A STUDY OF A LIGHTWEIGHT AGGREGATE CONCRETE FOR PRESTRESSED HIGHWAY BRIDGE GIRDERS - PHASE III

THE INVESTIGATION IS REPORTED OF CERTAIN PROPERTIES OF SEMI-LIGHTWEIGHT CONCRETE, THAT IS, CONCRETE USING FINE AGGREGATE OF NORMAL WEIGHT, BUT LIGHTWEIGHT COARSE AGGREGATE, WHICH WAS, FOR THE PURPOSES OF THIS STUDY, OBTAINED FROM TWO DIFFERENT SOURCES. TESTS WERE PERFORMED TO DETERMINE SHRINKAGE PROPERTIES OF THE CONCRETE, CREEP UNDER STATIC AND PRESTRESSING LOADS, VARIATION IN LOSS OF PRESTRESS DUE TO AN ECCENTRIC PRESTRESSING LOAD, AND STRESS TRANSFER CHARACTERISTICS. IN ADDITION, THE SECANT MODULUS OF ELASTICITY OF THE CONCRETE WAS DETERMINED. RESULTS INDICATED PROPERTIES SIMILAR TO NORMAL WEIGHT CONCRETE. AN ATTEMPT WAS MADE TO INSTRUMENT SOME FULL-SIZE PRESTRESSED GIRDERS SO AS TO GET AN INDICATION OF THE BEHAVIOR OF SEMI-LIGHTWEIGHT CONCRETE UNDER ACTUAL FIELD CONDITIONS. DURING THE FABRICATION OF THE BEAMS, HOWEVER, THE STRAIN GAGES ON THE PRESTRESSING STRANDS WERE DAMAGED, THUS RENDERING THIS PART OF THE PROJECT UNUSABLE. /BPR/

  • Supplemental Notes:
    • Hpr-1/2/, BPR-A-833, STATE-6503
  • Corporate Authors:

    University of Georgia, Experiment

    Georgia Experiment Station
    Experiment, GA  USA 

    Georgia State Highway Department

    ,    
  • Authors:
    • Mazanti, B B
  • Publication Date: 1967-9

Subject/Index Terms

Filing Info

  • Accession Number: 00212026
  • Record Type: Publication
  • Source Agency: Bureau of Public Roads /US
  • Files: TRIS, STATEDOT
  • Created Date: Jan 16 1994 12:00AM