Flowable concrete (either compacted with some vibration or self-compacting) is becoming a more and more widely applied building material. Due to its flowable nature, reinforcing bars can become an obstacle, mixture components may float or segregate and the casting technique determines the orientation of fibres, if any. An increasing range of components is available to optimize their mixture composition to achieve both rheological characteristics and hardened state properties which are more suitable to the selected application. As a result, concrete optimization becomes a crucial task to the development of successful applications. In April 2009, fib-Task Group (TG) 8.8 'Structural Design with Flowable Concrete' started to facilitate the use of innovative flowable materials for the design of concrete structures. Taking into account research findings and practical experience, the main objectives of fib TG 8.8 are to write a state-of-the-art report and recommendations on the structural design with flowable concrete. fib TG 8.8 considers three aspects of flowable concrete: material properties, casting (production and manufacturing) techniques and boundary conditions of a structure. This paper presents the scope of fib TG 8.8 concerning the potential and the characteristics of flowable concrete, discusses related design standards and recent developments. fib TG 8.8 aims at promoting the application of flowable concrete and its future implementation in guidelines and codes.

fib Recommendations “Structural Design with floable concrete

FERRARA, LIBERATO;
2010-01-01

Abstract

Flowable concrete (either compacted with some vibration or self-compacting) is becoming a more and more widely applied building material. Due to its flowable nature, reinforcing bars can become an obstacle, mixture components may float or segregate and the casting technique determines the orientation of fibres, if any. An increasing range of components is available to optimize their mixture composition to achieve both rheological characteristics and hardened state properties which are more suitable to the selected application. As a result, concrete optimization becomes a crucial task to the development of successful applications. In April 2009, fib-Task Group (TG) 8.8 'Structural Design with Flowable Concrete' started to facilitate the use of innovative flowable materials for the design of concrete structures. Taking into account research findings and practical experience, the main objectives of fib TG 8.8 are to write a state-of-the-art report and recommendations on the structural design with flowable concrete. fib TG 8.8 considers three aspects of flowable concrete: material properties, casting (production and manufacturing) techniques and boundary conditions of a structure. This paper presents the scope of fib TG 8.8 concerning the potential and the characteristics of flowable concrete, discusses related design standards and recent developments. fib TG 8.8 aims at promoting the application of flowable concrete and its future implementation in guidelines and codes.
2010
Flowable concrete; high-performance concrete; fibres; mixture composition; material characteristics; design recommendation.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11311/574810
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