Wang et al. (2023): Verification Method of Direct Air Capture by Cementitious Material Using Carbon Isotopes
Zhenzhen Wang, Abudushalamu Aili, Masayo Minami, Ippei Maruyama IN: Journal of Advanced Concrete Technology, 21, 11, https://doi.org/10.3151/jact.21.934
This study proposes an experimental method to track the origin of cement paste that fixes CO2 directly from the air under natural conditions. By exposing powders of well-hydrated cement paste to air, carbonated cement paste powders are obtained with different carbonation degrees. The inorganic carbon of these carbonated samples is extracted by dissolution in phosphoric acid, and the isotopic characteristics related to 13C and 14C are measured.