Verarbeitung von UHPC

Molding and heat curing of UHPC

Various molding processes can be used for producing UHPC components, such as grouting, casting or extrusion. Casting is most commonly used. UHPC with good rheological characteristics is suitable for manufacturing precast elements in complex shapes. Fig. 1 shows the “kicker” (soccer table) that was produced from UHPC at the cbm (Centrum Baustoffe und Materialprüfung; Center for Building Materials and Materials Testing at Munich University of Technology).

Rheological properties such as viscosity, yield limit and thixotropic behavior are key to ensuring an impeccable molding process. These characteristics can be achieved by optimizing the mix design, selecting a suitable type and amount of plasticizer or applying an appropriate mixing process. For instance, additives such as silica dust, fly ash, limestone dust or blast-furnace slag have a significant influence on the amount of plasticizer required and thus on concrete workability. The use of limestone dust or silica dust with a lower specific surface considerably improved the workability...

Related articles:

Issue 2011-10 Heat curing and autoclaving of UHPC

New perspectives for the precast concrete industry

In the autoclaving process, the concrete is additionally subjected to water vapor pressure, which significantly improves the conditions for hydration. This method is known from the autoclaved aerated...

Issue 2013-02 Research for new markets

High-performance concretes

High-performance concrete as a challenge Ultra-high performance concretes (UHPCs) are building materials with an extremely dense matrix whose properties are very similar to those of steel. Factors...

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...

Issue 2011-01 World‘s First Stairs Made of White, Ultra High Performance Concrete

Dyckerhoff Weiss at the BAU 2011 in Munich

They play in the Champions League of building materials: Ultra high performance concretes – UHPC for short. A very special application can be seen at the Dyckerhoff Weiss trade fair booth at the BAU...


Innovation: Nanodur E80 high-performance concrete

UHPC is a fascinating material; Nanodur E80 concrete, one of the winners of the Innovation Prize 2016, elevates it to the next level. The Nanodur Compound 5941 premixed binder is combined with a...