Title:
Properties of Fiber Reinforced Concrete: Workability, Behavior Under Long-Term Loading, and Air-Void Characteristics
Author(s):
P. Balaguru and V. Ramakrishnan
Publication:
Materials Journal
Volume:
85
Issue:
3
Appears on pages(s):
189-196
Keywords:
air-entrained concretes; air-entraining agents; air entrainment; creep properties; creep recovery; fiber reinforced concretes; metal fibers; loads (forces); setting (hardening); shrinkage; water-reducing agents; workability; Materials Research
DOI:
10.14359/1849
Date:
5/1/1988
Abstract:
This paper presents the results of an experimental investigation of the behavior of steel fiber reinforced concrete. The properties investigated were: setting times, slump and air content loss with time, creep and shrinkage, and air-void characteristics including bubble size distribution. To compare the behavior of fiber reinforced concrete with plain concrete, all of the preceding properties were also investigated for plain concrete mixtures of similar composition. Two mixture proportions with cement contents of 611 and 799 lb/yd3 (363 and 474 kg/m3) were investigated. Results indicate that setting times are about the same for both concretes. Fiber concrete has lower slump and air content; the rate of loss of these parameters with time is also higher. Shrinkage of fiber reinforced concrete is slightly less, but it undergoes slightly more creep deformations. In the area of air-void characteristics, the specific surface of air bubbles is lower for fiber reinforced concrete, and it has relatively less number of chord-intercepts in the 0 to 0.002-in. (0 to 0.05-mm) range.