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Single fiber pullout from the hybrid fiber reinforced matrices
Hybrid fiber reinforcement can be very efficient for improving the tensile response of the composite. In such materials, fibers of different geometries can act as bridging mechanisms over cracks of different widths. The fiber bridging efficiency depends on the interface properties, which makes interface characterization very important.Therefore, single-fiber pullout tests from different mortar matrices, reinforced with different volume percentages of two types of fibers are performed. The single fibers that have been pulled out are made of high-strength steel and have different angles of inclination with respect to the specimen surface. The composition of the mortar matrix has been varied as well.The pullout response of single fibers generally improves with increasing percentage of fibers in the mortar. Moreover, pullout forces are generally higher when the matrix has a higher strength. In all these cases, intensive microcracking of the surrounding matrix can be observed during pullout of the inclined fibers.Together with single-fiber pullout tests, standard compression tests and splitting tensile tests, as well as work-ability studies have been performed, in order to provide experimental data for further research of the high-performance hybrid fiber reinforced concrete.
Single fiber pullout from the hybrid fiber reinforced matrices
Hybrid fiber reinforcement can be very efficient for improving the tensile response of the composite. In such materials, fibers of different geometries can act as bridging mechanisms over cracks of different widths. The fiber bridging efficiency depends on the interface properties, which makes interface characterization very important.Therefore, single-fiber pullout tests from different mortar matrices, reinforced with different volume percentages of two types of fibers are performed. The single fibers that have been pulled out are made of high-strength steel and have different angles of inclination with respect to the specimen surface. The composition of the mortar matrix has been varied as well.The pullout response of single fibers generally improves with increasing percentage of fibers in the mortar. Moreover, pullout forces are generally higher when the matrix has a higher strength. In all these cases, intensive microcracking of the surrounding matrix can be observed during pullout of the inclined fibers.Together with single-fiber pullout tests, standard compression tests and splitting tensile tests, as well as work-ability studies have been performed, in order to provide experimental data for further research of the high-performance hybrid fiber reinforced concrete.
Single fiber pullout from the hybrid fiber reinforced matrices
Einzelfaserauszug von hybridfaserverstärkten Matrizen
Markovich, I. (author) / Mier, J.G.M. van (author) / Walraven, J.C. (author)
2002
12 Seiten, 13 Bilder, 3 Tabellen, 5 Quellen
Conference paper
English
Single Fiber Pullout from the Hybrid Fiber Reinforced Matrices
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