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Testing and performance of bond of steel bars in fiber reinforced self-compacting concrete



Author(s): D.J. Marie, G.P.C. Correia, T.T. Lima
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 489 - 499
Total Pages: 10
Language: English


Abstract: 
The principal characteristic attributed to concrete as a building material is the excellent bond to the steel bar. This bond has been the subject of many studies and researches, where experimental tests gave rise to several models that search to describe the behavior of this complex phenomenon. The practicability of producing concrete with chemical and mineral additive and steel fibers has been achieved in several applications, and it is well established that the incorporation of steel fibers can improve several properties of concrete. However such concretes present different behavior and require further investigations. This paper investigates the performance of self-compacting fiber reinforced concrete through the pullout of a steel bar from a massive concrete, according to [1]. Three specimens of self-compacting concrete made with 1% by volume of steel fibers, were tested, and the results compared to those of conventional concrete specimens. The specimens were tested using steel bars of diameter 10 mm and 16 mm. Completed load vs displacement curves were analyzed to assess the characteristics of the specimens during and at the end of the test. The results indicated that the steel fiber reinforcement in self-compacting concrete provoked a significant increase in the load required to pull the steel bar out of the concrete matrix. The presence of steel fibers also changed the failure mode showing less damage at test end when compared to those specimens of conventional concrete. The diameter of the steel bar had greater influence on the bond strength.


Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00