DESIGN OF FIBER REINFORCED CONCRETE FOR PUMPING

This study was undertaken to develop a positive design procedure for pumpable fibrous reinforced concrete mixes and to provide information on this method for application in tunnel liners. The addition of fiber reinforcement to any combination of fine and coarse aggregates increases the void content of the mix. The incompressible paste content of the mix must exceed the void content so that segregation failure will not occur during pumping. Because of the inherent high void content and harshness of a fiber reinforced concrete mix compared to a plain concrete mix the gradation of the sand is more critical and the steps necessary to design a pumpable mix more detailed. The steps include selection of the aggregates, ratio of fine to coarse aggregate, volume of paste, quantity of water and the cement content. Mixes with four different coarse aggregate maximum sizes, two water reducing admixtures and one phase thickening admixture were studied. These mixes were evaluated in a laboratory testing apparatus designed to model actual pumping conditions.

• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Civil and Environmental Engineering
  205 North Mathews Avenue
  Urbana, IL  United States  61801-2352

  Department of Transportation

  Office of Research and Development, 1200 New Jersey Avenue, SE
  Washington, DC  United States  20590

  Federal Railroad Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Ounanian, D W
  • Kesler, C E
• Publication Date: 1976-8

Media Info

• Pagination: 53 p.

Subject/Index Terms

• TRT Terms: Coarse aggregates; Concrete; Design; Fiber reinforced concrete; Fibers; Fine aggregates; Formulations; Laboratory tests; Mix design; Pastes; Pumps; Reinforced concrete; Reinforcing steel; Sand; Slip form pavers; Steel wire; Tunnel lining; Void ratios; Water reducing agents
• Old TRIS Terms: Slip forms; Void
• Subject Areas: Design; Highways; Materials;

Filing Info

• Accession Number: 00158944
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: DOT/TST-76T-17 Final Rpt., UILU-ENG-76-2010
• Contract Numbers: DOT-FR-30022
• Files: NTIS, TRIS, USDOT
• Created Date: Aug 4 1977 12:00AM