Effects of delayed ettringite formation on reinforced concrete structures

Abstract : The prediction and reassessment of mechanical behaviour of reinforced structures affected by delayed ettringite formation (DEF) is a major challenge for structure managers. Firstly, several experimental tests were performed in laboratory to study the influence of both uni and tri-axial reinforcements on DEF expansion. Strain decreases in reinforced directions were observed, proving that DEF expansion under restraint is anisotropic. Cracks were observed parallel to the restrained directions. No strain trans-fert occurs from restrained directions to other ones. Secondly, data provided by these results are used to fit a numerical finite element model taking into account both chemical and mechanical aspects of DEF. Finally, an element of a DEF damaged structure is modelled with the whole model and compared to on site observations.
Complete list of metadatas

Cited literature [13 references]  Display  Hide  Download

https://hal.insa-toulouse.fr/hal-02155138
Contributor : Stéphane Multon <>
Submitted on : Thursday, June 13, 2019 - 1:48:39 PM
Last modification on : Tuesday, June 18, 2019 - 1:35:59 AM

File

Thiebaut_Fib_2018.pdf
Files produced by the author(s)

Identifiers

  • HAL Id : hal-02155138, version 1

Citation

Yvan Thiebaut, Stéphane Multon, Alain Sellier, Laurie Lacarriere, Laurent Boutillon, et al.. Effects of delayed ettringite formation on reinforced concrete structures. 12th fib International PhD Symposium in Civil Engineering, 2018, Prague, Czech Republic. pp.1193-1200. ⟨hal-02155138⟩

Share

Metrics

Record views

50

Files downloads

18