Upgrading of existing bridge decks using UHPFRC densified by ettringite formation (AFT-UHPFRC): preliminary investigation

Author(s) : T. Makita, Y. Watanabe, S. Yanai, T. Ichinomiya
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: 125 - 134
Total Pages : 10
Language : English

Abstract: Bridge deck is one of the structural elements subjected to severe mechanical actions and environmental conditions. Addition of UHPFRC layer on top of bridge decks can take full advantage of UHPFRC’s excellent mechanical and transport properties. The paper presents investigation results from the first stage of a project to develop an upgrading method of existing bridge decks using cast-in-situ UHPFRC. The UHPFRC mix used in the research is characterised by its matrix densified by ettringite (AFt) formation; thus, it is called “AFt-UHPFRC”. The AFt-UHPFRC was originally developed for fabrication of precast members with thermal curing and hasn’t been applied to existing structures by in-situ casting. In order to understand the behaviour of the AFt-UHPFRC as material for upgrading of existing concrete bridge decks, experimental investigation was conducted. The experimental results were analysed and necessity to modify the present AFt-UHPFRC mix composition to be suitable for upgrading of existing concrete bridge decks was identified.

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