The Virginia smart road: The impact of pavement instrumentation on understanding pavement performance

Imad L. Al-Qadi, Amara Loulizi, Mostafa Elseifi, Samer Lahouar

Research output: Contribution to journalConference articlepeer-review

Abstract

The instrumentation used at the Virginia Smart Road to measure flexible pavement response to loading was presented. The measured horizontal transverse and longitudinal strains induced in the hot-mix asphalt (HMA) during compaction with a steel drum compactor both with and without vibrations were presented. HMA was subjected to very high horizontal strains during compaction, especially when vibration is used. A Haversine equation well represented the measured normalized vertical compressive stress pulse for a moving vehicle. Haversine duration times varied from 0.02 sec for a vehicle speed of 70 km/hr at a depth of 40 mm to 1 sec for a vehicle speed of 10 km/hr at a depth of 597 mm. Temperature significantly affected the measured vertical compressive stress and measured horizontal transverse strain under the HMA layer. Although speed did not affect the magnitude of the measured vertical compressive stress, it affected the loading time. On the other hand, speed significantly affected the measured horizontal transverse strain under the HMA layer. Variation in tire inflation pressure from 552 to 724 kPa did not affect the measured vertical compressive stress and the measured horizontal transverse strain at the bottom of the HMA layer. This is an abstract of a paper presented at the Association of Asphalt Paving Technologists 2004 Technology Sessions (Baton Rouge, LA 3/10-18/2004).

Original languageEnglish (US)
Pages (from-to)427-465
Number of pages39
JournalAsphalt Paving Technology, AAPT
StatePublished - Dec 1 2004
Externally publishedYes
EventAssociation of Asphalt Paving Technologists - Proceedings of the Technology Sessions, AAPT 2004 - Baton Rouge, LA, United States
Duration: Mar 8 2004Mar 10 2004

Keywords

  • Hot Mix Asphalt
  • Longitudinal Strains
  • Pavement Instrumentation

ASJC Scopus subject areas

  • Civil and Structural Engineering

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