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In-situ monitoring of early hydration of clinker and Portland cement with optical fiber excitation Raman spectroscopy

Yue, Y; Wang, JJ; Basheer, PAM; Bai, Y; (2020) In-situ monitoring of early hydration of clinker and Portland cement with optical fiber excitation Raman spectroscopy. Cement and Concrete Composites , 112 , Article 103664. 10.1016/j.cemconcomp.2020.103664. Green open access

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Abstract

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.

Type: Article
Title: In-situ monitoring of early hydration of clinker and Portland cement with optical fiber excitation Raman spectroscopy
Open access status: An open access version is available from UCL Discovery
DOI: 10.1016/j.cemconcomp.2020.103664
Publisher version: http://dx.doi.org/10.1016/j.cemconcomp.2020.103664
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
Keywords: Bench-mounted Raman spectroscopy, Cement, Clinker, Hydration, Optical fiber excitation Raman spectroscopy
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Civil, Environ and Geomatic Eng
URI: https://discovery-pp.ucl.ac.uk/id/eprint/10105783
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