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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:
SP138-10
Date:
September 1, 1993
Author(s):
Janusz Kasperkjewicz and Hans W. Reinhardt
Publication:
Symposium Papers
Volume:
138
Abstract:
Several researchers have used aramid fibers as prestressing tendons and as chopped fibers in concrete because of their high strength and chemical resistance. In this investigation, an aramid fabric is used as bending reinforcement in concrete beams. Cracking, bending capacity, and ductility are determined experimentally. It is shown how effective aramid fabric can be if applied in several layers as tensile reinforcement.
DOI:
10.14359/3924
SP138-21
M. R. Ehsani, H. Saadatmanesh, and S. Tao
An overview of a study on bond of glass fiber reinforced plastic (GFRP) reinforcing bars to concrete is presented. The 78 specimens to be tested include several variables, such as the mode of failure (i.e., pullout or splitting), concrete compressive strength, bar diameter, clear cover distance, and top bar effects. In addition, the effect of the radius of bend for hooked bars and the extension on the hooks are investigated. The study is currently in progress and the results of the specimens tested to date are presented. Preliminary results indicate that the top bar effects observed for steel reinforcing bars are also present for GFRP bars. For hooked bars, larger radii of curvature increase significantly the failure load of the bars.
10.14359/3930
SP138-05
A. H. Rahman, D. A. Taylor, and C. Y. Kingsley
A comprehensive research program to investigate the suitability of a fiber reinforced plastic (FRP) for reinforced concrete is described. The investigation focuses on highway bridge decks and barrier walls. In determining the research needs, careful consideration has been given to the loads and environments to which highway bridges are subjected in northern North America. Short-term tension, creep, fatigue, and durability tests are being carried out on FRP specimens in the first phase of a three-phase program. Tests completed so far indicate a small yet noticeable change in strength and stiffness of FRP with change in temperature; small creep strain rates have been computed after 175 days of sustained loading, with satisfactory fatigue behavior under a tensile load cycling between 10 and 30 percent of the tensile strength.
10.14359/3919
SP138-18
Tatsunori Makizumi, Yoshifumi Sakamoto, and Shinichiro Okada
Investigates the cracking control effectiveness for flexural cracking of carbon fiber net (CFN) reinforcement, a two-dimensional grid consisting of sets of continuous carbon fibers. Prestressed concrete sheet piles with and without CFN reinforcement were tested in bending and the crack widths were examined. The CFN used in these tests had an element spacing of 20 mm in each direction; each element consisted of three strands each of 18,000 (18K) filaments. The netting was located in the specimens at a concrete cover of 3 mm. Since CFN could be set near the concrete surface and the transverse strands of CFN play an important role in resisting the applied tensile force, the crack widths were controlled effectively. A model for the prediction of crack width in concrete reinforcement with CFN is proposed. Good agreement with the calculated results and the experimental data is obtained.
10.14359/3927
SP138-19
T. Tamura, H. Mikami, O. Nakano, and N. Kishi
Presents the results of experimental study on the shock-absorbing performance of a prototype three-layered cushion system. This system consists of a concrete core slab reinforced with a braided aramid fiber plastic (AFRP) rod, and sandwiched between sand (top) and expanded polystyrol (bottom) layers. To study the effect of the rigidity, elongation, and bond strength of reinforcing bars on the shock-absorbing performance of a three-layered cushion system, three types of reinforcing bars were used: AFRP rod with surface bonded with silica, nonsand surfaced AFRP rod, and deformed steel bar. Furthermore, these results were compared with the results when a single sand layer was used as cushion material. The results achieved from these experiments are: (1) the transmitted stress of the three-layered cushion system is distributed more effectively than that of a single sand layer; (2) the distribution pattern of the transmitted stress in the three-layered cushion system was affected by the bond property of the reinforcing bar; and (3) duration time of the transmitted impact force was affected by the rigidity of the reinforcing bars.
10.14359/3928
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