Are new magnesia-based cements the future?
Part 1: Analysis of former developments
![1 Average fraction of different cement-based products in cement consumption in Germany 2008 [15]](https://www.zkg.de/imgs/101530491_0317834b25.jpg)
![2 The development of global cement production 1990-2008 according to data from the U. S. National Geological Survey Minerals Information Center [14]](https://www.zkg.de/imgs/101530494_3d44f7161d.jpg)
![3 Global magnesite deposits: World reserves: > 12 Billion t magnesite, of which 51 % are from Chinese-North Korea sparry magnesite province [11]](https://www.zkg.de/imgs/101530516_817c37aab7.jpg)
To decrease CO2 emissions in the cement industry, new cement-based binders are in the focus of attention, especially calcium-based systems, geopolymers and new magnesia binders.
1 Introduction
Modern construction materials are based on the hydraulic binder Portland cement, mainly used for manufacturing concrete and next to water, the globally most used material. Currently worldwide more than one tonne of concrete is produced per capita every year.
Cement is mainly used for in-situ concrete and prefabricated construction elements made from concrete. To satisfy this demand in Germany more than 80 % of the cement produced is required (Fig. 1). Plaster, mortar and floating screed as well as special binders like adhesives based on cement are quantitatively only of lower...
