulation of PD with the number of load applications increased with increased moisture content for all the UGMs. The UGMs with the finer grain size distributions showed greater sensitivity to moisture variations. A simple model was developed to characterize the PD behavior of UGMs under cyclic loading of varying magnitudes. The model was calibrated for the UGMs using the experimental data. Using the model, reasonably good quality of fit was obtained for the UGMs within the range of moisture content used for the tests. Then the material parameters of the model were studied for their sensitivity to moisture. It was found that one parameter varied linearly with the moisture content while the others remained fairly constant. Thus the proposed model with one of its parameters as a linear function of moisture content can be used for predicting the PD behavior of UGMs with variation in moisture.

Place, publisher, year, edition, pages
Washington, D.C., 2015.
Keyword [en]
Unbound Granular Materials, Permanent Deformation, Moisture, Multi-stage Repeated-load Triaxial Test, Model
National Category
Infrastructure Engineering
Research subject
Civil and Architectural Engineering; Transport Science
URN: urn:nbn:se:kth:diva-162371OAI: diva2:797709
Transportation Research Board (TRB) 94th Annual Meeting, Washington, D.C., January 11-15, 2015

QC 20150325

Available from: 2015-03-24 Created: 2015-03-24 Last updated: 2015-03-25Bibliographically approved

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Rahman, Mohammad ShafiqurErlingsson, Sigurdur
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