DESIGN AND CONSTRUCTION OF ASPHALTIC BRIDGE PAVEMENTS IN GERMANY

THE STRESSES TO WHICH BRIDGE PAVING SYSTEMS ARE SUBJECTED TO ENDURE THE BRIDGE OSCILLATIONS AND THE STRESSES ORIGINATING FROM MORE RAPID TEMPERATURE CHANGES ARE DISCUSSED. THE PAVINGS ARE REQUIRED TO HAVE HIGH STABILITY COMBINED WITH GREAT PLASTICITY AND HIGH DURABILITY UNDER VARYING STRESSES. A MULTI-LAYER SYSTEM IS ADVISABLE IN VIEW OF THE SAFETY OF THE BRIDGE AND THE REQUIREMENTS OF THE TRAFFIC. THE COURSES ARE INSULATED COURSE, INTERMEDIATE PROTECTIVE COURSE AND WEARING COURSE. THE METHODS USED MUST BE TAILORED TO THE SPECIFIC NEEDS OF BOTH THE BRIDGE AND THE TRAFFIC. USUAL METHODS FOR CONCRETE BRIDGES ARE THOSE WHICH INCORPORATE SEPARATOR, INSULATION, INTERMEDIATE COURSE AND SURFACE COURSE. THE SEPARATOR MOSTLY CONSISTS OF PERFORATED OR NON-PERFORATED GLASS FIBER MATERIAL, THE INSULATION OF MASTIC OR METAL FOILS, THE PROTECTIVE COURSE OF GUSSASPHALT AND THE WEARING COURSE OF EITHER GUSSASPHALT OR ASPHALTIC CONCRETE. THE INSULATION FOR STEEL BRIDGES MUST HAVE A FULL- PHASE TYPE BOND WITH THE STEEL DECKING. THE INSULATION MAY BE EITHER MASTIC, METAL FOILS, OR HOT-SPRAYED BONDING COMPOSITIONS. PROTECTIVE COURSE AND WEARING COURSE ARE THE SAME AS FOR CONCRETE BRIDGES. METHODS FOR ELIMINATING THE SEPARATOR ARE PRESENTLY BEING TRIED IN GERMANY. THESE PROVIDE THAT ALL LAYERS ARE BONDED TOGETHER AND, MOST IMPORTANT, THE INSULATION IS BONDED TO THE DECKING. THE DIFFICULTIES TO BE OVERCOME IN STEEL BRIDGES ARE TO OBTAIN THE REQUIRED FATIGUE STRENGTH AGAINST DEFLECTIONS AND THE NECESSARY SHEAR RESISTANCE. THOSE TO BE OVERCOME FOR CONCRETE DECKINGS ARE BOND FAILURE AND BLISTERING. FOR CONCRETE BRIDGES, THE DEVELOPMENT TREND IS TO DESIGN THE INSULATION SO THAT IT TAKES UP AND ELIMINATES WATER VAPOR PRESSURES BUT STILL MAINTAINS FULL-FACE BOND WITH THE CONCRETE DECKING. ADDITIONAL ANCHOR BARS ARE USED IN STEEL BRIDGES TO REDUCE DECK-PLATE DEFORMATIONS, AND TO PREVENT SHOVING OF THE PAVING. SPECIAL HOT-APPLIED BONDING COMPOSITIONS ARE USED TO PROVIDE 100 PER CENT SHEAR- RESISTING BOND. RUBBER, PLASTICS, AND ASBESTOS ARE BEING TRIED AS ADDITIVES TO IMPROVE THE CHARACTERISTICS OF THE PAVING MATERIALS.

• Supplemental Notes:
  • Vol 35, pp 587-611, 17 FIG
• Authors:
  • Zichner, G
• Conference:
  • Assoc Asphalt Paving Technol Proc
• Publication Date: 1966-2

Subject/Index Terms

• TRT Terms: Asphalt pavements; Blistering; Bridge decks; Concrete bridges; Electric insulating materials; Fatigue (Mechanics); Glass fibers; Insulating materials; Mastic asphalt; Metal bridges; Pavement design; Paving; Plasticity; Separators; Shear strength; Stability (Mechanics); Steel bridges; Strength of materials; Temperature gradients; Wearing course (Pavements)
• Uncontrolled Terms: Fatigue life
• Old TRIS Terms: Layered system mechanics; Mastics
• Subject Areas: Highways; Materials; Pavements;

Filing Info

• Accession Number: 00210778
• Record Type: Publication
• Files: TRIS
• Created Date: May 6 1994 12:00AM