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Pull-out behaviour of steel fibers in self-compacting concrete
An experimental research program was started focusing on the pull-out behavior of different steel fiber types in self-compacting concrete (SCC). The influences of the fiber end hook, the embedment depth, and the concrete age on the pull-out behaviour were determined for two different steel fibers. The experimental program was divided in two parts, differing mainly in the specimen shape. The first test investigates the influence of the concrete type on the load-bearing behavior of the steel fibers. For comparison, a self-compacting concrete (SCC-1) and a normal vibrated concrete (NC) of similar strength were used. In the second test, only self-compacting concrete (SCC-2) was the anchorage ground for the embedded fibers. The main aim was the creation of a mix design of SCC and NC resulting in approximately the same compressive strengths for both concretes. The influence of parameters like the type of concrete, its age, and the fiber geometry was more important at fiber type 1 with a lower l/d-ratio of 50 than at fiber type 2 with l/d-ratio of 62.5. The bond behaviour of fibers embedded in SCC was better than that ones of fibers embedded in NC. It could be concluded that the circumstance of the improved interface between fiber and matrix at SCC led to the higher pull-out loads. The end hooks are very important in getting effective pull-out loads. The ultimate loads increased with raising inclination of the end hook.
Pull-out behaviour of steel fibers in self-compacting concrete
An experimental research program was started focusing on the pull-out behavior of different steel fiber types in self-compacting concrete (SCC). The influences of the fiber end hook, the embedment depth, and the concrete age on the pull-out behaviour were determined for two different steel fibers. The experimental program was divided in two parts, differing mainly in the specimen shape. The first test investigates the influence of the concrete type on the load-bearing behavior of the steel fibers. For comparison, a self-compacting concrete (SCC-1) and a normal vibrated concrete (NC) of similar strength were used. In the second test, only self-compacting concrete (SCC-2) was the anchorage ground for the embedded fibers. The main aim was the creation of a mix design of SCC and NC resulting in approximately the same compressive strengths for both concretes. The influence of parameters like the type of concrete, its age, and the fiber geometry was more important at fiber type 1 with a lower l/d-ratio of 50 than at fiber type 2 with l/d-ratio of 62.5. The bond behaviour of fibers embedded in SCC was better than that ones of fibers embedded in NC. It could be concluded that the circumstance of the improved interface between fiber and matrix at SCC led to the higher pull-out loads. The end hooks are very important in getting effective pull-out loads. The ultimate loads increased with raising inclination of the end hook.
Pull-out behaviour of steel fibers in self-compacting concrete
Holschemacher, Klaus (author) / Klug, Yvette (author)
2005
6 Seiten, 12 Bilder, 2 Tabellen, 3 Quellen
Conference paper
English
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