| Title | Recycling belite cement clinker from post-demolition autoclaved aerated concrete - assessing a new process |
|---|---|
| ID_Doc | 18156 |
| Authors | Stemmermann, P; Volk, R; Steins, JJ; Beuchle, G |
| Title | Recycling belite cement clinker from post-demolition autoclaved aerated concrete - assessing a new process |
| Year | 2024 |
| Published | |
| Abstract | Increasing post-demolition autoclaved aerated concrete (pd-AAC) waste is mainly landfilled due to its physical properties and lacking recycling processes. A promising technology is the production of recycled belite cement clinker, which can partially substitute Portland cement clinker. This paper presents experimental data of recycled belite cement clinker production from pd-AAC that has been successfully demonstrated on technology readiness level 4-5 and its associated lifecycle assessment. Different supply chains for pd-AAC and energy are examined. The closed-loop pd-AAC recycling via the belite route that aims for Portland cement clinker substitution shows significant potential savings in environmental impacts. These savings could reach 0.77 kg CO2-Eq/kg pd-AAC compared to the status quo (landfilling) by using renewable electricity, and 0.34 kg CO2-Eq/kg pd-AAC by using natural gas. The gained reduction of around 13.5 % is significant considering that it is the result of substituting only 15.5 % of the overall input material. |
| https://doi.org/10.1016/j.resconrec.2023.107404 |
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