Innovative rehabilitation technology for corrugated metal pipe culverts using wet-mix sprayed UHPFRC

Author(s) : A. Huynh, B. Petit, F. teply, C. Larive
Paper category : Proceedings
Book title : UHPFRC 2017 Designing and Building with UHPFRC: New large-scale implementations, recent technical advances, experience and standards
Editor(s) : F. Toutlemonde & J. ResplendinoT.Ch.
Print-ISBN : 978-2-35158-166-7
e-ISBN : 978-2-35158-167-4
Publisher : RILEM Publications SARL
Publication year : 2017
Pages: 717 - 724
Total Pages : 8
Language : English

Abstract: The rehabilitation of corrugated metal pipe culverts under roads and highways using an inner ultra-thin concrete shell made of sprayed UHPFRC provides road owners with a strengthening solution that is about the same price but more robust than traditional solutions, allowing them to select the best technical and financial solutions for their projects, while ensuring the safety of the users and the durability of the structures. Developing sprayed UHPFRC for structural repair and strengthening marks a technological leap, in particular the development of integrated equipment for on-site fabrication, pumping and spraying. It was a major challenge that Freyssinet wanted to take up before deploying the technology for a broad spectrum of applications. This equipment was designed and successfully tested under site conditions in the year 2017 by Freyssinet in preparation of the execution of an experimental construction project for retrofitting a corrugated steel pipe culvert by sprayed Ductal®; the project is being carried out under the aegis of CETU and CEREMA as part of the innovation award "Routes et Rues 2016” granted to Freyssinet and LafargeHolcim.

Online publication : 2017
Publication type : full_text
Public price (Euros) : 0.00

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