In situ Raman analysis of hydrating C₃A and C₄AF pastes in presence and absence of sulphate

Authors: Black, L.; Breen, C.; Yarwood, J.; Phipps, J.; Maitland, G.

Source: Advances in Applied Ceramics, Volume 105, Number 4, August 2006 , pp. 209-216(8)

Publisher: Maney Publishing

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Virtual Maney - Cement and Concrete

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Abstract:

Raman spectroscopy has been used to follow the hydration of C₃A and C₄AF, two of the principal components of ordinary Portland cement (OPC), in the absence and presence of calcium sulphate (gypsum). Raman spectroscopy enabled in situ, real time analysis of the hydrating pastes. Analysis of the pastes by X-ray diffraction complemented the Raman data and confirmed sample composition. Subtle changes in the Raman spectra of the different pastes illuminated differences in hydration behaviour between C₃A and C₄AF. The similarities and differences between the various systems are discussed. The influence of carbon dioxide on the hydration products has also received attention.

Keywords: ETTRINGITE; CEMENT; RAMAN SPECTROSCOPY; HYDRATION; MONOSULPHATE

Document Type: Research Article

DOI: http://dx.doi.org/10.1179/174367606X120179

Publication date: 2006-08-01

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