Evaluating Consistency of Nondestructive Evaluation of Flexible Pavement by GPR and PSPA

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dc.contributor.author Ahmed, Mesbah
dc.contributor.author Tarefder, Rafiqul
dc.contributor.author Maji, Arup
dc.date 2018-02-17T23:00:19.000
dc.date.accessioned 2020-06-30T06:52:31Z
dc.date.available 2020-06-30T06:52:31Z
dc.date.issued 2016-01-01
dc.description.abstract <p>Consistency is one of the major issues during the Nondestructive Test & Evaluation (NDT & E) of flexible pavement, i.e., asphalt pavement, by Ground Penetrating Radar (GPR) and Portable Seismic Property Analyzer (PSPA). In some recent nondestructive tests on instrumented pavement section at Milepost (MP) 141 on Interstate-40 (I-40), New Mexico, it is observed that 2-way travel time of GPR signal in unbound layers transmitted by Ground-Coupled Antenna (GCA) varies in different months which leads to different values of layer thickness at a same section and it is believed that the reason is moisture variation. In case of PSPA, tests on Asphalt Concrete (AC) surface show higher level of inconsistency at repeated drops on the same test locations which is believed due to irregular contact between the sensors and surface. To date, unbound materials were collected from the pavement section to measure dielectric constant by Percoemeter in laboratory at varying moisture content. Later, the dielectric constants at varying moisture content are incorporated during the post-processing of GPR data, and thus, the level of consistency is improved. In case of PSPA, quick-setting capping, i.e., a mixture of Plaster of Paris and fine content, is made on AC surface at different locations prior to the tests to ensure firm and smooth contact surfaces. It is observed that consistency of PSPA measurements and interpreted results is improved significantly. Based on the observations, it is recommended to incorporate dielectric constants at varying moisture content to the GPR post-processing. In addition, incorporate capping before a PSPA test on an AC surface.</p>
dc.format.mimetype application/pdf
dc.identifier archive/lib.dr.iastate.edu/qnde/2016/abstracts/104/
dc.identifier.articleid 5049
dc.identifier.contextkey 9263531
dc.identifier.s3bucket isulib-bepress-aws-west
dc.identifier.submissionpath qnde/2016/abstracts/104
dc.identifier.uri https://dr.lib.iastate.edu/handle/20.500.12876/61844
dc.language.iso en
dc.relation.ispartofseries Review of Progress in Quantitative Nondestructive Evaluation
dc.source.bitstream archive/lib.dr.iastate.edu/qnde/2016/abstracts/104/260_Evaluating_Consistency.pdf|||Fri Jan 14 18:20:11 UTC 2022
dc.subject.disciplines Electromagnetics and Photonics
dc.subject.disciplines Geotechnical Engineering
dc.subject.disciplines Materials Science and Engineering
dc.title Evaluating Consistency of Nondestructive Evaluation of Flexible Pavement by GPR and PSPA
dc.type event
dc.type.genre event
dspace.entity.type Publication
relation.isSeriesOfPublication 289a28b5-887e-4ddb-8c51-a88d07ebc3f3
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