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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 56 Abstracts search results
Document:
SP138-39
Date:
September 1, 1993
Author(s):
H. Taniguchi, H. Mutsuyoshi, T. Kita, and A. Machida
Publication:
Symposium Papers
Volume:
138
Abstract:
PC members reinforced with FRP as tendons show brittle failure regardless of the failure mode. The authors' objective was to improve the ductility of PC members reinforced with FRP as tendons. First, the compressive properties of concrete confined with FRP as transverse reinforcement was investigated. Major improvement can be made in the stress-strain relationship of concrete laterally reinforced with FRP, and the concrete members can be given ductility characteristics similar to those of steel-reinforced members by confining the concrete with FRP. Secondly, several PC members reinforced with FRP as tendons and transverse reinforcement were tested and investigated. It was found that marked improvements could be made in the ductility of PC members with FRP tendons by confining the part of concrete subjected to flexural compression with FRP and forcing the members to undergo flexural compression compression failure. 235-493
DOI:
10.14359/3788
SP138-52
N. Santoh, H. Kimura, T. Enomoto, T. Kiuchi, and Y. Kuzuba
The characteristics of CFCC, including mechanical properties, fatigue, relaxation, and anticorrosive properties, are described. Examples of actual bridges in which CFCC has been used as a reinforcement are shown. In summarizing the investigation of these characteristics and the results of such tests as adhesion with concrete, antifatigue characteristics, antialkali characteristics, relaxation, and temperature cycle tests, it was confirmed that CFCC is a material suitable for tension applications in PC bridges.
10.14359/4272
SP138-40
N. Kawaguchi
This paper deals with the theoretical and experimental study on the ultimate behavior of concrete members reinforced with AFRP rods under combined axial load and bending. This involving the tests on twelve model specimens subjected to eccentric tension or compression, contributes data on crack formations, ultimate strength, curvature variation and flexural rigidity deterioration. No marked difference from conventional reinforced concrete members could be observed. Ductility based on the rotational capacity of cross section and flexural rigidity after the formation of cracks were both relatively small. In cases where a certain amount of bond is maintained, even when the members are placed under axial forces, the estimation at least of the ultimate strength is thought possible by application of the beam theory with the term for the axial forces taken into account.
10.14359/10039
SP138-48
V.L. Brown and C.L. Bartholomew
In reinforced concrete pavements, dowel bars are typically used to transfer the load across the transverse joint from one pavement slab into the adjoining slab. Steel dowels have been used almost exclusively in these applications in the past. Because the bars cross construction joints, they are particularly susceptible to corrosion from the salts used for ice control. Corrosion can cause the dowel bar to fail or to freeze in the joint, resulting in pavement distress. As a solution to this problem, it would appear to be practical to fabricate the dowels from a material which is more resistant to corrosion from roadway salts than is steel. This paper presents the initial results from an investigation into the feasibility of substituting fiberglass reinforced plastic (FRP) dowel bars for steel bars in reinforced concrete pavements. FRP dowels are compared with steel dowels, both theoretically using a Friberg analysis and also experimentally through laboratory tests with scaled model slabs. It is concluded that the use of FRP dowels is feasible, provided that dowel diameters are increased approximately 20 to 30 percent.
10.14359/10040
SP138-02
Rajan Sen, Daniel Mariscal, and Mohsen Shahawy
A comprehensive durability study of S-2 glass-epoxy pretensioned beams exposed to wet-dry cycles in 15 percent salt solution indicated a complete loss of effectiveness within 3 to 9 months of exposure. Paper presents results of subsequent follow-up investigations to identify the cause of this deterioration and also to examine practical measures that could be used to prevent its occurrence. The analysis of the test results suggests that the most likely cause of failure was diffusion of hydroxyl ions from the concrete pore solution through the resin. This is supported by SEM micrographs of the failed beam. While these conclusions are valid only for the S-2 resin, diffusion is also likely to be a characteristic of other types of resins, e.g., vinylesters and polyesters. This makes long-term protection of glass fibers in concrete problematic.
10.14359/3857
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