The Protection Effectiveness of Waterproof Membrane Systems on Bridge Decks in Louisiana.

摘要

The aim of this research study was to evaluate the effectiveness of certain concrete bridge deck waterproofing membranes under conditions that prevail in Louisiana. This study included research evaluation of experimental installations on an exit ramp and a bridge on the Interstate highway in North Louisiana,as well as laboratory evaluations of the membrane systems. Laboratory evaluations included the tension test,bend test,heat-aged bend test and the electrical resistivity test. Field evaluations included visual observations and electrical resistivity tests. Installation procedures were monitored closely and a diary was kept of all activity. The primary conclusion reached on the study was that,using the electrical resistivity as the chief test for waterproofing ability,all the membrane systems evaluated in the field failed to achieve total impermeability of the concrete bridge deck. The primary recommendation of this research report is that the State of Louisiana not accept the concrete bridge deck waterproofing membrane systems herein for use as 100% waterproofing materials on concrete decks.