Self-consolidating concrete for prestressed applications - phase II : bridge construction and in-place performance.

Details

• Creators:
  Keske, Samuel D. ; Barnes, Robert W. ; Schindler, Anton K. ; Johnson, Brandon R. ; Ellis, Morgan A. ; Miller, D. Eric ; Neal, Tyler L.
• Corporate Creators:
  Auburn University. Highway Research Center
• Corporate Contributors:
  Alabama. Dept. of Transportation ; United States. Federal Highway Administration
• Subject/TRT Terms:
  • Self compacting concrete
  • Prestressed concrete bridges
  • Bridge construction
  • Field studies
  • Laboratory studies
  • Creep
  • Shrinkage
  • Elasticity (Mechanics)
• Publication/ Report Number:
  FHWA/ALDOT 930-799
• Resource Type:
  Tech Report
• Geographical Coverage:
  Alabama
• Corporate Publisher:
  Auburn University. Highway Research Center
• Abstract:
  Prior to statewide acceptance of self-consolidating concrete (SCC) in precast, prestressed bridge member ; production, the Alabama Department of Transportation sponsored an investigation of the material to be ; performed by the Auburn University Highway Research Center. Two parts of that research are presented in ; this report: an extension of an earlier laboratory investigation of fresh stability test methods to quantify the ; unique fresh behavior of SCC, and a field investigation of as-built material and long-term structural behavior ; in the first full-scale SCC girders produced and placed in an in-service bridge in Alabama. ; During the laboratory investigation, the Visual Stability Index, Sieve Stability, and Surface Settlement ; tests correlated most strongly to multiple measures of hardened concrete uniformity; a testing protocol utilizing ; these test methods is recommended. In the field investigation, the utilized SCC exhibited slightly increased ; time-dependent creep and shrinkage, at least in representative cylinders. Long-term SCC-girder prestress ; maintenance was found to be practically identical and at least as conservatively predictable as in companion, ; geometrically identical vibrated-concrete (VC) girders. Full-scale elastic responses to the weight of the cast-in-place deck and to service-level live loads were also practically identical in the SCC and VC girders, and SCC ; performed more conservatively than expected of VC of the same elastic stiffness. Use of cylinder-measured ; mechanical and time-dependent property results led to conservative predictions of full-scale behavior, and use ; of design properties led to highly conservative predictions. Based on these results, SCC is an acceptable ; alternative to VC for precast, prestressed girders when using current design and production procedures.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/29489/dot_29489_DS1.pdf
• File Type:
  [PDF - 5.18 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:71007784422398100ccd09b696e4610286382afc35bf23f6551b32b8f6d5c9f6