Where can information and educational material on Celitement be obtained for school lessons?

We have some information material that on request we can put together for schools. We have also already given lectures on Celitement and cement production in general at various educational establishments. Just get in touch with the contacts given on the homepage. We will be happy to assist you, where feasible, with further education on building materials.

After strong media coverage between 2010 and 2013 things have become rather quiet around Celitement in recent years – why is this?

In the first few years after we were formed (2009-2011) there was a real boom associated with “green cements”. Many different systems were developed and promoted at the start of 2010. At Celitement GmbH we are rather proud to have one of the very few systems that are still active on the market. Many other projects have not managed to leave the laboratory stage or have now completely vanished from the market. The development of a new binding agent requires immense perseverance and unfortunately also considerable financial funds. The development of completely new building materials is not a short haul, it is a true marathon. And, just as in sport, the marathon gets less coverage in the media than the spectacular sprint events. In most cases with marathons the report covers the start and finish. The many hours between are usually of little interest to the public. This comparison probably fits very well with the current situation with Celitement. Because of the competition with other rival systems that were then still being covered strongly in the press we also had a strong media presence at the start. However, after we had presented the basic principles and the new material systems of Celitement in many publications and lectures it was then a matter of the details of the tedious product optimization, upscaling the process technology and solving a great many problems. This is not very interesting for the media. These results were also often acquired in cooperation with innovators and were then usually subject to secrecy agreements. However, in future we plan to report somewhat more about where we stand and precisely what we are doing. We will update our website and extend it regularly with new information.

Is there a safety data sheet for Celitement?

Yes, the SDS complying with REACH is ready for downloading on our homepage in German and English. It is based on the registration in accordance with REACH (ECHA) that was successfully completed in 2018. This SDS will also be made available on requests for product samples or when service trials are carried out under the following document title: SDS Celitement en V 3.1 SCHWENK REACH 2018-06-12.

Is there a technical information sheet for Celitement?

No, but together with the sample material we hand out a short description about the best way to adjust the workability properties and which superplasticizers (PCE), and at what addition levels, have given us the best results.

Nothing has changed for a long time on the Celitement homepage, why is this?

With the takeover by SCHWENK we have just carried out a revision of the Celitement homepage. The original structure has been retained but we have somewhat changed and expanded the content. As it is our main communications platform we plan in future to expand the homepage of Celitement GmbH still further and report more regularly than in the past on results and new findings. Just keep on looking.

One can read on the internet that Celitement and other new types of “green cements” will not have any real significance for combating climate change as they are only suitable for extremely small niche markets. Is this true?

It is true that there are concepts for “green cements” that, because of the limited available raw material basis, do not have the potential to be produced as mass building materials worldwide in billions of tonnes annually. In addition to this the very good price/performance ratio of classical cement is actually a considerable obstacle for successful entry of new binders into the market, especially in the mass market for concrete. Many “green cements” are therefore diverting into special, high-price, applications with better added value, not least also because of the legal building and normative restrictions. This only applies partially to Celitement as the raw material basis at least is the same as for classical cement. We also require sources of calcium and silicon, the simplest being limestone and sand. This being the case we can definitely see the potential for Celitement to make headway in the mass market in the long term. Perhaps not immediately but in the long run a building material like Celitement definitely has the potential, either alone or in combination with traditional binding agents, to make cement production more climate friendly.

One now sees and hears virtually nothing about new kinds of “green cements” like Celitement. Why is there so little activity in this field when cement production is so CO2-intensive?

That is a very good question and if one examines this problem somewhat more closely it will seen quite quickly that only a few ideas have “survived” the really euphoric phase around 2010. Building materials development requires perseverance and patience and also, unfortunately, substantial financial resources to make the leap from laboratory scale to pilot plant scale and then on to industrial scale. The barriers to entering the market are also high due to the very good price/performance ratio of established binding agents like Portland cement and the strict normative and building legislation regulations currently in force in the mass market. Taken as a whole we are moving in a rather conservative user group that is not prepared to take risks. At the moment we have the impression that the tendency is to follow traditional approaches such as geopolymers, carbonating calcium silicates (e.g. Solidia), calcined clays (e.g. LC3) or to a certain extent still the aluminium- and sulfate-rich systems (BCAF, CSA). We do not know of any truly novel developments on a pilot plant scale that are based on completely different process engineering or material concepts. This means that with Celitement we have a unique product.

What are the most important scientific articles about Celitement and how can I obtain them?

We have made some selected articles available in the download section of our homepage. Whether these are the “most important” depends on the point of view. For copyright law reasons we cannot make all the published documents freely available. However, we plan to draw up a complete list of the publications and media.

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