Journal Published Online: 28 June 2013
Volume 41, Issue 5

Investigation of Delamination on I-65 in Indiana



This paper presents an investigation of delamination on the northbound driving lane of I-65 near Brookston, IN, utilizing field pull-off tests to evaluate interface bonding strength. In addition, ultrasonic test, asphalt binder test, and mix property (mechanical and volumetric) tests [i.e., dynamic shear rheometer (DSR) test, asphalt binder extraction, binder content, sieve analysis, and mix specific gravities] were conducted to explore the cause(s) of delamination. The pull-off test results showed that the delaminated pavement had a weaker interface bond, which generated more top-down fatigue cracking. In addition, the delaminated pavement contained more aged asphalt binder and a higher percentage of air voids, which could have accelerated top-down fatigue cracking as well. In conclusion, the causes of delamination were a combination of weak interface bonding and asphalt mix durability of the surface course.

Author Information

Lee, Jusang
Indiana Dept. of Transportation, West Lafayette, Indiana, US
Ahn, Hyungjun
Purdue Univ., West Lafayette, Indiana, United States of America
Shah, Ayesha
North Central Superpave Center, College of Engineering, West Lafayette, Indiana, US
Sommer, Kurt
Indiana Dept. of Transportation, West Lafayette, Indiana, US
Pages: 9
Price: $25.00
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Stock #: JTE20120020
ISSN: 0090-3973
DOI: 10.1520/JTE20120020