COLD JOINTS OF THIN-WALLED UHPFRC STRUCTURES

Author(s): David Citek, Stanislav Rehacek, Petr Tej, Jiri Kolisko
Paper category: Proceedings
Book title: Proceedings of the 2nd International Conference on UHPC Materials and Structures (UHPC2018-China)
Editor(s): Caijun Shi and Baochun Chen
ISBN: 978-2-35158-219-0
e-ISBN: 978-2-35158-220-6
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 763-769
Total Pages: 7
Language : English

Abstract: Ultra-High Performance Fiber Reinforced concrete might be used for a specific application
with very complex design and very complex shape. Because of high durability and excellent
material properties, innovative (thin-walled, shell) structures should be designed. Usually, in
design UHPFRC structure a reinforcement bars are replaced by a scattered reinforcement.
Load bearing capacity in bending of the final shell or thin-walled structure might be
influenced by many other factors, including fiber distribution, type and orientation, casting
position (for example for up-side down casting) of the shell part of the structure and others.
Very significant factor should be a cold joint in term of possible time delay between two
batches (simulation of breakdown of the mixer, waiting time to air leakage). At the actual
paper focus on an experimental program on cold joint between two batches of fresh UHPFRC
poured into the thin wall and deck panels with longitudinal rib. These cold joints are caused
by time delay between previous and next batch. Time between two batches differs in range of
10 – 90 minutes.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00