EVALUATION OF INSULATION MATERIAL TO REDUCE PREMATURE ICING OF BRIDGE DECKS
THE RESULTS ARE SUMMARIZED OF TESTS DESIGNED TO EVALUATE THE EFFECTIVENESS OF INSULATING MATERIALS IN PREVENTING PREMATURE ICE FORMATION ON BRIDGE DECKS. VARYING THICKNESSES OF SPRAYED URETHANE FOAM WERE APPLIED TO THE UNDERSIDE OF THE DECKS OF TWO FOUR-SPAN CONTINUOUS STEEL BEAM BRIDGES. RELATIONSHIPS ARE ESTABLISHED BETWEEN THE FREQUENCY OF FREEZE-THAW CYCLES, PERCENT DURATION FROZEN, AND SEQUENCE OF FREEZING AND THAWING FOR THE APPROACH SLABS, CONTROL SECTIONS, AND INSULATED SECTIONS OF THE TWO BRIDGES. IN ADDITION, THE RELATIVE VALUE OF FIVE INSULATING MATERIALS HAVE BEEN STUDIED IN AN OUTDOOR LABORATORY PROGRAM UTILIZING 4-FOOT SQUARE BY 8-INCH THICK CONCRETE SLABS, SUPPORTED 4 FEET ABOVE THE GROUND. IMPORTANT CONCLUSIONS OF THIS STUDY ARE' 1. THE APPROACH SLAB HAD THE GREATEST NUMBER OF FREEZE- THAW CYCLES, FOLLOWED BY THE CONTROL BRIDGE, THE INSULATED BRIDGE AND THE AMBIENT AIR, IN THE ORDER OF DECREASING NUMBER OF CYCLES. 2. THE LARGEST DURATION FROZEN PERCENTAGE WAS OBSERVED IN THE AMBIENT AIR, FOLLOWED BY THE CONTROL BRIDGE, THE APPROACH SLAB AND THE INSULATED BRIDGE. /BPR/
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Supplemental Notes:
- Hps-hpr1/33/, SEP64
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Corporate Authors:
Ohio State University, Columbus
190 North Oval Drive
Columbus, OH United States 43210 -
Authors:
- Yeginobali, A
- Publication Date: 1964-9
Subject/Index Terms
- TRT Terms: Beams; Bridge approaches; Bridge decks; Concrete; Continuous structures; Deicing; Electric insulating materials; Evaluation; Foams; Freeze thaw tests; Icing; Insulating materials; Laboratory tests; Metal bridges; Plastic foams; Retarders (Chemistry); Slabs; Steel bridges; Test sections; Urethane
- Uncontrolled Terms: Continuous beams
- Old TRIS Terms: Control structures; Underside
- Subject Areas: Bridges and other structures; Geotechnology; Highways; Materials;
Filing Info
- Accession Number: 00207725
- Record Type: Publication
- Source Agency: Bureau of Public Roads /US
- Files: TRIS
- Created Date: Sep 1 1994 12:00AM