One of the growing number of preventive bridge maintenance activities conducted by the Kentucky Transportation Cabinet (KYTC) is washing and applying thin film protective coatings to bridge abutments and piers. Previous work conducted by Kentucky Transportation Center (KTC) under KYSPR 10-406 documented increased chloride contamination of these bridge components and the need for protective coatings. KYTC Contract ID 162952 includes, among other tasks, cleaning and coating specific concrete elements of eighteen bridges in Anderson and Woodford counties (District 7). These elements are interior faces of the barrier walls, pier caps, and abutment seats. The contract was let on July 29, 2016, with the primary completion date as July 31, 2017. There were five bids that ranged from $326,870.61 to $810,645.00 with the engineering estimate as $475,155.08. The contract was awarded to the low bidder, M&M Services Co. Inc., on August 5, 2016.

Of the coating systems identified in KYSPR 12-433 and KYSPR 05-291 the contractor selected the PPG Amerlock 2/Devoe Devflex HP system. Most of the systems were identified by laboratory testing with limited field application. This study focused on monitoring and documenting surface preparation, coating application, and field performance to determine the potential for use on future projects and possible inclusion of the coating on a List of Approved Materials for Concrete Coatings.

Six of the eighteen bridges in this contract were monitored, and critical elements in the overall process were assessed and documented. This included initial substrate condition, surface preparation, application method, applied film conditions (e.g., thickness, continuity), and weather conditions.

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© 2017 University of Kentucky, Kentucky Transportation Center

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The contents of this report reflect the views of the authors, who are responsible for the facts and accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the University of Kentucky, the Kentucky Transportation Center, the Kentucky Transportation Cabinet, the United States Department of Transportation, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. The inclusion of manufacturer names or trade names is for identification purposes and should not be considered an endorsement.