It was noted that additional hair-line cracks have appeared since the original crack survey was made. Many of the new cracks are extensions of existing cracks and parallel to each other. Some cracks are parallel with the reinforcing steel while others are diagonal to the steel. At the time of this crack survey, highway traffic had not been on the structures due to present construction on the grading portion of this project. The south-bound structure has received truck traffic hauling concrete for the concrete surfacing of the roadway south of the bridge. The loaded trucks were hauling legal loads of approximately 56,000 lbs. gross weight. Resistivity readings for both structures were obtained. The readings are somewhat better than would be expected from a continuous membrane seal. If the resistivity readings fluctuate or decrease in the future, then the electrical half-cell test should be incorporated into the testing to monitor the corrosion of the steel. The 90 day laboratory salt bath and the dye penetration tests have been completed with the test results listed. The 90 day salt bath did not show extensive salt concentration below the 1/2" level. The dye did not penetrate the Wax Bead Concrete or the Class 40 Concrete cores. (Author)

  • Corporate Authors:

    Idaho Transportation Department

    3311 W State Street, P. O. Box 7129
    Boise, ID  United States  83707-1129
  • Authors:
    • ROSS, J D
    • VAN OVER, L E
  • Publication Date: 1980-8

Media Info

  • Features: Appendices; Figures; Tables;
  • Pagination: 12 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00324465
  • Record Type: Publication
  • Report/Paper Numbers: Project 77-04-06 Intrm Rpt.
  • Created Date: Apr 15 1981 12:00AM