Ultra-high performance shotcrete: yes we can!

Author(s) : L. Trucy, S. Dobrusky, E. Bonnet
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: 154 - 163
Total Pages : 11
Language : English

Abstract: There is nowadays a growing need for durable repair and retrofitting techniques, for tunnels, culverts, port infrastructures etc. Actually UHPFRC is ideal, given its superior mechanical and durability properties. However, up to now this material was only applied by conventional gravity casting. However, when the surfaces are vertical and/or complex, the casting of thin layers against existing old concrete is not an easy task. To fit this need, LafargeHolcim is developing sprayed UHPFRC. From a mix-design perspective, the novelty lies in the fresh state behavior of the fresh mix: a high yield stress combined with a moderate plastic viscosity. It should be outlined that this unusual fresh behavior does not affect the hardened concrete properties. Tests will be presented, in which the material is pumped and sprayed by the wet process. The fiber orientation is investigated through tomography and flexural tests in several directions. Mechanical properties and durability results are shown.

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