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Hybrid fibers in high performances extruded cement composites
Extruded composites containing combinations of several fiber types, referred to as hybrid composites, were studied. Fibers with a low modulus of elasticity and poor bond with a cement matrix, such as polypropylene (PP), were combined with fibers having high strength, high elastic modulus and superior bond, such as glass or polyvinylalcohol (PVA) fibers. The flexural performance of composites containing large amounts of fly ahs with different proportions of high modulus and low modulus fibers were examined. Composites were tested in dry and saturated conditions to determine the effect of moisture content on the flexural properties. The long-term durability of the hybrid composites, both with and without fly ash, was also examined. The effect of processing, casting vs. extrusion, was studied for the hybrid composites. It was found that the flexural performance of extruded composites can be controlled and optimized by using hybrid fibers. The addition of PVA fibers to a glass/PP hybrid composite significantly increases both the strength and the toughness of the composite producing a strain-hardening response. Also, the long-term durability of the glass/PP hybrid composite was found to be greater than that of the glass fiber composite. The flexural behavior was dependent on the moisture content of the composites during testing.
Hybrid fibers in high performances extruded cement composites
Extruded composites containing combinations of several fiber types, referred to as hybrid composites, were studied. Fibers with a low modulus of elasticity and poor bond with a cement matrix, such as polypropylene (PP), were combined with fibers having high strength, high elastic modulus and superior bond, such as glass or polyvinylalcohol (PVA) fibers. The flexural performance of composites containing large amounts of fly ahs with different proportions of high modulus and low modulus fibers were examined. Composites were tested in dry and saturated conditions to determine the effect of moisture content on the flexural properties. The long-term durability of the hybrid composites, both with and without fly ash, was also examined. The effect of processing, casting vs. extrusion, was studied for the hybrid composites. It was found that the flexural performance of extruded composites can be controlled and optimized by using hybrid fibers. The addition of PVA fibers to a glass/PP hybrid composite significantly increases both the strength and the toughness of the composite producing a strain-hardening response. Also, the long-term durability of the glass/PP hybrid composite was found to be greater than that of the glass fiber composite. The flexural behavior was dependent on the moisture content of the composites during testing.
Hybrid fibers in high performances extruded cement composites
Hybridfasern für extrudierte Hochleistungszementverbundstoffe
Peled, A. (author) / Cyr, M. (author) / Shah, S.P. (author)
2000
9 Seiten, 7 Bilder, 1 Tabelle, 5 Quellen
Conference paper
English
Hybrid fibers in high performances extruded cement composites
| British Library Conference Proceedings | 2000
| European Patent Office | 2022