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Home arrow Engineering arrow Creep Behaviour in Cracked Sections of Fibre Reinforced Concrete: Proceedings of the International RILEM Workshop FRC-CREEP 2016
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Conclusions

  • - Cracked macro-synthetic fibre reinforced concrete (FRC) has shown significant tensile creep over 8 months even at a stress level as low as 30 % of the average residual tensile strength. Creep should therefore be taken into account in the use of macro-synthetic FRC.
  • - Creep fracture of specimens occurred at 60 and 70 % stress level; hence, such stress levels are not sustainable for cracked macro-synthetic FRC.
  • - Mechanisms responsible for the creep of cracked macro-synthetic FRC are the time-dependent fibre pull-out and fibre creep under sustained loadings.

References

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  • 4. Bazant, Z.P., Hauggaard, A., Baweja, S., Ulm, F.: Microprestress-solidification theory for concrete creep. I: aging and drying effects. J. Eng. Mech. 123(11), 1188-1194 (1997)
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  • 9. Zerbino, R.L., Barragan, B.E.: Long-term behaviour of cracked steel fibre-reinforced concrete beams under sustained loading. ACI Mater. J. 109(2), 215-224 (2012)
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  • 13. Bernard, E.S.: Influence of fiber type on creep deformation of cracked fiber-reinforced shotcrete panels. ACI Mater. J. 107, 474-480 (2010)
  • 14. Garcia-Taengua, E., Arango, S., Marti-Vargas, J.R., Serna, P.: Flexural creep of steel fiber reinforced concrete in the cracked state. Constr. Build. Mater. 65, 321-329 (2014)
  • 15. Arango, S.E., Serna, P., Marti-Vargas, J.R., Garcia-Taengua, E.: A test method to characterize flexural creep behaviour of pre-cracked FRC specimens. Exp. Mech. 52, 1067-1078 (2012)
  • 16. Zhao, G., di Prisco, M., Vandewalle, L.: Experimental investigation on uniaxial tensile creep behavior of cracked steel fiber reinforced concrete. Mater. Struct. 48, 3173-3185 (2014)
  • 17. Buratti, N., Mazzotti, C.: Experimental tests on the effect of temperature on the long-term behaviour of macro-synthetic fibre reinforced concretes. Constr. Build. Mater. 95, 133-142 (2015)
  • 18. BS EN 12350-2, ‘Testing fresh concrete - Slump test’, (BSI, London, 2000).
  • 19. Rocstay. Polypropylene fibres for concrete and mortar reinforcement. Technical Data sheet. A publication of Fibsol (Fibre reinforcing solution), South Africa.

Part V

Influence of Applied Load on Creep Tests

 
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