Characterizing CO2 in Cementitious Materials with QXRD and TGA and Remote Fiber Optic Raman Probe

The urgent need for producing sustainable cementitious materials has led to increased interest in using carbon-negative technology to enhance sustainability. In this regard, measuring the amount of CO2 is one essential issue. This study evaluated the potentials and the limitation of Thermal Gravimetric Analysis (TGA), Quantitative X-ray Diffraction (QXRD), and Optic Raman Probe in characterizing the CO2 in cementitious material with different dosages. traditional methods like TGA are accurate for measuring CO2 but need destructive or extensive sample preparation. This study proposes using a remote fiber optic Raman spectroscopy probe for non-destructive, in situ CO2 analysis in cementitious materials. Raman spectroscopy offers detailed molecular and structural information, enabling direct observation of CO2 uptake in the cement matrix under various conditions.