Potential and challenges of in situ ATR-FTIR spectroscopy in the analysis of cement hydration: Combined evaluation with in-situ and ex-situ XRD
Ullrich, A.; Garbev, K.; Stemmermann, P.
2026. Cement and Concrete Research, 203, 108185. doi:10.1016/j.cemconres.2026.108185

Assignment of Si-O vibrational modes in the IR spectra of C-S-H phases based on single-crystal polarized IR and Raman spectra of 14 A tobermorite, jennite, and jaffeite
Garbev, K.; Gasharova, B.; Ullrich, A.; Beuchle, G.; Stemmermann, P.
2025. Cement and concrete research, 198, Art.-Nr.: 108000. doi:10.1016/j.cemconres.2025.108000

R-Zement: CO₂-arme Herstellung des Klinkerminerals Dicalciumsilikat aus Recycling-Baustoffen : Berichtsblatt BWPLUS
Stemmermann, P.; Beuchle, G.; Garbev, K.; Precht, U.; Schweike, U.; Ullrich, A.
2025. Ministerium für Umwelt, Klima und Energiewirtschaft / Baden-Württemberg. doi:10.5445/IR/1000187843

Characterisation of Recycled Concrete Aggregates with TGA and XRF coupled with Statistical Data Analysis
Frankenhauser, L.; Garbev, K.; Ullrich, A.; Stemmermann, P.; Stapf, D.
2025, August 12. 4th The 4th International Conference on Sustainable Building Materials (ICSBM 2025), Eindhoven, Netherlands, August 10–13, 2025

Thermodynamic Modelling Approach for the Processing of Low-Temperature Belite Cement Clinker from Concrete Waste Using NaCO & CaCl as Mineralizers
Yarka Reddy, P. R.; Beuchle, G.; Ullrich, A.; Stemmermann, P.; Stapf, D.
2025, August 11. 4th The 4th International Conference on Sustainable Building Materials (ICSBM 2025), Eindhoven, Netherlands, August 10–13, 2025

Mixed-Matrix Organo-Silica-Hydrotalcite Membrane for CO₂ Separation Part 1: Synthesis and Analytical Description
Bünger, L.; Garbev, K.; Ullrich, A.; Stemmermann, P.; Stapf, D.
2024. Membranes, 14 (8), Art.-Nr.: 170. doi:10.3390/membranes14080170

Recyclingcluster Porenbeton (REPOST) - Schlussbericht des Forschungsvorhabens
Beuchle, G.; Garbev, K.; Kreft, O.; Schultmann, F.; Schweike, U.; Steins, J.; Stemmermann, P.; Ullrich, A.; Volk, R.; Weiß, B.
2024. Karlsruher Institut für Technologie (KIT). doi:10.5445/IR/1000173409

Accelerated carbonation of hardened cement paste: Quantification of calcium carbonate via ATR infrared spectroscopy
Kalkreuth, J.; Ullrich, A.; Garbev, K.; Merz, D.; Stemmermann, P.; Stapf, D.
2024. Journal of the American Ceramic Society, 107 (4), 2627–2640. doi:10.1111/jace.19546

Zero emission circular concrete
Stemmermann, P.; Garbev, K.; Ullrich, A.; Beuchle, G.
2023. RILEM Publ

Belite cement clinker from autoclaved aerated concrete waste fines with high sulfate content
Stemmermann, P.; Beuchle, G.; Garbev, K.; Schweike, U.; Ullrich, A.
2023. ce/papers, 6 (2), 203–208. doi:10.1002/cepa.2096

Zero-Emission Circular Concrete
Stemmermann, P.
2023, June 13. Helmholtz Energy Conference (2023), Koblenz, Germany, June 12–13, 2023

Belite cement clinker from autoclaved aerated concrete waste – A contribution towards CO₂-reduced circular building materials
Stemmermann, P.; Ullrich, A.; Beuchle, G.; Garbev, K.; Schweike, U.
2022. ce/papers, 5 (5), 17–26. doi:10.1002/cepa.1879

Chlorellestadite (Synth): Formation, Structure, and Carbonate Substitution during Synthesis of Belite Clinker from Wastes in the Presence of CaCl and CO
Garbev, K.; Ullrich, A.; Beuchle, G.; Bergfeldt, B.; Stemmermann, P.
2022. Minerals, 12 (9), Artikel-Nr.: 1179. doi:10.3390/min12091179

CaCl₂ as a Mineralizing Agent in Low-Temperature Recycling of Autoclaved Aerated Concrete: Cl-Immobilization by Formation of Chlorellestadite
Ullrich, A.; Garbev, K.; Schweike, U.; Köhler, M.; Bergfeldt, B.; Stemmermann, P.
2022. Minerals, 12 (9), 1142. doi:10.3390/min12091142

Starve to Sustain - An Ancient Syrian Landrace of Sorghum as Tool for Phosphorous Bio-Economy?
Kanbar, A.; Mirzai, M.; Abuslima, E.; Flubacher, N.; Eghbalian, R.; Garbev, K.; Bergfeldt, B.; Ullrich, A.; Leibold, H.; Eiche, E.; Müller, M.; Mokry, M.; Stapf, D.; Nick, P.
2021. International Journal of Molecular Sciences, 22 (17), Art.-Nr.: 9312. doi:10.3390/ijms22179312

In situ x-ray diffraction at high temperatures: Formation of CaSiO and ternesite in recycled autoclaved aerated concrete
Ullrich, A.; Garbev, K.; Bergfeldt, B.
2021. Minerals, 11 (8), Art.Nr. 789. doi:10.3390/min11080789