Self-compacting fibre reinforced concrete extends the versatility of concrete as a construction material, by providing an effective method of overcoming its intrinsic brittleness, and by simplifying the activities necessary for the RC structures construction. The behaviour of this material has been studied by many researchers but the level of knowledge concerning its long term behaviour is still limited. This work describes the first results of an experimental campaign aimed at investigating and comparing the long term behaviour of self-compactingconcrete beams containing steel fibres as well as standard re-bars. In the first stage of the tests the beams were notched in the mid-span section and loaded in order to pre-crack the concrete up to an opening of 0.2 mm. In the second stage of the tests the long term behaviour of the beams was studied by monitoring the mid-span deflection and the crack opening for 200 days, during which the beams were loaded using a four point bending scheme. During this phase the beams were kept in climate controlled room. The results show that the steel fibres are able to reduce, respect to the conventional reinforcement, the crack opening also under long-term loading thus improving the durability and reducing the deformability.

Buratti N., Mazzotti C. (2009). Long term behaviour of self compacting fibre-reinforced concrete beams. BAGNEUX : RILEM.

Long term behaviour of self compacting fibre-reinforced concrete beams

BURATTI, NICOLA;MAZZOTTI, CLAUDIO
2009

Abstract

Self-compacting fibre reinforced concrete extends the versatility of concrete as a construction material, by providing an effective method of overcoming its intrinsic brittleness, and by simplifying the activities necessary for the RC structures construction. The behaviour of this material has been studied by many researchers but the level of knowledge concerning its long term behaviour is still limited. This work describes the first results of an experimental campaign aimed at investigating and comparing the long term behaviour of self-compactingconcrete beams containing steel fibres as well as standard re-bars. In the first stage of the tests the beams were notched in the mid-span section and loaded in order to pre-crack the concrete up to an opening of 0.2 mm. In the second stage of the tests the long term behaviour of the beams was studied by monitoring the mid-span deflection and the crack opening for 200 days, during which the beams were loaded using a four point bending scheme. During this phase the beams were kept in climate controlled room. The results show that the steel fibres are able to reduce, respect to the conventional reinforcement, the crack opening also under long-term loading thus improving the durability and reducing the deformability.
2009
2nd International Symposium on Design, Performance and Use of Self-Consolidating Concrete
1
10
Buratti N., Mazzotti C. (2009). Long term behaviour of self compacting fibre-reinforced concrete beams. BAGNEUX : RILEM.
Buratti N.; Mazzotti C.
File in questo prodotto:
Eventuali allegati, non sono esposti

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11585/85137
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? 0
social impact