Flexolith Overlay: Experimental Feature WA 84-02, Post Construction Report

This report describes the installation and post-construction evaluation of a thin, lightweight epoxy concrete bridge deck overlay. This subject "Flexolith" epoxy concrete system was installed by Dural International Corporation on a bridge located on I-82 near Ellensburg, Washington.

The application of the overlay was unique in both the use of a special machine which mixed the epoxy components with the aggregates and the use of a vibratory screed to distribute and level the epoxy concrete to the desired depth. A small segment of the overlay, however, was placed using the more common broom and seed method of installation.

Post-construction testing showed that the overlay has adequate bond strength, extremely high friction resistance, and is performing adequately as a waterproof membrane. The only deficiencies noted were a non-uniform surface texture and profile. A recommendation was made to not allow the use of the vibratory screed method until improvements are made to insure that the final product will have a surface texture and profile equivalent to overlays placed with the broom and seed method.


Publication Date: 
Sunday, February 1, 1987
Publication Number: 
WA-RD 107.1
Last modified: 
10/12/2016 - 15:42
Keith W. Anderson.
Washington (State). Dept. of Transportation.
Number of Pages: 
Bond strength (Materials), Bridges, Epoxy coatings, Evaluation, Floors, Friction, Maintenance, Overlays (Pavements), Pavements.