The durability and physical properties of steel fiber reinforced concretes proportioned for pumpability criteria for tunnel liners are reported. The mix parameters include fiber contents of 0.9, 1.2 and 1.5 volume percent, maximum aggregate sizes of 3/8, 1/2, 3/4 and 1 in. (10, 13, 20 and 25 mm), and use of water reducers. Tests were performed at 28 d with type 1 cement concrete and between 1-1/2 h and 90 d with regulated-set cement concrete. Regulated-set cement concrete is found to lose nearly twice the strength as type 1 cement concrete for exposure to 660 F (350 C). Corrosion of steel fiber reinforcement is observed in cracked concrete with no apparent lower bound on crack size. The magnitude of the shrinkage of portland cement concretes proportioned for pumpability is related to the high paste contents required to fill the voids in the aggregate fiber array. An estimate of shrinkage can be made if the proportions of the mix and the curing are known.

  • 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:
    • Halvorsen, G T
    • Kesler, C E
    • Robinson, A R
    • Stout, J A
  • Publication Date: 1976-8

Media Info

  • Edition: Final Report
  • Pagination: 75 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00158943
  • Record Type: Publication
  • Source Agency: National Technical Information Service
  • Report/Paper Numbers: DOT/TST-76T-21, UILU-ENG-76-2013
  • Contract Numbers: DOT-FR-30022
  • Files: NTIS, TRIS, USDOT
  • Created Date: Aug 4 1977 12:00AM