Fundamental Study on Methods for Carbon Origin Analysis in Hardened Cement Paste Mixtures
By K. Yano, Y. Yoda, R. Kitagaki and S. Itoh
Concrete Journal, Vol.63, No.8, Aug. 2025
- Synopsis
- As a technology for removing carbon dioxide (CO2) released into the atmosphere, efforts to absorb and fix atmospheric CO2 in concrete, as well as to store wood-derived biomass that have absorbed atmospheric CO2 in concrete, are gaining attention. Quantitative evaluation of this carbon fixation can lead to the calculation of carbon removal amounts, leading to the creation of financial outcome. However, when natural limestone or petroleum-derived carbon materials are included as aggregates or chemical admixtures in the samples, an analytical method is needed to distinguish between atmospheric and other sources of CO2. This paper conducted fundamental studies on carbon origin analysis methods using radiocarbon for hardened cement paste mixtures containing multiple carbon species, and verified the quantitative evaluation of carbon contents derived from atmospheric CO2.
- Keywords:
- Hardened cement pastes, Atmospheric CO2 absorption, Calcium carbonate, Carbon origin analysis, Radiocarbon
