Estimation of low-temperature cracking in asphalt concrete pavements using an acoustic emission approach

Behzad Benia, William G. Buttlar, Henrique Reis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

An acoustic emission (AE) approach to evaluate low-temperature cracking susceptibility of asphalt binders and asphalt concrete mixtures is presented. Thin films of asphalt binders were bonded to granite substrates and exposed to temperatures ranging from 15°C to-50°C. Differential thermal contraction between granite substrates and asphalt binders induces progressive higher thermal stresses in the binders resulting in the thermal crack formation, which is accompanied by a release of elastic energy in the form of transient stress waves (AE). Assuming the cracking temperature (Tcr) to be the temperature at which AE signal energy exceeds a pre-selected threshold energy level, this AE testing approach was found to be sensitive and repeatable for predicting cracking temperatures (Tcr) in asphalt binders and asphalt concrete mixtures. These AE-based Tcr predictions showed strong correlations (R2=0.9) with predictions based upon ASSHTO TP1 and with ASSHTO MP1A protocols. Similar results were also obtained when asphalt concrete mixtures samples (both laboratory and field samples) were exposed to temperatures ranging from 15°C to -50°C.

Original languageEnglish (US)
Title of host publicationSAMPE Baltimore 2015 Conference and Exhibition
PublisherSoc. for the Advancement of Material and Process Engineering
ISBN (Electronic)9781934551196
StatePublished - Jan 1 2015
EventSAMPE Baltimore 2015 Conference and Exhibition - Baltimore, United States
Duration: May 18 2015May 21 2015

Publication series

NameInternational SAMPE Technical Conference
Volume2015-January

Other

OtherSAMPE Baltimore 2015 Conference and Exhibition
CountryUnited States
CityBaltimore
Period5/18/155/21/15

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

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