Effect of steel fiber shape on pullout behavior of autoclaved UHPFRC with granite powder

Author(s) : T. Ji, X. Lin, Y. Liang, Z. Yang, B. Chen
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. Resplendino
Print-ISBN : 978-2-35158-166-7
e-ISBN : 978-2-35158-167-4
Publisher : RILEM Publications SARL
Publication year : 2017
Pages: 29 - 36
Total Pages : 8
Language : English

Abstract: Based on a single fiber pullout test, the bonding strength and the pullout energy between the fibers and ultra-high performance fiber reinforced concrete (UHPFRC) were measured. Five types of steel fibers include straight steel fiber (S), single-linear hooked-end steel fiber (G1), bi-linear hooked-end steel fiber (G2), crimped steel fiber (L1) and small crimped steel fiber (L2). The study results show that, L2 was broken when pulled out from UHPFRC, which is not suitable to be used in UHPFRC. Because of the better mechanical interlocking effect between the fibers of G1, G2, L1 and UHPFRC compared to S. Both the bonding strength and pullout energy are G1 > G2 > L1 > S. G1 with only one hook and a larger angle at its end hook has the best shape in the five types of steel fiber, and its strengthening and toughening effect is the best, which is suitable to be used in the UHPFRC with granite powder.

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