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Durability of Precast Segmental Bridges Final Report (1998) / Chapter Skim
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Chapter 3 Study Implications
Pages 25-28

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From page 25...
... Certainly high quality design details and proper construction practices must be continued, especially when using internal tendons. It is important to adopt more stringent grouting requirements and inspection procedures, similar to what has been done in the U.K., to insure that the tendons are completely encapsulated in a high quality grout.
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From page 26...
... Although the study survey indicated that designers are using, and owners are adopting, the AASHTO Segmental Guide Specifications, AASHTO should formally adopt the guide specifications as part of the Standard Specifications for Highway Bridges to insure that durable segmental design and construction practices continue to be implemented. In addition, the AASHTO Specification should specifically preclude the use ofthin mortar segment joints.
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From page 27...
... These include proper epoxying of the segments, adequate Recompression across the joints' complete grouting with a high quality grout' and high quality concrete in the precast segments. 3.3 Inspection and Evaluation Techniques Currently, there is a need for better non-destructive evaluation and inspection techniques for the condition of post-tensioning tendons insitu.
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From page 28...
... Thus, designers should be encouraged to provide additional ducts and good access to their structures so as to allow the installation of future additional post-tensioning, if required.
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Key Terms

  • segmental bridges
  • segmental construction
  • construction practices
  • internal tendons
  • segment joints

  • poor design
  • corrosion protection
  • guide specifications
  • research indicates
  • corrosion potentials

  • epoxy joints
  • proper construction
  • using internal
  • construction utilizing
  • adequate recompression

  • concrete joints
  • joints performed
  • corrosion performance
  • steel corrosion
  • nondestructive testing

  • polarization corrosion
  • testing art
  • durability design
  • bonded posttensioning
  • utilizing metal

  • adequate corrosion
  • performed significantly
  • exhaustive field
  • intrinsic durability
  • construction choices


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