CORROSION TESTING OF GROUT FOR POSTTENSIONING DUCTS AND STAY CABLES

Grout mixes using commercially available antibleed admixtures were tested for fresh properties and subsequently corrosion tested using anodic polarization to accelerate the corrosion process. Commercial admixtures that are intended to improve the corrosion protection provided by the grout were also tested in grout mixes containing the antibleed admixture. From a comparison, it was found that the antibleed admixture reduced the corrosion protection of the grout and a mix with no antibleed admixture did not. It was also found that one corrosion protection admixture improved protection, while the other admixture reduced protection provided by the grout. Because the accelerated tests were conducted at an artificially high potential of 600 mV, there is some concern that the polarization level at the strand will differ significantly among grouts with varying ohmic resistances. Potentiodynamic tests were conducted on selected specimens to investigate this effect and were inconclusive. Further study into this effect is recommended before the higher polarization levels are used to evaluate grouts that having varying ohmic resistances.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/07339445
• Corporate Authors:

  American Society of Civil Engineers

  1801 Alexander Bell Drive
  Reston, VA  United States  20191-4400
• Authors:
  • Hamilton III, H R
  • Wheat, H S
  • Breen, J E
  • Frank, K H
• Publication Date: 2000-2

Language

• English

Media Info

• Features: Appendices; Figures; References; Tables;
• Pagination: p. 163-170
• Serial:
  • Journal of Structural Engineering
  • Volume: 126
  • Issue Number: 2
  • Publisher: American Society of Civil Engineers
  • ISSN: 0733-9445
  • Serial URL: http://ascelibrary.org/loi/jsendh

Subject/Index Terms

• TRT Terms: Accelerated tests; Admixtures; Anodic polarization; Cables; Corrosion; Corrosion tests; Ducts; Grout; Polarization; Posttensioning; Resistance (Electricity)
• Subject Areas: Bridges and other structures; Design; Highways; Materials; I24: Design of Bridges and Retaining Walls; I32: Concrete;

Filing Info

• Accession Number: 00783840
• Record Type: Publication
• Contract Numbers: 336212
• Files: TRIS
• Created Date: Feb 26 2000 12:00AM