OPTIMIZED DESIGN OF ULTRA-HIGH PERFORMANCE FIBRE REINFORCED CONCRETE (UHPHFRC): TOWARDS TO A SMART CONTROL OF THE FIBRES

Author(s): Qiulei Song, Rui Yu , Zhonghe Shui, Xinpeng Wang and Suduan Rao
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: 563-571
Total Pages: 9
Language : English

Abstract: This study addresses an optimization of fibre orientation and distribution for a sustainable
Ultra-High Performance Fibre Reinforced Concrete (UHPFRC). The purpose of this research
is to propose an efficient method that can improve the fibre efficiency in the UHPFRC and
understand the intrinsic mechanism. The UHPFRC skeleton is designed by employing
particle densely packing model (Andreasen & Andersen model). Based on appropriate
application of superplasticizers and fibres, a UHPFRC with high flowability is firstly
produced, and two cast methods are utilized in this study. The obtained results show that the
fibres orientation and distribution can be significantly influenced by the fresh UHPFRC
flowing parameters, (e.g. flowing direction, flowing distance and wall effects), and the
flowing process of fibres in the fresh UHPFRC can be generally divided into: disorder period,
stable period and re-disorder period. Additionally, the added fibre dosage is also a key factor
for obtaining an optimized UHPFRC, since the interactions between single fibres have close
relationship with their dynamic movement during the UHPFRC flowing process.

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