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

TY - JOUR

T1 - In-situ monitoring of early hydration of clinker and Portland cement with optical fiber excitation Raman spectroscopy

AU - Yue, Yanfei

AU - Wang, Jing Jing

AU - Basheer, P.A. Muhammed

AU - Bai, Yun

N1 - © 2020 Elsevier Ltd. All rights reserved.

PY - 2020/9

Y1 - 2020/9

N2 - 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.

AB - 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.

KW - Bench-mounted Raman spectroscopy

KW - Cement

KW - Clinker

KW - Hydration

KW - Optical fiber excitation Raman spectroscopy

U2 - 10.1016/j.cemconcomp.2020.103664

DO - 10.1016/j.cemconcomp.2020.103664

M3 - Article

SN - 0958-9465

VL - 112

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

M1 - 103664

ER -