Karbonisierung von Industrieabfällen für nachhaltige Bindemittel

Project Description

Billions of tonnes of Ca/Mg-silicate minerals have been identified for CO2-mineralization as source for CO2-disposal since the initial proposition of the concept almost three decades ago. However, little attention has been given to approaches for the utilization of the potential billions of tonnes of carbonated by-products of this process. Our initial studies and recent literature indicate that such by-products are rich in amorphous alumina-silica, in addition to the Ca/Mg-carbonates. Such compositions indicate their potential application to produce low-carbon cement analogous to the presently marketed limestone-pozzolana-OPC cements. Therefore, this project uses accelerated carbonation reactions as tools to maximize cementitious reactivity of such materials to produce low-carbon cement. The indirect CO2-offset by such utilization is expected to be significantly higher than their direct CO2-mineralization potentials.

This project focuses on the utilization of carbonated ferrous metallurgical slags ferrous metallurgical slags (FMS) as supplementary cementitious material (SCM) to partially replace Ordinary Portland cement (OPC). For the development of such technology, it is imperative to analyse the whole life-cycle footprint of the proposed process and the product. Therefore, the cradle-to-grave environmental impact of the proposed material will be analyzed and compared with the other standard and sustainable binders.