Resource Efficient Processes

KreislaufKIT | ITC | Markus Oberacker 2022

We design processes for a circular economy in the minerals industry to recycle primary and secondary raw materials. Such matter is predominantly used in construction, implying large quantities and the opportunity for quality recycling, at best as a new binder substituting cement.

Starting Points: CO2 Emission and High Quality Recycling

There are two important and recurring topics:

a) synthesis processes are always connected to huge CO2 emissions because of the calcium involved and

b) recycling of e.g. concrete from demolition or mixed construction waste is in many cases actually downcycling as sub-construction of roads and disposal sites or mine backfilling - and not for re-introduction into production.

Goals: Waste to Binder

Crushed fines of concrete or production wastes are waste fractions with low grade...

...usage or even none at all. We design energy and material efficient processes and collaborate intensively with companies of waste processing, production, and application to use these materials for the replacement of primary resources for cement oder construction materials.

Collaboration aerated concrete

The goal of our Projekt Repost it's to convert production wastes of aerated concrete into a belite binder replacing ordinary cement in the manufacturing of autoclaved aerated concrete.

Repost: Recycling-Cluster Porenbeton - Optimierung von Rückbau und Sortierung von Altporenbeton und Erarbeitung neuer Optionen für die Kreislaufführung von Porenbeton; BMBF FKZ 033R249D (2019-2022): KIT mit ITC und IIP sowie Otto Dörner GmbH und Xella

Funding for Pilot Plant

Based on our new process...

Based on our new process we are going to build a pilot named R-Zement to synthesis new binders from secondary raw materials or wastes like concrete fines or autoclaved aerated concrete.

R-Zement: CO2-arme Herstellung des Klinkerminerals Dicalciumsilikat aus Recycling-Baustoffen (R-Zement) LUBW FKZ L7521115

Hunsinger, Hans; Beuchle, Günter; Stemmermann, Peter; Schweike, Uwe; Warzycha, K.; Garbev, Krassimir: Verfahren zur Herstellung von Dicalciumsilikat. WO 2014/019656 A1. Prioritätsdaten: 1.10.2012