A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Moving Load Test on Experimental Prestressed Concrete Highway Slab. Part B. Additional Investigations
An investigation was made to determine the loss in prestress in the experimental prestressed concrete highway slab, to determine the extent to which bonding of the strands had been accomplished during the grouting operation and to investigate the effects of corrosion on the strands. The investigation was performed about eight years after the pavement was constructed and two years after it was subjected to the moving load tests. Longitudinal cracks had developed over some of the tendons as a result of the moving load tests. Two of these cracks were in the area covered by the present investigation. The test indicated that there was a loss in prestress in the pavement of about 14 percent. Bond failure occurred between the conduit and the pavement when longitudinal cracks along the conduit were forced open. The developed bond strength between the strands and the grout was about 421 psi. Corrosion covered approximately 30 percent of the surface area of the strands. The average breaking strength of the strands was about 27,200 pounds. The investigation demonstrated that there was adequate bond developed between the grouted tendons and the concrete to transfer the prestressing loads when transverse cuts are made.
Moving Load Test on Experimental Prestressed Concrete Highway Slab. Part B. Additional Investigations
An investigation was made to determine the loss in prestress in the experimental prestressed concrete highway slab, to determine the extent to which bonding of the strands had been accomplished during the grouting operation and to investigate the effects of corrosion on the strands. The investigation was performed about eight years after the pavement was constructed and two years after it was subjected to the moving load tests. Longitudinal cracks had developed over some of the tendons as a result of the moving load tests. Two of these cracks were in the area covered by the present investigation. The test indicated that there was a loss in prestress in the pavement of about 14 percent. Bond failure occurred between the conduit and the pavement when longitudinal cracks along the conduit were forced open. The developed bond strength between the strands and the grout was about 421 psi. Corrosion covered approximately 30 percent of the surface area of the strands. The average breaking strength of the strands was about 27,200 pounds. The investigation demonstrated that there was adequate bond developed between the grouted tendons and the concrete to transfer the prestressing loads when transverse cuts are made.
Moving Load Test on Experimental Prestressed Concrete Highway Slab. Part B. Additional Investigations
J. R. Smith (author) / J. L. Evanko (author)
1965
42 pages
Report
No indication
English
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