Accession Number:

ADA470955

Title:

Evaluation Criteria for Aged Asphalt Concrete Surfaces

Descriptive Note:

Final rept.

Corporate Author:

ENGINEER RESEARCH AND DEVELOPMENT CENTER VICKSBURG MS GEOTECHNICAL AND STRUCTURES LAB

Personal Author(s):

Report Date:

2007-06-01

Pagination or Media Count:

73.0

Abstract:

An evaluation of aged asphalt concrete AC was performed during the period February to December 2006 at the Vicksburg Airport Vicksburg, MS, Hood Army Airfield and Robert Gray Army Airfield Fort Hood, TX, Lawson Army Airfield Fort Benning, GA, Cairns Army Airfield Fort Rucker, AL, Butts Army Airfield Fort Carson, CO, and Kandahar Airfield Kandahar, Afghanistan to develop a method for predicting the performance of aged AC surfaces in situ. A portable seismic pavement analyzer PSPA was used on the in situ AC pavements to determine the pavement modulus. The aged AC samples obtained from the military airfields were brought to the U.S. Army Engineer Research and Development Center for further laboratory testing. Various asphalt mixture and binder properties were determined from the samples, indirect tensile strength tests were run on core samples, and beam fatigue tests were performed on beam samples. The results from this study were used to develop adjustments to the current Department of Defense DoD fatigue criterion for the purpose of improving fatigue life predictions for aged AC surfaces. Aged AC surfaces are considered to be 10 years old or older. The most accurate adjustment to the current DoD criterion required both asphalt modulus from PSPA and binder stiffness from dynamic shear rheometer as input.

Subject Categories:

  • Ceramics, Refractories and Glass
  • Construction Equipment, Materials and Supplies

Distribution Statement:

APPROVED FOR PUBLIC RELEASE