PROTECTION EFFECTIVENESS OF THE WATERPROOF MEMBRANE SYSTEMS OF BRIDGE DECKS IN LOUISIANA
The effects of de-icing salts on concrete and reinforcing steel is well documented, and efficient methods of protection from the penetrating chloride ions have long been sought. Concrete bridge decks need the protection, and waterproofing the concrete appears to be the answer. 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. /FHWA/
- Conducted in cooperation with the Department of Transportation, Federal Highway Administration.
Louisiana Department of Transportation and Development1201 Capitol Access Road, P.O. Box 94245
Baton Rouge, LA USA 70804-9245
- Ross, J E
- Law, S M
- Publication Date: 1978-12
- Pagination: 91 p.
- TRT Terms: Bridge decks; Chlorides; Concrete; Deicing chemicals; Electrical resistivity; Measures of effectiveness; Reinforcing steel; Waterproofing; Waterproofing materials
- Uncontrolled Terms: Effectiveness; Membranes
- Old TRIS Terms: Membranes (Biology); Resistivity
- Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials;
- Accession Number: 00300463
- Record Type: Publication
- Source Agency: National Technical Information Service
- Report/Paper Numbers: FHWA-LA-78-121 Final Rpt.
- Contract Numbers: Study No. 75-2C
- Files: TRIS, STATEDOT
- Created Date: Sep 29 1979 12:00AM