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Evaluation air void content of drilled porous asphalt mixture cores using non-destructive X-ray computed tomography

Vieira, T. ; Lundberg, J. LU orcid ; Eriksson, O. ; Guarin, A. ; Gong, S. and Erlingsson, S. (2022) 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2022 In Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2022 p.48-58
Abstract

Tomography technology is not usual when investigating drilled asphalt cores properties. Currently, there is no internationally recognised standard tomography method for asphalt pavements. Tomography provides, however, a non-destructive alternative to traditional, usually destructive, testing of drilled cores. Furthermore, tomography offers possibilities, which traditional laboratory analyses do not. It is not straightforward to distinguish mastic and aggregates in tomography results while air void content is less difficult to assess. To have a more reliable assessment of drilled cores properties found by tomography, the method must be carefully planned, executed, and the results compared to those of traditional laboratory methods. In... (More)

Tomography technology is not usual when investigating drilled asphalt cores properties. Currently, there is no internationally recognised standard tomography method for asphalt pavements. Tomography provides, however, a non-destructive alternative to traditional, usually destructive, testing of drilled cores. Furthermore, tomography offers possibilities, which traditional laboratory analyses do not. It is not straightforward to distinguish mastic and aggregates in tomography results while air void content is less difficult to assess. To have a more reliable assessment of drilled cores properties found by tomography, the method must be carefully planned, executed, and the results compared to those of traditional laboratory methods. In this work, analysis was carried out using six in-situ drilled cores from a double layered porous asphalt pavement. This allowed a comparison of tomography and a standardised conventional laboratory air void measurement on the exact same samples. Comparisons of the air voids found by tomography in all three directions were also carried out, estimating how anisotropic and heterogeneous the samples are, which is not possible using traditional laboratory tests. As few as four tomography slices can give enough precision in the determination of air void content for the porous layers. No more than eight slices per sample were needed in the suggested tomography method. The statistical results did not indicate that the air void content determined by tomography is different from the laboratory results.

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Please use this url to cite or link to this publication:
author
; ; ; ; and
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
keywords
air void content, destructive test, non-destructive test, porous asphalt drilled cores, Tomography
host publication
Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2022
series title
Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2022
editor
Hoff, Inge ; Mork, Helge and Saba, Rabbira
pages
11 pages
publisher
CRC Press/Balkema
conference name
11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2022
conference location
Trondheim, Norway
conference dates
2022-06-08 - 2022-06-10
external identifiers
  • scopus:105009458525
ISBN
9781003222880
DOI
10.1201/9781003222880-5
language
English
LU publication?
yes
additional info
Publisher Copyright: © 2022 the Author(s).
id
722cbab1-b12f-41c6-bbb6-e973130e8657
date added to LUP
2026-02-03 16:15:36
date last changed
2026-02-03 16:16:45
@inproceedings{722cbab1-b12f-41c6-bbb6-e973130e8657,
  abstract     = {{<p>Tomography technology is not usual when investigating drilled asphalt cores properties. Currently, there is no internationally recognised standard tomography method for asphalt pavements. Tomography provides, however, a non-destructive alternative to traditional, usually destructive, testing of drilled cores. Furthermore, tomography offers possibilities, which traditional laboratory analyses do not. It is not straightforward to distinguish mastic and aggregates in tomography results while air void content is less difficult to assess. To have a more reliable assessment of drilled cores properties found by tomography, the method must be carefully planned, executed, and the results compared to those of traditional laboratory methods. In this work, analysis was carried out using six in-situ drilled cores from a double layered porous asphalt pavement. This allowed a comparison of tomography and a standardised conventional laboratory air void measurement on the exact same samples. Comparisons of the air voids found by tomography in all three directions were also carried out, estimating how anisotropic and heterogeneous the samples are, which is not possible using traditional laboratory tests. As few as four tomography slices can give enough precision in the determination of air void content for the porous layers. No more than eight slices per sample were needed in the suggested tomography method. The statistical results did not indicate that the air void content determined by tomography is different from the laboratory results.</p>}},
  author       = {{Vieira, T. and Lundberg, J. and Eriksson, O. and Guarin, A. and Gong, S. and Erlingsson, S.}},
  booktitle    = {{Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2022}},
  editor       = {{Hoff, Inge and Mork, Helge and Saba, Rabbira}},
  isbn         = {{9781003222880}},
  keywords     = {{air void content; destructive test; non-destructive test; porous asphalt drilled cores; Tomography}},
  language     = {{eng}},
  pages        = {{48--58}},
  publisher    = {{CRC Press/Balkema}},
  series       = {{Proceedings of the 11th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCRRA 2022}},
  title        = {{Evaluation air void content of drilled porous asphalt mixture cores using non-destructive X-ray computed tomography}},
  url          = {{http://dx.doi.org/10.1201/9781003222880-5}},
  doi          = {{10.1201/9781003222880-5}},
  year         = {{2022}},
}