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Concrete behaviour and crack control of prestressed concrete beams with fibres



Author(s): A. Kohoutková, I. Broukalová
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: 1432 - 1443
Total Pages: 9
Language: English


Abstract: 
Significance of fibres in FRC (fibre reinforced concrete) is not only in improvement of the performance of FRC in comparison to the plain concrete but also in application in members with rebar reinforcement – reinforced concrete structures and prestressed structures. FRC provides higher ductility, profitable layout of cracks, eventually higher tensile strength; some types of fibres may prevent excessive cracking due to shrinkage at early stages of concrete hardening. Utilisation of fibre reinforced concrete is efficient particularly in precast members. Production control in precast plants provides better quality of concrete mixture and guaranteed material properties of SFRC.

In present bad economic situation the producers´ market strategy aims to higher efficiency of the production and advantageous offers for customers. The decrease of the price of product can lead to increasing sales and thus earnings for the producer. Nevertheless the utilisation of fibre reinforced concrete in precast members and in structures in general is not very often in the Czech Republic although it may bring benefits regarding savings of workability, decrease of rebar steel consumption and favourable behaviour of the structural element. Presented precast girder for the foot-bridge is one of the rare exceptions of application of SFRC in structural use.


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


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