New polymorphous CaCO3-based ­cementitious materials
Part 2: Calera – a technology assessment

1 Flue gas from coal and gas power plants as CO2-source
1 Flue gas from coal and gas power plants as CO2-source
2 Assumed process flow of the production of vaterite (CaCO3)
2 Assumed process flow of the production of vaterite (CaCO3)
3 Pipe lines and settling tanks of the closed Steetley magnesite factory at Hartlepool (annual capacity: 10 000 t magnesia), where magnesia was extrac­ted from sea water Quelle/Source: Beamish Museum
3 Pipe lines and settling tanks of the closed Steetley magnesite factory at Hartlepool (annual capacity: 10 000 t magnesia), where magnesia was extrac­ted from sea water
Quelle/Source: Beamish Museum
4 Global map of selected ocean board coal power plants (< 10 km distance)
4 Global map of selected ocean board coal power plants (< 10 km distance)
5 World consumption of HCl (estimated 20 million t) for the year 2008 [18]
5 World consumption of HCl (estimated 20 million t) for the year 2008 [18]
Antetype for Calera technology: construction of corals and sea shell
Antetype for Calera technology: construction of corals and sea shell

 “Green cements” with the potential to significantly reduce CO2 emissions are still in the focus of attention in the cement industry.

1 Introduction

Due to the high CO2 emissons of conventional cement production currently a range of concepts for alternative “green cement” is investigated by engineers and researchers from within and outside the cement community. All of these approaches aim to partly reduce or even replace Ordinary Portland Cement (OPC). Due to the claimed potentials as well as the expectable effects it is the aim of the Institute for Technology As­sessment and Systems Analysis (ITAS) work to assess these approaches in how far they really can lead to mass construction materials and compete against OPC. This...
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ZKG 03/2013

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ZKG 03/2013

Ressort:  Materials
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TEXT Matthias Achternbosch, Ulrich Dewald, Christel Kupsch, Eberhard Nieke, Gerhard Sardemann, Karlsruhe Institute for Technology (KIT)

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