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Moisture Sensitivity of Asphalt Mixtures using Cycling Pore Pressure Conditioning

Sulejmani, Pajtim LU ; Said, Safwat ; Agardh, Sven LU and Ahmed, Abubeker (2019) In Transportation Research Record 2673(2). p.294-303
Abstract

One of the major causes of premature failure in asphalt pavements is moisture damage. Asphalt mixtures designed without considering climate impacts may suffer from durability problems caused by movement of water inside the asphalt mixture. Rolling traffic over wet pavement builds up pore pressure in the mixture, which will consequently accelerate deterioration. The objective of the study was to assess the moisture damage to asphalt concrete mixtures by means of complex modulus testing of dry and moisture-conditioned asphalt specimens with various mixture compositions. The asphalt mixtures were conditioned with the Moisture Induced Sensitivity Tester (MIST), which aims to replicate pore pressure in field conditions. The results showed a... (More)

One of the major causes of premature failure in asphalt pavements is moisture damage. Asphalt mixtures designed without considering climate impacts may suffer from durability problems caused by movement of water inside the asphalt mixture. Rolling traffic over wet pavement builds up pore pressure in the mixture, which will consequently accelerate deterioration. The objective of the study was to assess the moisture damage to asphalt concrete mixtures by means of complex modulus testing of dry and moisture-conditioned asphalt specimens with various mixture compositions. The asphalt mixtures were conditioned with the Moisture Induced Sensitivity Tester (MIST), which aims to replicate pore pressure in field conditions. The results showed a decline in stiffness modulus and a reduction in elastic properties after MIST conditioning. In addition, the results indicated that binder content and air void content had a significant influence on the reduction in stiffness. To capture the relationship between air void content, binder content, and the reduction in stiffness, a relationship was developed and validated with measurements on cores extracted in the field.

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Please use this url to cite or link to this publication:
author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Transportation Research Record
volume
2673
issue
2
pages
294 - 303
publisher
Transportation Research Board, Washington DC, USA
external identifiers
  • scopus:85060931057
ISSN
0361-1981
DOI
10.1177/0361198118823496
language
English
LU publication?
yes
id
ce8045f1-4a24-4473-be60-a61ea2e3949a
date added to LUP
2019-02-12 12:01:15
date last changed
2022-04-25 21:10:37
@article{ce8045f1-4a24-4473-be60-a61ea2e3949a,
  abstract     = {{<p>One of the major causes of premature failure in asphalt pavements is moisture damage. Asphalt mixtures designed without considering climate impacts may suffer from durability problems caused by movement of water inside the asphalt mixture. Rolling traffic over wet pavement builds up pore pressure in the mixture, which will consequently accelerate deterioration. The objective of the study was to assess the moisture damage to asphalt concrete mixtures by means of complex modulus testing of dry and moisture-conditioned asphalt specimens with various mixture compositions. The asphalt mixtures were conditioned with the Moisture Induced Sensitivity Tester (MIST), which aims to replicate pore pressure in field conditions. The results showed a decline in stiffness modulus and a reduction in elastic properties after MIST conditioning. In addition, the results indicated that binder content and air void content had a significant influence on the reduction in stiffness. To capture the relationship between air void content, binder content, and the reduction in stiffness, a relationship was developed and validated with measurements on cores extracted in the field.</p>}},
  author       = {{Sulejmani, Pajtim and Said, Safwat and Agardh, Sven and Ahmed, Abubeker}},
  issn         = {{0361-1981}},
  language     = {{eng}},
  month        = {{01}},
  number       = {{2}},
  pages        = {{294--303}},
  publisher    = {{Transportation Research Board, Washington DC, USA}},
  series       = {{Transportation Research Record}},
  title        = {{Moisture Sensitivity of Asphalt Mixtures using Cycling Pore Pressure Conditioning}},
  url          = {{http://dx.doi.org/10.1177/0361198118823496}},
  doi          = {{10.1177/0361198118823496}},
  volume       = {{2673}},
  year         = {{2019}},
}