ABSTRACT
ABSTRACT: This paper describes the design and construction of the third Pinel Bridge in France, in 2007. Located just to the west of Rouen, this small bridge has a single 27-m-long span and is 14-m wide. It will increase the traffic capacity of two existing bridges over three railroad tracks from two lanes to five. The bridge deck combines a conventional slab of standard reinforced concrete with seventeen parallel contiguous beams made of self-consolidating Ultra-High-Performance Fiber-Reinforced-Concrete (UHPFRC). The beams – designed by the contractor, Eiffage TP, as an alternative to a filler-beam deck – are prestressed with 28 internal strands placed in a very wide bottom flange
– Walraven & Stoelhorst (eds) ISBN 978-0-415-47535-8
N. Cauberg & J. Piérard Belgian Building Research Institute, Brussels, Belgium
O. Remy University of Brussels, Brussels, Belgium
ABSTRACT: Evaluating two interesting applications for UHPC, cladding panels and overlays, this project focused on some relevant aspects such as the mix design of UHPC, the shrinkage at early age, the fiber reinforcement and the flexural behaviour. As far as mix design concerns, the research optimized the choice of admixtures, (micro)fillers and the aggregate grading, obtaining a compressive strength between 125 and 180 N/mm2 and excellent flexural behavior with the cocktail of micro-and macrofibers. Both restrained and unrestrained shrinkage have been evaluated, and the results seem not to limit the applications. Two practical applications have been studied and show the potential of this material: thin and large cladding panels with different types of reinforcement, together with new anchorage systems. Secondly, UHPC-overlays for old and new concrete elements seem to be an innovative solution for concrete surfaces exposed to wear or aggressive substances. Modeling and real-scale experiments have been compared for this application.
