Abstract
In 1995, the Kentucky Transportation Cabinet let three experimental maintenance-painting projects. Two involved the painting of multiple bridges along interstate routes. The third project entailed the painting of a single steel truss bridge. All of the bridges had existing lead-based paint. Surface preparation procedures were specified that were intended to avoid generation of hazardous wastes. However, to provide more efficient cleaning of the existing paint, the washing pressure on the three projects was increased over previous experimental projects. Polyurethane paints were employed on all three projects. The projects began in the spring of 1995 and were completed that fall. No major problems were encountered on any of the projects. From 1996 through 1999, Kentucky Transportation Center researchers monitored the performance of the experimental coating systems. In general, these experimental projects were successful, as they have performed reasonably well and they met their primary goal of low initial project costs. The polyurethane coating applied during these projects will weather much slower than the alkyd systems they covered. They will inhibit the alkyds from further weathering and retain them on the bridges allowing the lead-based primers to continue protecting the steel.
Paper version not known (
Free)
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call