UHPFRC tensile creep at early age

Ultra high performance fibre reinforced concrete (UHPFRC) early age viscoelastic behaviour under tension was investigated. The tests results showed a high creep potential due to the high volume paste (88%). This result is of major importance because the viscoelastic properties contribute to mitigating the high early age stresses generated under restrained shrinkage. This beneficial effect was reflected by the increased linear-relationship between tensile creep and shrinkage. As expected, UHPFRC tensile creep behaviour was also sensitive to the loading level. Above 35% of the tensile strength at the loading age, the material exhibited viscoplastic behaviour. A Maxwell chain model was applied to predict the early age UHPFRC tensile creep and confirms the induced non-linear response.


Publié dans:
Materials and Structures, 42, 1, 113-122
Année
2009
Publisher:
Springer Netherlands
ISSN:
1359-5997
Mots-clefs:
Note:
National Licences
Laboratoires:




 Notice créée le 2009-06-16, modifiée le 2019-05-22

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