Hydrothermal and thermal activation of synthetic forsterite, Mg2SiO4 – Basic study on the path to CO2-neutral Mg-binders
Rafalski F, Bellmann F, Neubauer J, Götz-Neunhoeffer F (2026)
Publication Language: English
Publication Type: Journal article, Original article
Publication year: 2026
Journal
Book Volume: 206
Article Number: 108263
DOI: 10.1016/j.cemconres.2026.108263
Open Access Link: https://doi.org/10.1016/j.cemconres.2026.108263
Abstract
The hydrothermal reaction via autoclave treatment of pure synthetic forsterite was studied at different KOH concentrations, reaction times and specific surface areas of forsterite powder. The degree of reaction increased with raised KOH concentration, surface area and progressing duration. Additionally, interrupting the treatment and stirring the material several times showed a positive impact on the reaction. Autoclaved forsterite was thermally activated via annealing at different temperatures in a range between 600 ◦C and 850 ◦C. This led to thermal decomposition of hydrothermally formed hydrate phases and to formation of a partially dehydrated amorphous magnesium silicate phase. At 800–850 ◦C, significant quantities of forsterite and minor amounts of enstatite crystallized from this amorphous fraction. Amorphous magnesium silicate, predominant at 600–750 ◦C, is hydraulic reactive, as demonstrated by isothermal calorimetry. The hydration of activated forsterite revealed a maximum after ca. 7 h and was almost completed after 48 h.
Authors with CRIS profile
Florian Rafalski
Lehrstuhl für Mineralogie
Jürgen Neubauer
Lehrstuhl für Mineralogie
Friedlinde Götz-Neunhoeffer
Lehrstuhl für Mineralogie
Involved external institutions
Germany (DE)How to cite
APA:
Rafalski, F., Bellmann, F., Neubauer, J., & Götz-Neunhoeffer, F. (2026). Hydrothermal and thermal activation of synthetic forsterite, Mg2SiO4 – Basic study on the path to CO2-neutral Mg-binders. Cement and Concrete Research, 206. https://doi.org/10.1016/j.cemconres.2026.108263
MLA:
Rafalski, Florian, et al. "Hydrothermal and thermal activation of synthetic forsterite, Mg2SiO4 – Basic study on the path to CO2-neutral Mg-binders." Cement and Concrete Research 206 (2026).
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