To provide corossion protection for 7-wire prestressing strand in prestressed concrete used in adverse environments, a manufacturer has developed an epoxy-coated strand. The effect of the epoxy coatings and grit on transfer length for 3 different sizes of prestressing strand was investigated. The transfer length of 3 differenct densities of grit were also studied. Fifty-three specimens were cast to determine the transfer length of epoxy-coated and bare (uncoated) prestressing strand. The transfer length was determined by measuring concrete strains before and after release. Also studied were the effects of time on transfer length of epoxy-coated strand - referred to as transfer-length creep - the relationship between end slip and transfer length of prestressing strand, and the effects of elevated temperatures on the transfer length of epoxy-coated strand. The experimental and analytical results from this research were compared to the results in the literature, provisions in the ACI Building Code (ACI 318-83), and previously proposed bond provisions.

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  • Accession Number: 00495265
  • Record Type: Publication
  • Report/Paper Numbers: Title No. 87-M21
  • Files: TRIS
  • Created Date: Jul 31 1990 12:00AM