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Self-Consolidating Concrete for Precast, Prestressed Concrete Bridge Elements (2009) / Chapter Skim
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Pages 5-11

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From page 5...
... SCC mixtures suitable for use in precast, prestressed concrete girders should exhibit slump flow of 23.5 to 29 in.
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From page 6...
... Effect of w/cm and Air Entrainment In general, SCC mixtures with 0.38 w/cm exhibited better workability than those with 0.33 w/cm in terms of passing ability, filling capacity, and fluidity retention. However, SCC mixtures made with 0.33 w/cm developed greater static stability and higher 18-hour and 56-day compressive strengths under steam-cured and moist-cured conditions.
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From page 7...
... – SCC made with Type III cement and 20% Class F fly ash can exhibit better slump flow retention, higher passing ability, and higher filling capacity than that made with Type I/II cement. – HRWRA demand decreases with the increase in w/cm and binder content.
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From page 8...
... – 2.50 (BC · BT) 0.92 Filling capacity Slump flow – J-Ring flow (in.)
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From page 9...
... – Theoretically, for a given binder content, drying shrinkage increases with increase in w/cm; however, the derived statistical models show an opposite trend because drying shrinkage also includes autogenous shrinkage that decreases with the increase in w/cm. – SCC mixtures made with Type I/II cement develop less creep and shrinkage than those prepared with Type III cement and 20% Class F fly ash.
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From page 10...
... Although the SCC mixtures exhibited VSI values of 0.5 to 1 and caisson filling capacity higher than 80%, the tested mixtures developed various levels of uniformity of core compressive strength and pull-out bond strength results. The homogeneity of in-situ properties was shown to vary with plastic viscosity and static stability determined from the surface settlement test.
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From page 11...
... . • The lower ductilities and lower shear resistance of SCC girders compared with the corresponding HPC girders are due to the lower volume of coarse aggregate that reduces aggregate interlock and results in a lower energy absorption capability on the sliding shear failure plane.
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Key Terms

  • yield stress
  • flow test
  • mix design
  • slump flow
  • percent static

  • coarse aggregate
  • filling capacity
  • compressive strength
  • fly ash
  • fresh concrete

  • stressed concrete
  • filling ability
  • drying shrinkage
  • type iii
  • static stability

  • hardened properties
  • scc mixtures
  • column segregation
  • passing ability
  • surface settlement

  • scc mixture
  • static segregation
  • stability index
  • plastic viscosity
  • flexural strength

  • crushed aggregate
  • visual stability
  • prestressed applications
  • hardened concrete
  • concrete properties


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