Simulation of prepackaged grout bleed under field conditions : [summary].

Details

• Creators:
  Hamilton, H.R.
• Corporate Creators:
  University of Florida
• Subject/TRT Terms:
  • Grout
  • Posttensioning
  • Bleeding (Pavements)
  • Portland cement
  • Fillers (Materials)
  • Admixtures
  • Calcium carbonate
  • Tubing
  • Field tests
  • Simulation
• Publication/ Report Number:
  BDK75-977-59
• Resource Type:
  Brief
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation
• Abstract:
  Post-tensioning (PT) is a method of compensating ; for concrete’s weakness under tension by adding ; steel. Tubes (ducts) are cast into concrete ; components; after the concrete sets, high-strength steel cables (tendons or strand) are run ; through the ducts, secured at both ends, and ; tensioned by powerful jacks. The ducts are then ; filled with PT grout, which hardens, preventing ; corrosion and bonding the cables to the concrete. ; PT is a very successful and widely used method. ; However, its durability depends on the quality of ; the grout and its installation. Since grouting is a ; blind operation, some problems with grout only ; become apparent years later — as soon as two ; years in some cases. Voids or other irregularities in ; grout distribution or setting can lead to corrosion, ; which can lead to failure of the concrete ; component. In this report, University of Florida ; researchers focused on a problem which has been ; found in several bridges in Florida, soft grout — ; grout which has not hardened after many years ; and is often associated with corrosion.
  More +
• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27336/dot_27336_DS1.pdf
• File Type:
  [PDF - 835.52 KB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:820eaa7f0ceccec672507eaa2d72a82d25d59bb3f695f42ed879587054476717