The Use of Synthetic Blended Fibers to Reduce Cracking Risk in High Performance Concrete

Details

• Creators:
  Ideker, Jason H. ; Bañuelos, José
• Corporate Creators:
  Oregon. Dept. of Transportation. Research Section
• Corporate Contributors:
  United States. Federal Highway Administration
• Subject/TRT Terms:
  • Synthetic fibers
  • High performance concrete
  • Cracking of concrete pavements
  • Shrinkage
  • Fiber reinforced concrete
  • Polypropylene
  • Research Hub
  • Blended Fibers
• Publication/ Report Number:
  FHWA-OR-RD-15-05
• Resource Type:
  Tech Report
• Geographical Coverage:
  United States
• Corporate Publisher:
  Pacific Northwest Transportation Consortium
• Abstract:
  The aim of this project was to investigate a relatively new technique to control early-age cracking; the use of blended size polypropylene fibers in high performance concrete mixtures. The key findings from this work were that the use of drying shrinkage test methods alone, without the capture of cracking risk, showed that the inclusion of fibers did not reduce drying shrinkage in unrestrained specimens. However, in restrained testing (where the possibility of crack formation is promoted) the fibers were able to 1) reduce the rate of stress generation in specimens 2) prolong the time to cracking in the restrained ring test (ASTM C 1581) and 3) reduce the crack widths and the growth of cracks once cracking did initiate. As a result the use of blended fibers in high performance concrete points to another viable solution for reducing the risk of cracking in service.
• Format:
  PDF
• Funding:
  SRS 500-620
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28109/dot_28109_DS1.pdf
• File Type:
  [PDF - 2.05 MB]
• Collection(s):
  University Transportation Centers ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:a6825e6ccbef5d77d220e4b4ad0613d184a50e466887000d1884731bb097b49d