Testing asphalt concrete in diametral tension-compression

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Abstract

Testing of asphalt concrete in diametral tension-compression is suggested. Given that asphaltic layers experience stress reversals in the field, the underlying motivation is reducing systematic characterization errors. The required experimental setup is shown to be composed of usual testing gear with slight modifications. It is described in detail, validated on an aluminum disk, and then demonstrated for an asphalt concrete specimen. The application of force history that includes several load-unload-rest cycles is advocated. So doing allows separation of the measured response into recoverable and irrecoverable components with only the former being consistent with viscoelastic solid behavior. Reversing the direction of applied force is also beneficial; it effectively confines the accumulation of irrecoverable deformations to a narrow 'band', thereby protecting the mechanical integrity of the specimen. The resulting directional differences in mechanical behavior are demonstrated.
Original languageEnglish
Title of host publicationAsphalt Pavements
Number of pages11
Volume2
Publication date2014
Pages1673-1683
Chapter157
Publication statusPublished - 2014
Externally publishedYes
Event12th ISAP Conference on Asphalt Pavements - Raleigh, NC, United States
Duration: 1 Jun 20145 Jun 2014
Conference number: 12
http://www.ncsu.edu/mckimmon/cpe/opd/ISAP/index.html

Conference

Conference12th ISAP Conference on Asphalt Pavements
Number12
CountryUnited States
CityRaleigh, NC
Period01/06/201405/06/2014
Internet address
SeriesAsphalt Pavements, Vols 1 and 2

Keywords

  • Asphalt concrete
  • Linear viscoelasticity
  • Diametral tension
  • Diametral compression
  • Material characterization

Cite this

Levenberg, E. (2014). Testing asphalt concrete in diametral tension-compression. In Asphalt Pavements (Vol. 2, pp. 1673-1683). Asphalt Pavements, Vols 1 and 2