Rehabilitation of an old steal railway bridge using UHPFRC - material characteris- tics and casting technology

Author(s): Aljoša Šajna, Irina Stipanović Oslaković, Henar Martín-Sanz, Domagoj Damjanović
Paper category: Proceedings
Book title: Proceedings of the International Conference on Sustainable Materials Systems and Structures (SMSS2019) Durability, Monitoring and Repair of Structures
Editor(s): Ana Baričević, Marija Jelčić Rukavina, Domagoj Damjanović, Maurizio Guadagnini
ISBN: 978-2-35158-217-6
e-ISBN: 978-2-35158-218-3
Publisher: RILEM Publications SARL
Publication year: 2019
Pages: 740-747
Total Pages: 848
Language: English

Abstract: The variety of UHPFRCs (Ultra High Performance Fibre Reinforced Concretes) represents a powerful family of modern cementitious materials, which have proven their superior characteristics over the past 20 years, especially when fast, durable and sustainable rehabilitation of infrastructure is required.
Recently, an in house UHPFRC mix was used for strengthening an existing 9 m long steel railway bridge by casting a thin slab over the main steel girders. The bridge was brought from the railway track to the laboratory where it was meticulously inspected as well as dynamically and statically tested. Based on these observations, a strengthening slab was designed, according Swiss and European technical specifications. Next the UHPFRC formula was designed, taking into consideration the design requirements and the technological limitations, such as mixing, transporting and casting. After the rehabilitation, the bridge was thoroughly inspected and tested again, to evaluate the design model and the efficiency of the rehabilitation.
In this paper the UHPFRC design, mixing, transporting and casting procedures and the material characteristics are presented. Furthermore, the most relevant outcomes of the bridge structural assessment after the addition of UHPFRC deck are described.

Online publication :2019
Publication type : full_text
Public price (Euros) : 00