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Home > Publications > International Concrete Abstracts Portal
Showing 1-5 of 14 Abstracts search results
Document:
SP182
Date:
May 1, 1999
Author(s):
Editors: N. Banthia, C. MacDonald, and P. Tatnall
Publication:
Symposium Papers
Volume:
182
Abstract:
This Symposium Publication presents 13 papers on the use of fiber reinforcement in structural applications and assembles the thoughts of some leading researchers in the field. Collectively, these writings are a snapshot of contemporary thinking in this field and provide a direction for future activity. Note: The individual papers are also available as .pdf downloads.. Please click on the following link to view the papers available, or call 248.848.3800 to order. SP182
DOI:
10.14359/14175
SP182-01
B. Aarup
CRC ( Compact Reinforced Composite) is the designation for a special type of fiber reinforced concrete with high strength (150-400 Mpa) and closely spaced reinforcing bars. The dense matrix-with water/powder ratios of typically 0.16-provide a good bond to fibers and reinforcing bars, and the large content of steel fibers provide the ductility necessary for utilizing reinforcement effectively. The steel fiber content is typically 2-6% by volume and the content of reinforcing steel is 2-10% by volume. The improved durability of the matrix- due to a high micro silica content-makes it possible to use a concrete cover to the reinforcement of only 10mm in aggressive environments, improving the effectiveness of the reinforcement. The CRC concept was developed in 1986 and aimed specifically for use in structures such as beams, columns and joints, but most of the applications so far have been in the security industry, for corrosion protection and in heavily loaded floors. However, in the last few years CRC has also been applied in structures. One of these applications, production of 40,000 drain covers for a tunnel as a replacement for cast-iron covers, is described as an example of a project where the properties o high performance fiber reinforced concrete were utilized.
10.14359/5518
SP182-02
B. Oh, D. Lim, K. Hong, S. Yoo, and S. Chae
The structural behavior of steel fiber reinforce concrete beams in shear is studied. A comprehensive experimental program has been set up and several series of reinforced concrete beams with steel fibers have been tested. The test variables include the volume contents of steel fibers and stirrups. The fiber contents varies from 0% to 2% by volume. It is seen form these tests that the cracking and ultimate shear strengths increase as fiber content increase. The present study indicates that fiber reinforcement can reduce the amount of shear stirrups may accomplish strength requirements s well as ductility requirements. A theoretical approach is proposed to predict the shear strength of reinforced concrete beams containing steel fibers and good correlations obtained with test data. The present study allows more efficient structural application of steel fibers for shear reinforcement in reinforced concrete structures.
10.14359/5519
SP182-03
M. Marazzini and G. Rosati
The mechanical behavior of a few plain and fiber-reinforced high performance concretes (fact=80-130 Mpa) is studied here by means of direct tensile tests and three-point bending tests, and a special "identification" Procedure is adopted in order to cleanse the stress-strain and stress-displacement curves of any undesired structural effect. The overall behavior of two P/C beams typifying the sub-elements of a hollow-core slab is examined, with and without fibers, to sturdy crack formation and propagation ( by optical interferometry) and structural ductility.
10.14359/5520
SP182-04
P. Casanova and P. Rossi
The use of steel fibers as shear reinforcement in reinforced concrete beams is very promising. In this paper, an optimized high strength concrete with steel fibers (100 kg/m3) is used in rectangular beams (2.3 times .25 times .125 m), reinforced with longitudinal bars. This solution is compared with classical reinforced concrete. Five specimens are tested in four-point bending. The 28-day mean compressive strength of concrete is 90 Mpa measured on cylinders. The global behavior of the equal for all tested beams but the cracking is equal for all tested beams but the crack opening is smaller with steel fibers. No problems were encountered concerning ductility.
10.14359/5521
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