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In-situ monitoring of early hydration of clinker and Portland cement with optical fiber excitation Raman spectroscopy
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| 【文章作者】Yue, Yanfei;Wang, Jing Jing;Basheer, P. A. Muhammed;Bai, Yun |
| 【文章摘要】 This paper explores the potential of using optical fiber Raman spectroscopy for continuously monitoring the early hydration of cement thanks to its superb capacities for characterizing wet samples and poorly-structured calcium-silicate-hydrate (C-S-H) as well as its excellent remote sensing competence. A bespoke optical fiber excitation Raman spectrometer with a 632.8 nm laser wavelength under an "optical fiber excitation + spectrometer objective collection" configuration was established and applied. The ongoing hydration of a clinker and a Portland cement (PC) was then monitored during their first 8 h of hydration. The main hydration products, in particular, C-S-H and ettringite & monosulfate (AFt & AFm), have been successfully identified and continuously monitored in situ. The findings from the optical fiber Raman were well supported by bench-mounted Raman, X-ray Diffraction (XRD) and Isothermal Conduction Calorimetry (ICC) tests. The results presented in this paper show a great potential of optical fiber Raman spectroscopy for future civil engineering applications. |
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【卷】112【ISSUE】【ISSUEID】815C0071
【文章期份】2020
【发布日期】2021/3/3 11:16:58
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