Importance of Invasive Measures in Assessment of Existing Pavements
Publication: Journal of Performance of Constructed Facilities
Volume 14, Issue 4
Abstract
Countless miles of aged interstate highway pavement in the United States and significant expenditures associated with reconstruction highlight the importance of cost-effective rehabilitation measures. However, the prescription of ill-posed rehabilitation strategies due to improper assessment can be costly. This paper details a forensic investigation of a 22.5-km (14-mi) stretch of interstate highway in Oklahoma, consisting of multiple asphalt concrete (AC) overlays accumulated over a 40-year period. A thorough nondestructive investigation was carried out using falling weight deflectometer testing and ground penetrating radar. This was followed by a detailed invasive investigation involving coring, drilling and sampling, laboratory testing, and trenching. The pavement profile deduced from nondestructive test results alone failed to reveal a significantly weakened subsurface AC layer that was clearly revealed during invasive testing. Mechanistic analysis of the perceived pavement and actual pavement profiles reveal a significant difference in fatigue life. The reliance on nondestructive testing alone for pavement analysis and rehabilitation design would have been in significant error.
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Information & Authors
Information
Published In
Journal of Performance of Constructed Facilities
Volume 14 • Issue 4 • November 2000
Pages: 149 - 154
History
Received: Jan 13, 2000
Published online: Nov 1, 2000
Published in print: Nov 2000
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