New findings and calculation methods

Creeping and shrinking of ultra-high performance concrete (UHPC)

Due to their high strength and durability, ultra-high performance concretes allow realizing particularly exposed building structures. The fact that despite its dense microstructure UHPC is subject pronounced to time- and load-dependent deformations has to be considered in static and structural design. These deformations were thoroughly investigated within the scope of a comprehensive DFG research project [1]. However, this paper can only present a summary of just a few findings obtained in the investigations carried out on two different types of ultra-high performance concrete. The...

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Issue 2014-02 Causes and control

Shrinkage and cracking in high-performance concretes –

Introduction The problem of load-independent cracking in concrete members is as old as the construction method itself. Cracking is primarily caused by thermal, hygric and chemical processes as well as...

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Issue 2018-02 Limestone-based green cements

Predicting concrete shrink-behavior

The cement industry generates about 6% of global CO2 emissions that are primarily caused by the production of Portland cement clinker. A reduction in the clinker content of cement and concrete and its...

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Issue 2017-02 High-strength and ultra-high performance concretes

Improvement of the rheological behavior

At present, high-strength and ultra-high performance concretes gain more and more in importance across the world. They are characterized by an optimized packing of the particles as well as by...

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Issue 2021-02

Sustainable and ecological ultra-high-performance concretes – contradiction or perspective?

Conservation of resources and sustainability are the current global objectives. Improvement of the CO2 balances of cements and concretes are in the focus of scientific studies. Increasing...

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Issue 2020-02 Concrete curing - goals and potentials

Strategies to minimize restraintstresses in conventional reinforced-concrete structures and in particular in water-impermeable structures

The main function of concrete curing is to minimize premature evaporation of water across the concrete surface. Concrete can achieve the desired strength and durability characteristics only if a...

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