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Ultra-High Performance Concrete UHPC: Fundamentals, Design, Examples



Ultra-High Performance Concrete UHPC: Fundamentals, Design, Examples


Selected chapters from the German concrete yearbook are now being published in the new English "Beton-Kalender Series" for the benefit of an international audience.
Since it was founded in 1906, the Ernst & Sohn "Beton-Kalender" has been supporting developments in reinforced and prestressed concrete. The aim was to publish a yearbook to reflect progress in "ferro-concrete" structures until - as the book's first editor, Fritz von Emperger (1862-1942), expressed it - the "tempestuous development" in this form of construction came to an end. However, the "Beton-Kalender" quickly became the chosen work of reference for civil and structural engineers, and apart from the years 1945-1950 has been published annually ever since.
Ultra high performance concrete (UHPC) is a milestone in concrete technology and application. It permits the construction of both more slender and more durable concrete structures with a prolonged service life and thus improved sustainability.
This book is a comprehensive overview of UHPC - from the principles behind its production and its mechanical properties to design and detailing aspects. The focus is on the material behaviour of steel fibre-reinforced UHPC. Numerical modelling and detailing of the connections with reinforced concrete elements are featured as well. Numerous examples worldwide - bridges, columns, façades and roofs - are the basis for additional explanations about the benefits of UHPC and how it helps to realise several architectural requirements.
The authors are extensively involved in the testing, design, construction and monitoring of UHPC structures. What they provide here is therefore a unique synopsis of the state of the art with a view to practical applications.
1. Introduction
2. Principles for the production of UHPC
2.1 Development
2.2 Basic material concepts
2.3 Raw materials
2.4 Mix composition
2.5 Mixing
2.6 Curing and heat treatment
2.7 Testing
3. Mechanical properties of the hardened concrete
3.1 General
3.2 Behaviour in compression
3.3 Behaviour in tension
3.4 Shrinkage
3.5 Creep
3.6 Multi-axial stresses
3.7 Fatigue behaviour
3.8 Dynamic actions
3.9 Fire resistance
3.10 UHPC with combinations of fibres (fibre cocktails)
4. Durability
4.1 Microstructure
4.2 Resistance to aggressive media
4.3 Classification in exposure classes
5. Design principles
5.1 Influence of fibre distribution and fibre orientation
5.2 Analyses for the ultimate limit state
5.3 Analyses for the serviceability limit state
6. Connections
6.1 General
6.2 Dry joints
6.3 Glued joints
6.4 Wet joints
6.5 Grouted joints
6.6 Adding UHPC layers to existing components to upgrade structures
7. Projects completed
7.1 Bridges
7.2 Applications in buildings
7.3 Other applications
8. Acknowledgements
9. References