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TWENTY-FIVE-YEAR PERFORMANCE HISTORY OF INTERLAYER MEMBRANES ON BRIDGE DECKS IN KANSAS.
| 题名： | TWENTY-FIVE-YEAR PERFORMANCE HISTORY OF INTERLAYER MEMBRANES ON BRIDGE DECKS IN KANSAS. |
| 作者： | Wojakowski-J; Hossain-M |
| 关键词： | BRIDGE-DECKS; KANSAS-; INTERLAYER-MEMBRANES; MONITORING-; ELECTRICAL-RESISTIVITY; VISUAL-SURVEYS; DISTRESS-; PERFORMANCE-; CONDITION-SURVEY; MAINTENANCE-; TRAFFIC-VOLUME; NONWOVEN-MATERIAL; POLYPROPYLENE-; WEARING-COURSE; COAL-TARS; LIQUID-MEMBRANES |
| 摘要： | Interlayer membranes installed on six different bridge decks in Kansas were monitored for the last 20 to 25 years. Electrical resistivity measurements and visual distress surveys were made on these bridge decks in 1982 and 1991. The visual distress surveys were supplemented by the condition rating and maintenance history data from the Bridge Management System data base of the Kansas Department of Transportation (KDOT). The membranes installed represented the preformed system, liquid/preformed system, and liquid system. Electrical resistivity measurements taken in 1991 were compared with those obtained in 1982. The results show that the general performance of interlayer membranes installed between 1967 and 1971 has decreased since the last evaluation in 1982. However, the amount of traffic carried by some of these decks has increased considerably. Two bridge deck membranes that have performed most effectively for the last 20 to 25 years were both liquid/preformed systems. These membranes were nonwoven polypropylene fabrics with an asphaltic overlay placed as a wearing surface. The lives of a coal tar-modified polyurethane elastomer interlayer membrane and a nonwoven polypropylene fabric system on a very old bridge have been exhausted. The poorest performance was obtained from a preformed polypropylene and coal tar sheet system and a liquid membrane system. In the recent past, KDOT used membranes as part of the maintenance overlays in which weight restrictions could not support concrete overlays. The agency now uses dense concrete/silica-fume concrete bridge decks during new construction. |
| 总页数： | Transportation Research Record. 1995. (1476) pp180-187 (1 Fig., 8 Tab., 6 Ref.) |
| 报告类型： | 科技报告 |
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