Use of Wicking Fabric to Help Prevent Frost Boils in Alaskan Pavements
Publication: Journal of Materials in Civil Engineering
Volume 26, Issue 4
Abstract
Beaver Slide is on the Dalton Highway near 177.8 km (110.5 mi), and it is downhill when heading north. The road gradient is approximately 11% and the road prism is on a side hill. Each year, there are soft spots that usually appear in late April and remain all summer, which are also called “frost boils” by engineers at the Alaska Department of Transportation and Public Facilities (AKDOT&PF). The frost boils have resulted in extremely unsafe driving conditions and frequent accidents. Past repair efforts indicate conventional road construction methods do not work. A new type of geosynthetic wicking fabric has been recently developed that has a high specific surface area (consequently high wettability and high capillary action) and high directional permittivity. Preliminary laboratory tests indicate it has great promise as a cost-effective means to solve the frost heave-related problems on northern road systems. This study verifies the effectiveness of the wicking fabric to mitigate frost boils in Alaskan pavements. A test section was built at the Beaver Slide area of the Dalton Highway with installation of two layers of wicking fabric. The test section was instrumented with moisture and temperature sensors to measure the temperature and moisture variations for two years. Results were analyzed to evaluate the effectiveness of the wicking fabric to mitigate the frost boils in Alaskan pavements.
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Acknowledgments
The research presented in this paper was part of a study on Use of Wicking Fabric to Prevent Frost Boils in the Dalton Highway Beaver Slide Area, Alaska sponsored by TENCATE GEOSYNTHETICS (North America), AKDOT&PF, and Alaska University Transportation Center. The authors gratefully acknowledge them for their financial support.
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Information & Authors
Information
Published In
Journal of Materials in Civil Engineering
Volume 26 • Issue 4 • April 2014
Pages: 728 - 740
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Dec 4, 2012
Accepted: Apr 2, 2013
Published online: Mar 14, 2014
Published in print: Apr 1, 2014
Discussion open until: Aug 14, 2014
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