REFLECTIVE CRACKING IN BRIDGE DECK SURFACINGS OF ASPHALT

Already existent or developing cracks in reinforced concrete bridge decks induced by temperature changes and traffic loads must be adequately covered to provide long-term protection of the structure from the ingress of water and hence against corrosion. That is why flexible sheets or membranes are applied to asphalt bridge deck surfacings which have crack bridging features. Since 1987 several types of asphalt surfacings have been employed in the Federal Republic of Germany where the waterproof and crack bridging membrane consisting on one or two bitumen sheets or of a liquid polymer resin is directly integrated into the bridge deck surfacing providing for a permanent adhesion bond between the asphaltic surface and the reinforced concrete of the deck. This method has proved to be reliable and has in recent years reduced the maintenance costs of the altogether about 35,000 bridges in Germany. In order to investigate the performance of such crack bridging surfacings, extensive long-term laboratory tests were carried out in the Federal Institute for Materials Research and Testing (BAM). A model was developed taking the interaction of the entire system, i.e. concrete - waterproof and crack bridging membrane - asphaltic protection layer into account. On the one hand this model enables us to quantify the influence of the layered structure of the system and the nature and thickness of the coating layers used on the crack bridging properties of the bridge deck surfacing system and on the other hand to predict the development of reflective cracking in practice. For the covering abstract see ITRD E109276.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/2912143144
• Corporate Authors:

  RILEM PUBLICATIONS

  61 AVENUE DU PRESIDENT WILSON
  CACHAN CEDEX,   France  F-94235
• Authors:
  • VATER, E J
• Conference:
  • REFLECTIVE CRACKING IN PAVEMENTS - RESEARCH IN PRACTICE. PROCEEDINGS OF THE 4TH INTERNATIONAL RILEM CONFERENCE, 26-30 MARCH 2000, OTTAWA, CANADA
• Publication Date: 2000

Language

• English

Media Info

• Features: References;
• Pagination: p. 331-41

Subject/Index Terms

• TRT Terms: Bituminous materials; Bridge decks; Cracking; Prevention; Reinforced concrete; Surfacing
• ITRD Terms: 4955: Bituminous materials; 3482: Bridge deck; 5211: Cracking; 9149: Prevention; 4794: Reinforced concrete; 2972: Surfacing
• Subject Areas: Security and Emergencies;

Filing Info

• Accession Number: 00812949
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• ISBN: 2-912143-14-4
• Files: ITRD, ATRI
• Created Date: Jul 2 2001 12:00AM