Interface shear transfer between precast UHPFRC elements and normal concrete overlay

Author(s) : N. Randl, M. Steiner, T. Mészöly
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: 451 - 460
Total Pages : 10
Language : English

Abstract: Several series of different small scale tests were performed in order to determine the adhesive bond strength between precast UHPFRC elements provided with different surface profiles and subsequently applied NSC. Slant shear tests with variable interface inclination as well as push-out tests consisting of an UHPFRC plate in the middle and two outer NSC plates provided the basis for judging the effect of adhesive bond on the overall interface shear strength. Waffle-like profiles with square-shaped comb indentations proved to be most effective when taking into account both interface shear strength as well as easiness of potential production in a pre-casting plant with the profiled surface on the top side. In order to judge the friction effect after loss of adhesion, some single pull-off friction tests with de-bonded interface were made. In addition to the small scale tests also some larger T-shaped composite beams have been produced and tested in four point bending setups. The T-beams were made of fibre reinforced UHPC with a NSC layer as subsequent supplement on the upper flange.

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

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