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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Showing 1-5 of 14 Abstracts search results
Document:
SP182-06
Date:
May 1, 1999
Author(s):
C. Peaston, K. Elliot, and K. Paine
Publication:
Symposium Papers
Volume:
182
Abstract:
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 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 fibers. Additionally, the effect of the manufacturing process, in which the concrete is compacted by rotating augers, on the fiber distribution and orientation was investigated. Whilst fibers 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.
DOI:
10.14359/5523
SP182-12
V. Kodur
This paper deals with the application of fibre-reinforced concrete to enhance structural fire resistance. Materials, such as fibre-reinforced concrete, have good fire resistance properties and by properly designing the building elements, fire resistance, in the practical range, can be obtained. The properties of steel fibre-reinforce concrete are discussed. Examples of some fire resistance applications of steel fibre-reinforced concrete in buildings are illustrated. Results from studies on the fire resistance of concrete-filled steel columns show that the addition of steel fibres in concrete filling improves the fire resistance of steel columns and eliminates the need for external fire protection. The application of fibre-reinforced concrete in enhancing the fire resistance of high strength concrete columns is also discussed.
10.14359/5529
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
SP182-02
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
SP182-08
P. Soroushian and S. Ravanbakhsh
Processed cellulose fibers provide high levels of elastic modulus, tensile strength, bond strength to concrete, and durability. Their fine diameter also yields a close fiber spacing at relatively low fiber volume fractions, ad allows them establish a strong presence in the interface zones between reinforcing bars and concrete. Specialty cellulose fibers have been recently developed for convenient dispersion research project investigated the effect of specialty cellulose fibers at volume fractions of about .1% on the strength and toughness of bond between deformed bars and concrete. The experimental results were indicative of the effectiveness of specialty cellulose fibers in enhancing bond strength and toughness. The positive impact of specialty cellulose fibers on bond strength was more pronounced as fiber volume fractions increased to the upper limit of .18% considered in this investigation.
10.14359/5525
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