Bridges, whether they are built from concrete or steel, have one common requirement: they need to be protected against environmental influences, eg water, salt, carbonation process providing a sufficiently long service life in order to justify the construction costs. Protection can be provided by waterproofing bridge deck felts in combination with selected asphalt types. Bridge deck felts should comply with requirements (eg ageing resistance) in relation to the high temperatures during application of the asphalt as well as with elastic properties and sufficient shear resistance during service life. A specially designed high vinyl content SBS type of KRATON polymer, KRATON D-KX-220, was found to provide the necessary properties to meet the rather stringent requirements. To deal with the flexibility of particularly steel decks, the asphalt should either provide high stiffness with low temperature susceptibility or be sufficiently flexible to follow the deflections of the bridge deck. Due to its improved flexibility, KRATON D-1101 modified asphalt concrete provides a better performance than obtained with traditional mastic asphalt. Further, it improves the performance at low (thermal cracking) and high temperatures (permanent deformation). (A) For the covering abstract see ITRD E104747.


  • English

Media Info

  • Features: References;
  • Pagination: p. 83-91

Subject/Index Terms

Filing Info

  • Accession Number: 00792974
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 83-907304-7-2
  • Files: ITRD
  • Created Date: May 31 2000 12:00AM