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:
  Admixtures Concrete Pavements Cracking Of Concrete Pavements Fiber Reinforced Concrete Heat Of Hydration High Early Strength Cement Laboratory Tests Shrinkage Slab On Grade
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection
• Main Document Checksum:
  urn:sha256:31e2ce070237f147e30ecd37bd84c3c1ebb05d5988e90b3e0ac1ae3235f83497
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/27457/dot_27457_DS1.pdf
• File Type:
  [PDF - 2.33 MB ]