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Comparison of Mechanical Properties of Unidirectional and Woven Carbon, Glass and Aramid Fiber Reinforced Epoxy Composites

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Ekşı S., Genel K.
Acta Physica Polonica A
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2017
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vol. 132
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issue 3
879-882
EN
In this study, mechanical behavior of epoxy composite reinforced by unidirectional and woven fiber is investigated experimentally. In the preparation of composite samples woven shaped glass, aramid and carbon fibers and unidirectional shaped glass and carbon fibers were used. Tension, compression and shear tests were carried out to determine mechanical properties of composites. It is seen from the test results, that unidirectional carbon fiber shows better performance than the glass fiber. Mechanical properties of 0°-oriented unidirectional fiber are better than those of 90°-oriented unidirectional fiber. Mechanical properties of aramid-fiber-reinforced composite are higher than those of glass and carbon fiber, when the woven types of fibers are considered.
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The Strength Properties of Fibre Reinforced Self Compacting Concrete

100%
Bozkurt N., Yazicioğlu S.
Acta Physica Polonica A
|
2017
|
vol. 132
|
issue 3
775-778
EN
This paper reports results of an experimental study of the strength properties of fibre reinforced self-compacting concrete (FRSCC). For this aim, a control self-compacting concrete and 24 FRSCCs were designed, applying fresh self-compacting concrete criteria tests. In the design of FRSCC, four steel and two polypropylene synthetic fibres of different lengths and aspect ratios were used. These fibres were used alone and in combinations with two and four of these fibres. In this way, not only the effect of single fibre and the synergy effect of hybrid fibres, but also the size and concentration effect of fibres, which had different ratios in total fibre volume, were investigated. In the design process, Portland cement and fly ash were used as the binder and the powder material. The compressive and flexural-tensile strength tests were employed at the age of 3, 7, 28, 56 and 90 curing days, to determine the strength properties of FRSCCs. Moreover, ultrasound pulse velocity test was also performed on all concrete series at the same ages.
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