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dc.contributor.authorChai, Gary
dc.contributor.authorVan Staden, Rudi
dc.contributor.authorLoo, Yew-Chaye
dc.date.accessioned2018-09-18T01:44:38Z
dc.date.available2018-09-18T01:44:38Z
dc.date.issued2015
dc.identifier.issn00903973
dc.identifier.doi10.1520/JTE20130149
dc.identifier.urihttp://hdl.handle.net/10072/69333
dc.description.abstractThe stiffness modulus and density of pavement subgrade contribute significantly to the long-term performance of a pavement structure. Subgrade functions primarily as a support for road pavement structures. Poor performance of the pavement structure is often a result of a lack of quality control during the construction of the subgrade layer. This paper presents a case study in which a falling weight deflectometer (FWD) test was used to evaluate whether the subgrade layer had achieved the required design stiffness modulus and density during construction. The characteristics of the FWD deflection basins were analyzed and the stiffness modulus was back-calculated using the CIRCLY5 pavement analysis program. The problems associated with FWD testing directly on subgrade are discussed, and an appropriate test load is proposed. Deflection-based models are developed by relating the FWD center deflection with the in situ stiffness modulus and density of the subgrade layer. A dynamic cone penetrometer test was carried out to determine the in situ stiffness modulus, and the results are compared with the back-calculated stiffness from CIRCLY5.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.languageEnglish
dc.language.isoeng
dc.publisherA S T M International
dc.publisher.placeUnited States
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom1
dc.relation.ispartofpageto9
dc.relation.ispartofissue1
dc.relation.ispartofjournalJournal of Testing and Evaluation
dc.relation.ispartofvolume43
dc.rights.retentionY
dc.subject.fieldofresearchCivil engineering not elsewhere classified
dc.subject.fieldofresearchMaterials engineering
dc.subject.fieldofresearchMechanical engineering
dc.subject.fieldofresearchcode400599
dc.subject.fieldofresearchcode4016
dc.subject.fieldofresearchcode4017
dc.titleIn Situ Assessment of Pavement Subgrade Using Falling Weight Deflectometer
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionVersion of Record (VoR)
gro.facultyGriffith Sciences, Griffith School of Engineering
gro.rights.copyright© 2015 ASTM International. The attached file is reproduced here in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.
gro.hasfulltextFull Text
gro.griffith.authorLoo, Yew-Chaye


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