Ultra-high performance concretes

Cementitious high-tech materials for industrial applications

Today, the superior strength and surface properties of UHPC and its high degree of sustainability [4] make it the material of choice not only for major solitary structures on the basis of individual approvals but also for the serial production of components. However, the production of ultra-high-performance concretes from locally available raw ­materials is worth a closer look from an environmental and, in particular, economic perspective. Such a production scheme makes the precast plant largely autonomous in terms of the composition of the material and its handling.

During its four years of existence, G.tecz has already managed more than 50 research and development projects for using ultra-high performance concretes in industrial applications. This article presents some of these UHPCs, with varying scopes of application.

In this contribution, the term of ultra-high performance concrete (UHPC) is also used for concretes that do not provide a mean minimum compressive strength of 150 N/mm2 but have, for example, a lower compressive strength but significantly higher tensile strength whilst providing a lesser degree of brittleness combined with a significantly...

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Issue 09/2020

Compressive strength classes and performance classes of ultra-high-performance concrete (Part 1)

1 Introduction The spectrum of normal weight concretes covered by DIN EN 206 [1] and DIN EN 1992-1-1 [2, 3] ends at compressive strength class C100/115 in Germany at present. The characteristics...

Issue 02/2018 Part 1: Concrete technology and execution

The new DAfStb Guideline on UHPC

On a worldwide scale, ultra-high-performance concrete (UHPC) has been the single most important development of the past few decades in the field of concrete technology and application. This type of...

Issue 02/2015 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...

Issue 10/2020

Compressive strength classes and performance classes of ultra-high-performance concrete (2)

3 Classification of UHPFRC in tension 3.1 Parameters and test method The axial post-cracking tensile strength (notation: fcft) is the most important material parameter of ultra-high-performance...

Issue 10/2011 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...