Evaluation of corrosion resistance of improved post-tensioning materials after long-term exposure testing

Description:

Ten full-scale post-tensioned beam specimens were subject to 4 years of aggressive cyclic ponded saltwater exposure. Three of those specimens were additionally exposed to saltwater spray once per month on one anchorage face. Non-destructive monitoring was conducted during the exposure period. This consisted of half-cell potential measurements, AC impedance measurements (for specimens with fully encapsulated tendons), and regular visual inspections. Chloride samples were extracted from the specimens at the end of exposure. "After 4 years, the specimens were autopsied, and all reinforcing elements from the middle of each specimen were examined for corrosion and damage. Anchorage regions were also autopsied and examined for corrosion. Duct systems included galvanized metal ducts, plastic ducts, and encapsulated duct systems. Strand types included conventional strand, hot dipped galvanized strand, copper clad strand, and stainless steel strand. Complete observations are presented."

Creator(s):
Location(s): United States - Texas
Creation Date: October 2011
Partner(s):
UNT Libraries Government Documents Department
Collection(s):
Texas State Publications
Usage:
Total Uses: 31
Past 30 days: 4
Yesterday: 0
Creator (Author):
Creator (Author):
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Publisher Info:
Place of Publication: Austin, Texas
Date(s):
  • Creation: October 2011
Coverage:
Place
United States - Texas
Era
Into Modern Times, 1939-Present
From September 2010 to September 2011
Description:

Ten full-scale post-tensioned beam specimens were subject to 4 years of aggressive cyclic ponded saltwater exposure. Three of those specimens were additionally exposed to saltwater spray once per month on one anchorage face. Non-destructive monitoring was conducted during the exposure period. This consisted of half-cell potential measurements, AC impedance measurements (for specimens with fully encapsulated tendons), and regular visual inspections. Chloride samples were extracted from the specimens at the end of exposure. "After 4 years, the specimens were autopsied, and all reinforcing elements from the middle of each specimen were examined for corrosion and damage. Anchorage regions were also autopsied and examined for corrosion. Duct systems included galvanized metal ducts, plastic ducts, and encapsulated duct systems. Strand types included conventional strand, hot dipped galvanized strand, copper clad strand, and stainless steel strand. Complete observations are presented."

Note:

October 2011 ; Project 0-4562

Physical Description:

xviii, 167 p. : col. ill. ; 28 cm.

Language(s):
Subject(s):
Keyword(s): galvanized ducts | plastics ducts | encapsulated system | autopsies | corrosion | post-tensioned concrete tendons | epoxy coated strand | stainless steel strands | stainless clad strands | hot dip galvanized strand | copper clad strands | accelerated corrosion testing
Contributor(s):
Added Title: Corrosion resistance of grouted post-tensioning systems
Partner:
UNT Libraries Government Documents Department
Collection:
Texas State Publications
Identifier:
  • LOCAL-CONT-NO: txca-0007
  • OCLC: 799881126 |
  • TXDOC: T1311.7 R311 NO.4562-4
  • REP-NO: 4562-4
  • ARK: ark:/67531/metapth281713
Resource Type: Report
Format: Text