Chloride Penetration Resistance of a Ternary Blend Lightweight Concrete Bridge Deck
Publication: Journal of Performance of Constructed Facilities
Volume 28, Issue 4
Abstract
In 2010, the Tennessee Department of Transportation (TDOT) launched a bridge rehabilitation project to rerate all truss bridges with gusset plate connections due to the federal mandate after the Minneapolis bridge collapse in 2005. One bridge that needed to be renovated was the Hurricane Bridge in Dekalb County, Tennessee. To provide a durable bridge deck and meet the latest highway loading specifications, TDOT used a Class L ternary (sand-lightweight ternary) mix instead of their standard Class D (normal weight nonternary) bridge deck mix. While placing a section of the deck, TDOT would cast cylinders to send to the University of Tennessee for rapid chloride penetration (RCP), surface resistivity (SR), and compressive strength testing. Previous RCP and SR testing of the TDOT Class D mix found that the mix provides poor to moderate chloride ion penetration resistance. Research reported herein supports the use of the TDOT Class L ternary mix as an alternative to the TDOT Class D mix in order to increase bridge deck durability. The results of the Class L ternary mix cylinder testing show a decrease in chloride ion penetration, an increase in surface resistivity, higher compressive strengths, and a higher correlation between SR and RCP than Class D cylinders.
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Acknowledgments
Special thanks are extended to TDOT for their continued interest and financial support. In particular, we thank Mr. Ed Wasserman, retired Director of TDOT’s Structures Division, for all of his considerable effort in transporting the test cylinders. In addition, TDOT personnel and participating concrete producers deserve special mention because of their willingness to go above and beyond their job duties to ensure proper care and transportation of samples. Any opinions expressed herein are those of the authors and not necessarily those of TDOT.
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Information & Authors
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Published In
Journal of Performance of Constructed Facilities
Volume 28 • Issue 4 • August 2014
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Mar 5, 2013
Accepted: Jul 29, 2013
Published online: Jul 31, 2013
Published in print: Aug 1, 2014
Discussion open until: Oct 20, 2014
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