STEEL FIBER REINFORCEMENT FOR EXTRUDED PRESTRESSED HOLLOW CORE SLABS

An experimental investigation was conducted to assess the potential of steel fibers as secondary reinforcement in prestressed hollow core slabs. Following a brief laboratory study and a feasibility trial, a series of fibre reinforced extruded slabs were made at the premises of a local manufacturer and subsequently tested in shear: one of a number of potential modes of failure which cause concern in this type of slab because of the lack of shear or secondary reinforcement. The addition of the fibres increased both the ultimate strength and toughness of the slabs leading to safer and more controlled failures. The predictive equations of other researchers were shown to accurately estimate the shear strength in the case of plain hollow core slabs, but to overestimate the shear enhancement due to adding steel fibres. Additionally, the effect of the manufacturing process, in which the concrete is compacted by rotating augers, on the fibre distribution and orientation was investigated. While fibres were found to be randomly distributed within the cross-section, a tendency to align vertically within the webs was observed. This has particular relevance to the vertical shear performance.

• Corporate Authors:

  American Concrete Institute (ACI)

  38800 Country Club Drive
  Farmington Hills, MI  United States  48331
• Authors:
  • PEASTON, C
  • Elliott, K
  • PAINE, K
• Publication Date: 1999

Language

• English

Media Info

• Features: Figures; References; Tables;
• Pagination: p. 87-107
• Monograph Title: STRUCTURAL APPLICATIONS OF FIBER REINFORCED CONCRETE

Subject/Index Terms

• TRT Terms: Extrusion; Fiber reinforced concrete; Precast concrete; Prestressed concrete; Reinforcing materials; Research projects; Shear strength; Slabs; Steel fibers
• Subject Areas: Highways; Materials; Research; I32: Concrete;

Filing Info

• Accession Number: 00765177
• Record Type: Publication
• Files: TRIS
• Created Date: Jun 8 1999 12:00AM