Residual Mechanical Properties and Explosive Spalling of Fiber-Toughened High-Performance Concrete Exposed to High Temperatures

In this paper, an experimental investigation was conducted to identify the relationship between residual mechanical properties and explosive spalling occurrence of fiber-toughened high performance concrete exposed to high temperatures. The residual mechanical properties measured include compressive strength and tensile splitting strength, and fracture energy. A series of concretes were prepared employing OPC (ordinary Portland cement) and crushed carbonate. Steel fiber, polypropylene fiber, and hybrid fibers (polypropylene fiber and steel fiber) were added to enhance fracture energy of the concretes. After being subjected to high temperatures ranging from 200 to 800 degrees, the residual mechanical properties of the fiber-toughened high performance concrete were investigated. For fiber concrete, although residual strength was decreased by exposure to high temperatures above 400 degrees, residual fracture energy was significantly higher than that before heating. Incorporating hybrid fibers seems to be a promising way to enhance resistance of concrete to explosive spalling

Language

  • English

Media Info

  • Media Type: Print
  • Features: Figures; References; Tables;
  • Pagination: pp 1087-1096
  • Monograph Title: Seventh International Symposium on the Utilization of High Strength/High-Performance Concrete
  • Serial:
    • Volume: 1 & 2

Subject/Index Terms

Filing Info

  • Accession Number: 01005918
  • Record Type: Publication
  • ISBN: 0870311808
  • Files: TRIS
  • Created Date: Oct 7 2005 10:20AM