Publication

Towards more efficient structures with composite UHPFRC-concrete construction

Eugen Brühwiler, Emmanuel Denarié
2006
Conference Papers

Abstract

The extremely low permeability of Ultra High Performance Fibre Reinforced Concretes (UHPFRC) associated to their outstanding mechanical properties make them especially suitable to locally "harden" reinforced concrete structures in critical zones subjected to an aggressive environment and to significant mechanical stresses. UHPFRC provide a unique and robust solution to simplify the construction process, dramatically reduce the duration of sites, and save money thanks to a long term durability. UHPFRC can be applied on existing or new structures as thin watertight overlays, replacing waterproofing membranes, or as protective layers on walls. They can also be combined to reinforcement bars to improve the stiffness and load-carrying capacity, or used as prefabricated elements such as kerbs. Composite UHPFRC-concrete structures promise a long-term durability which helps to avoid multiple interventions during service life. The project SAMARIS (Sustainable and Advanced MAterials for Road InfraStructures) of the European Community (5th Framework program) dedicated a major effort to demonstrate the applicability of UHPFRC for the rehabilitation and improvement of structures. In this context an extensive research and development program was conducted including laboratory tests as well as full-scale pilot tests of application on sites. The following paper reports on the major results achieved in this context with a focus on two main aspects: (1) the underlying more fundamental aspects related to the potential of UHPFRC in the tensile hardening domain, (2) the experiences gathered during first full scale tests of applications, in Switzerland. In conclusion, an insight will be given on ongoing or foreseen applications

Official source

https://infoscience.epfl.ch/entities/publication/5b502dd5-da67-4b7c-a22d-15961c31fd4b

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Eugen Brühwiler, Emmanuel Denarié
2006
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5b502dd5-da67-4b7c-a22d-15961c31fd4b

About this result

Related concepts (32)

Reinforced concrete

Reinforced concrete, also called ferroconcrete, is a composite material in which concrete's relatively low tensile strength and ductility are compensated for by the inclusion of reinforcement having higher tensile strength or ductility. The reinforcement is usually, though not necessarily, steel bars (rebar) and is usually embedded passively in the concrete before the concrete sets. However, post-tensioning is also employed as a technique to reinforce the concrete. In terms of volume used annually, it is one of the most common engineering materials.

Stress (mechanics)

In continuum mechanics, stress is a physical quantity that describes forces present during deformation. An object being pulled apart, such as a stretched elastic band, is subject to tensile stress and may undergo elongation. An object being pushed together, such as a crumpled sponge, is subject to compressive stress and may undergo shortening. The greater the force and the smaller the cross-sectional area of the body on which it acts, the greater the stress. Stress has units of force per area, such as newtons per square meter (N/m2) or pascal (Pa).

Data structure

In computer science, a data structure is a data organization, management, and storage format that is usually chosen for efficient access to data. More precisely, a data structure is a collection of data values, the relationships among them, and the functions or operations that can be applied to the data, i.e., it is an algebraic structure about data. Data structures serve as the basis for abstract data types (ADT). The ADT defines the logical form of the data type. The data structure implements the physical form of the data type.

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