Autogenous shrinkage is the main driving force for internal deformations in ultra-high performance fibre-reinforced concretes (UHPFRC). Autogenous deformations and viscoelasticity are determined with free and restrained shrinkage tests for one kind of UHPFRC at an early age. The magnitude of free autogenous shrinkage is very strong during the first hours after hardening with 150 μm/m at 48 h and 325 μm/m at seven days. Long-term tests show that autogenous shrinkage becomes virtually constant at 90 days. The creep deformations of the fully restrained test amount to 60% of the free shrinkage deformations. Another experimental programme conducted on composite ‘UHPFRC–concrete’ beams shows that their time-dependent deformations are strongly influenced by the autogenous shrinkage of UHPFRC; however no visible cracking is induced in the structural elements.
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April 2006
Research Article|
April 01 2006
Autogenous deformations and viscoelasticity of UHPFRC in structures. Part I: experimental results
K. Habel;
K. Habel
*
Maintenance and Safety of Structures, Ecole Polytechnique Fédérale de Lausanne (EPFL)
Station 18, GC B2·402, CH-1015 Lausanne, Switzerland
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J.-P. Charron;
J.-P. Charron
†
Ecole Polytechnique de Montréal
Case Postale 6079, Montréal, Québec, H3C 3A7 Canada
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E. Denarié;
E. Denarié
*
Maintenance and Safety of Structures, Ecole Polytechnique Fédérale de Lausanne (EPFL)
Station 18, GC B2·402, CH-1015 Lausanne, Switzerland
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E. Brühwiler
E. Brühwiler
*
Maintenance and Safety of Structures, Ecole Polytechnique Fédérale de Lausanne (EPFL)
Station 18, GC B2·402, CH-1015 Lausanne, Switzerland
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Publisher: Emerald Publishing
Received:
December 20 2004
Revision Received:
August 03 2005
Accepted:
December 06 2005
Online ISSN: 1751-763X
Print ISSN: 0024-9831
© 2006 Thomas Telford Ltd
2006
Magazine of Concrete Research (2006) 58 (3): 135–145.
Article history
Received:
December 20 2004
Revision Received:
August 03 2005
Accepted:
December 06 2005
Citation
Habel K, Charron J, Denarié E, Brühwiler E (2006), "Autogenous deformations and viscoelasticity of UHPFRC in structures. Part I: experimental results". Magazine of Concrete Research, Vol. 58 No. 3 pp. 135–145, doi: https://doi.org/10.1680/macr.2006.58.3.135
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