MOVING LOAD TEST ON EXPERIMENTAL PRESTRESSED CONCRETE HIGHWAY SLAB

THIS INVESTIGATION WAS INITIATED TO DETERMINE THE BEHAVIOR OF AN EXPERIMENTAL PRESTRESSED SLAB WHEN SUBJECTED TO MOVING LOADS OVER AN EXTENDED PERIOD OF TIME. DETAILS OF THE DESIGN AND CONSTRUCTION OF THE SLAB AND THE RESULTS OF STATIC AND CREEP LOAD TESTS WERE REPORTED PREVIOUSLY. THE TESTS WERE CONDUCTED ON A 75-FT LENGTH OF THE SLAB WHICH INCLUDED A RUBBER EXPANSION JOINT. THE LOAD WAS APPLIED BY A SPECIALLY DESIGNED VEHICLE HAVING AXLES SPACED 20 FT APART AND CARRYING 14 TONS EACH. THE VEHICLE WAS POSITIONED ON THE SLAB SO THAT THE CURB WHEELS TRAVELED IN A STRAIGHT LINE ABOUT 6 IN. FROM THE EDGE OF THE SLAB. DETERMINATION OF THE LONGITUDINAL AND TRANSVERSE STRESSES, DEFLECTION OF THE SLAB, AND SETTLEMENT OF THE SLAB, WAS MADE WITH APPROPRIATE INSTRUMENTATION. THE PERFORMANCE OF THE SLAB WAS EXCELLENT. THE TEST DID INDICATE, HOWEVER, THAT MORE ATTENTION SHOULD BE DIRECTED TOWARDS THE LONGITUDINAL CRACKS OVER THE TENDONS AND THE ELIMINATION OF PUMPING AT THE EXPANSION JOINT. IT IS RECOMMENDED THAT PRESTRESSED PAVEMENTS OF THIS TYPE BE INCORPORATED INTO FUTURE HIGHWAY PROGRAMS FOR FURTHER STUDY. /AUTHOR/ REFERENCES' EXPERIMENTAL PRESTRESSED CONCRETE HIGHWAY PROJECT IN PITTSBURGH, BEN MORELL, J. J. MURRAY, AND J. E. HEINZERLING, HRB PROCEEDINGS, VOL37, PP150-190, 1958.

Media Info

  • Media Type: Print
  • Features: Figures;
  • Pagination: pp 59-76
  • Monograph Title: Rigid pavement design 1963
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00206212
  • Record Type: Publication
  • Files: TRIS, TRB
  • Created Date: Mar 24 1994 12:00AM