ASPHALT PAVING FOR STEEL BRIDGE DECKS

Asphalt paving for steel bridge decks is subjected to millions of cycles of relatively high stresses under wheel loads. Resistance to fatigue cracking is therefore an important property. Composite action between the steel and asphalt is also important since the stiffness of the combined unit can help to reduce the fatigue effect of stresses in the welded structure. Mastic asphalt satisfies all the requirements of a bridge deck paving material to a tolerable degree. However, improvements in fatigue life and riding quality are urgently sought after. Epoxy hot rolled asphalt is currently the best alternative material and possesses very good properties when fully cured. However, there is still a lack of data on its properties when uncured or only partially cured. Stiffer waterproofing membranes would enhance the stiffness of the composite unit and should be beneficial in terms of fatigue performance also. Other polymer modified asphalts show promise but require further development.

Language

  • English

Media Info

  • Features: Figures; Photos; References; Tables;
  • Pagination: p. 555-572
  • Serial:
    • Volume: 56

Subject/Index Terms

Filing Info

  • Accession Number: 00739809
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Aug 29 1997 12:00AM