Long-term material performance checked on world's oldest UHPFRC road bridges at Bourg-Lès-Valence

Author(s): F. Toutlemonde, P. Roenelle, Z. Hajar, A. Simon, R. Lapeyrère, R-P. Martin, S. Ramanich, L. Baron
Paper category: Symposium
Book title: RILEM-fib-AFGC International Symposium on Ultra-High Performance Fibre-Reinforced Concrete
Editor(s): F. Toutlemonde, J. Resplendino
Print ISBN: 978-2-35158-130-8
e-ISBN: 978-2-35158-131-5
Publisher: RILEM Publications S.A.R.L
Pages: 265– 274
Total Pages: 10
Language: English

Abstract: 
Overpasses OA4 and OA6 at Bourg-lès-Valence in South-Eastern France are the world’s oldest road bridges made of ultra-high performance fibre-reinforced concrete (UHPFRC). They were completed in 2001. From opening to traffic in 2002, no significant maintenance operation has been done. After a decade, the bridges have deserved a detailed survey, deflections were measured and cores were drilled from end transverse zones of one of the bridges spans for long-term performance investigation. Although surface corrosion of the fibres is visible for lower ends of the beams lower flanges, where the surrounding atmosphere is rather humid, fibres are sound in the whole volume of the drilled cylinders, which confirms the high potential durability of the material. Based on characteristics measured on the drilled specimens, the paper details the performance obtained from the tests carried out on the twelve-year old material as compared to the data identified during control of the construction, and concludes on the experience gained.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00