A case study is reported, laboratory study is described, and the results are discusssed, in which extensive cracking of latex-modified, dry-mix shotcrete structures occurred as a result of both separation between the shotcrete layers and early shrinkage. Delamination of shotcrete layers was caused by applying new shotcrete layers over the hard surface of previously applied shotcrete that was partially covered with a smooth, dense, and nonabsorptive polymer-rich film caused by latex migration. The film did not provide proper bonding surface for freshly sprayed shotcrete and the subsequent delamination enhanced cracking crystals to form in cracks, which contributed to additional cracking and separation.

Media Info

  • Features: Figures; References;
  • Pagination: p. 39-42
  • Serial:
    • Concrete International
    • Volume: 12
    • Issue Number: 10
    • Publisher: American Concrete Institute (ACI)
    • ISSN: 0162-4075

Subject/Index Terms

Filing Info

  • Accession Number: 00602944
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 31 1990 12:00AM