Representative volume element of asphalt pavement for electromagnetic measurements
| Autor: | Pablo Olmos Martinez, Pekka Eskelinen, Eeva Huuskonen-Snicker, Terhi Pellinen |
|---|---|
| Přispěvatelé: | Department of Civil and Environmental Engineering, Department of Electrical Engineering and Automation, Department of Civil Engineering, Aalto-yliopisto, Aalto University |
| Jazyk: | angličtina |
| Rok vydání: | 2015 |
| Předmět: |
Void (astronomy)
Materials science bulk density Acoustics ta1172 Transportation Dielectric Geotechnical engineering Dielectric constant ta519 Volume element ta116 ta512 ta218 Civil and Structural Engineering ta212 lcsh:TA1001-1280 Asphalt vector network analyzer Bulk density permittivity asphalt dielectric constant Ground-penetrating radar Permittivity Representative elementary volume lcsh:Transportation engineering Microwave Vector Network Analyzer |
| Zdroj: | Journal of Traffic and Transportation Engineering (English ed. Online), Vol 2, Iss 1, Pp 30-39 (2015) |
| ISSN: | 2095-7564 |
| Popis: | VK: T20703 The motivation for this study was to investigate the representative volume element (RVE) needed to correlate the nondestructive electromagnetic (EM) measurements with the conventional destructive asphalt pavement quality control measurements. A large pavement rehabilitation contract was used as the test site for the experiment. Pavement cores were drilled from the same locations where the stationary and continuous Ground Penetrating Radar (GPR) measurements were obtained. Laboratory measurements included testing the bulk density of cores using two methods, the surface-saturated dry method and determining bulk density by dimensions. Also, Vector Network Analyzer (VNA) and the through specimen transmission configuration were employed at microwave frequencies to measure the reference dielectric constant of cores using two different footprint areas and therefore volume elements. The RVE for EM measurements turns out to be frequency dependent; therefore in addition to being dependent on asphalt mixture type and method of obtaining bulk density, it is dependent on the resolution of the EM method used. Then, although the average bulk property results agreed with theoretical formulations of higher core air void content giving a lower dielectric constant, for the individual cores there was no correlation for the VNA measurements because the volume element seizes deviated. Similarly, GPR technique was unable to capture the spatial variation of pavement air voids measured from the 150-mm drill cores. More research is needed to determine the usable RVE for asphalt. |
| Databáze: | OpenAIRE |
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