New binder as substitute for cement

Concrete is by far the construction material manufactured in the largest quantities worldwide. Its enormous significance in the context of the current sustainability assessment demonstrates clearly that the production of the cement needed for its manufacture is held responsible for approx. 7 % of CO2 emissions worldwide. This fact is not new at all, however: the issues of climate change, resource preservation and sustainability are presently in a strong social and political focus of perception. Further, the role of concrete construction and, accordingly, that also of the concrete block industry, is one that should not remain on the sidelines in this context.

In addition to the development and utilization of increasingly more clinker-efficient cements, much potential is seen for innovative binders such as geopolymers, carbosilicate and calcium hydrosilicate binders. These, however, develop their strength partly on the basis of a reaction principle other than hydration, thus departing from the customary field of experience. Some of these binders have already been known for decades and, with a view to their low impact on the environment – especially the CO2 savings potential – are coming again into the focus of interest in research and practice. Their reliability, however, with regard to efficiency and durability, must still be proven in some cases.

This presentation points out the opportunities as well as the limitations of use of new binders of the kind discussed here, in connection with future CO2 neutral concrete block production.


Related articles:

Issue 04/2016

Dosing of small pigment quantities

Manufacturers of cast stone slabs have been using pigments – for example, Bayferrox iron oxide pigments – for coloring their products for many decades. In most cases, the amount of pigment used is...

Issue 02/2021

Sustainable and ecological ultra-high-performance concretes – contradiction or perspective?

Conservation of resources and sustainability are the current global objectives. Improvement of the CO2 balances of cements and concretes are in the focus of scientific studies. Increasing...


Position 01/2016

At this place BFT International – regularly, and in collaboration with the German associations listed below – is publishing the position taken by these organizations on a current issue concerning...

advertorial / advert

Making sustainability of pigments measurable

Currently only a few raw material suppliers offer verified EPDs. Why is this, and what additional value can this kind of environmental information offer? The main purpose of EPDs is to provide...

Issue 07/2016

Sustainable pigment production

The role played by colored concrete in modern architecture is becoming increasingly important. The many large and smaller structures erected in the recent past bear testimony to this development....