Use of fiber reinforced concrete for concrete pavement slab replacement.

Details

• Creators:
  Suksawang, Nakin ; Mirmiran, Amir ; Yohannes, Daniel
• Corporate Creators:
  Florida International University ; Florida Institute of Technology
• Subject/TRT Terms:
  • Concrete pavements
  • Cracking of concrete pavements
  • Slab on grade
  • High early strength cement
  • Shrinkage
  • Heat of hydration
  • Fiber reinforced concrete
  • Laboratory tests
  • Admixtures
• Publication/ Report Number:
  BDK80 TWO 977-27
• Resource Type:
  Tech Report
• Geographical Coverage:
  Florida
• Corporate Publisher:
  Florida. Dept. of Transportation. Research Center
• Abstract:
  Unlike ordinary concrete pavement, replacement concrete slabs need to be open to traffic within 24 hours (sooner in ; some cases). Thus, high early-strength concrete is used; however, it frequently cracks prematurely as a result of high ; heat of hydration that leads the slab to develop plastic shrinkage. FRC is known to provide good resistance to plastic ; shrinkage and has a proven record in the building industry particularly with slab-on-grade application. However, the ; current specification does not address the use of FRC in civil infrastructure. The only specification under ; development for FRC usage is for bridge deck application which does not address the use of FRC in controlling ; plastic shrinkage. This research project explored the potential use of fiber reinforced concrete (FRC) in concrete ; pavement slab replacement particularly in controlling plastic shrinkage. Five different fiber types, including steel, ; glass, basalt, nylon, and polyethylene fibers were investigated. Additionally, the effect of fiber length was also ; investigated for the polyethylene fiber. The fibers were added at low-dosage amounts of 0.1% and 0.3% by volume. ; Retrained shrinkage tests were conducted to assess the cracking potential of the concrete mixtures and the ability for ; each fiber type to resist cracking. Results indicated that both polyethylene and nylon fibers provided the best ; resistance to early-age shrinkage. However, balling was a problem for nylon fiber reinforced concrete. Short fibers ; (< 1-in.) also had the best performance in resisting early-age shrinkage, while long fibers (> 1-in.) provided ; additional post-cracking capacity. For replacement slab, it is recommended that a short polyethylene fiber be used to ; eliminate uncontrolled cracking.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27457/dot_27457_DS1.pdf
• File Type:
  [PDF - 2.33 MB]
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:31e2ce070237f147e30ecd37bd84c3c1ebb05d5988e90b3e0ac1ae3235f83497