Preparation of Highly Reinforced Steel Fiber Reinforced Concrete Composites

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Title: Preparation of Highly Reinforced Steel Fiber Reinforced Concrete Composites

Author(s): David R. Lankard and Jeffrey K. Newell

Publication: Special Publication

Volume: 81

Issue:

Appears on pages(s): 287-306

Keywords: compressive streng th; concrete pavements forced concretes; flexu ral st ren impact strength; metal gth; high strength fibers .; refractory concretes C - fiber re - oncretes; resurfac in-ing.

Date: 11/1/1984

Abstract:
Steel fiber reinforced concretes (SFRC) are typically prepared by adding the fiber along with the other concrete ingredients in the mixing operation. Using this "premix" approach, it is possible to incorporate up to about 265 lb/yd3 (2 volume percent) of fiber into the concrete. At fiber contents in excess of 2 volume percent, the SFRC becomes difficult or impossible to mix and place. Inasmuch as the improvements in concrete properties attributed to the fibers increase as a function of increasing fiber content, this situation places a limit on the ultimate property development in SFRC prepared using the premix approach. Recently, a procedure has been developed wherein steel fiber contents up to 18 volume percent have been provided in SFRC composites. The engineering properties of these highly reinforced composites are discussed along with a number of successful applications.