Innovative, unbounded prestressing

Precast floor slab made of carbon-reinforced concrete

As part of the C ³ research project on carbon-reinforced concrete, an unbounded prestressing system has been developed, in particular, taking the requirements of building construction into account (sub-project V4.2 prestressed carbon-reinforced concrete). The flexible system – post tensible, reusable, modular – is composed of a friction clamp anchoring and a CFRP laminate as tension member. With the collaboration of the C³ project V1.5 Recycling and reusability of carbon-reinforced concrete, two floor elements were implemented, which take the historical Möller Girder up by their shape followin...

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Issue 2022-06

Lightweight, prestressed carbon-reinforced concrete floor slabs – New perspectives for the precast industry

Since the 1930s, numerous prestressed thin-walled building elements, prestressed both with and without bond, have been used in construction worldwide. Examples range from buildings with simple slab...

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Issue 2021-02

Carbon prestressing – New floor cross-sections for building construction

Owing to the significant share of cement production, building with concrete generates about 8?% of global CO2 emissions while also contributing to the imminent worldwide depletion of sand and gravel...

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Issue 2009-08 An alternative to reinforced concrete

Use of prestressed concrete in floor slab production

Precast prestressed floors slabs from Echo-Elbe consist of a lower and upper concrete layer connected to each other via the webs. The prestressed strands and/or wires in sizes 5.7, 9.3 mm and 12.5...

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Issue 2015-02 Market potential in bridge infrastructure

Use of carbon-reinforced shotcrete to increase the shear resistance of prestressed-concrete girders

The German highway network includes over 39,000 bridges with a total length of almost 2,100 km. Most of these bridges were built from prestressed concrete in the period from 1965 to 1985 (Fig. 1)....

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Issue 2017-05 Dennert

Prestressed precast floor slabs: large spans and load ­capacities – including heating and cooling function

In particular, if architecture is using free design for interior space and very large distances have to be spanned, prestressed precast floor slabs of Dennert provide a wide variety of options – even...

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