Micro-Raman spectroscopy applied to depth profiles of carbonates formed in lime mortar

Martínez-Ramírez, S.; Sánchez-Cortés, Santiago; Garcia-Ramos, J.V.; Domingo, C.; Fortes, C; Blanco-Varela, María Teresa

doi:10.1016/s0008-8846(03)00227-8

Cited by 140 publications

(92 citation statements)

References 9 publications

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“…In contrast, under the fingerprint characterisation capacity of Raman spectroscopy [10,11], the reaction products of various deterioration mechanisms, such as calcium carbonate polymorphs (e.g., calcite, vaterite and aragonite) [12][13][14][15][16][17][18][19] from carbonation and sulphatebearing products (i.e., gypsum, ettringite and thaumasite) [20][21][22][23] from sulphate attack , can be clearly differentiated by their unique vibration bands (wavenumber in cm -1 ) and this can effectively overcome the limitations of ES. Moreover, as Raman spectroscopy works on the principle of intrinsic vibration of molecules, the chemical dyes as employed in the FOS is no longer needed which can totally eliminate the long-term instability and irreversibility issues facing FOS.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of carbonated Portland cement paste with optical fibre excitation Raman spectroscopy

Yue

Wang

Basheer

et al. 2017

Construction and Building Materials

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This study demonstrates the potential of developing a future Raman spectroscopy-based sensor system for monitoring carbonation of concrete structures. A tailored optical fibre Raman system was developed under the classical 45 degree geometry with a specific optical fibre assembly acting as the laser excitation-path. This system was then employed to characterise the calcium carbonate polymorphs, i.e. calcite and/or aragonite

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Section: Introductionmentioning

confidence: 99%

Characterisation of carbonated Portland cement paste with optical fibre excitation Raman spectroscopy

Yue

Wang

Basheer

et al. 2017

Construction and Building Materials

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“…Bensted was the pioneer in using Raman spectroscopy (1976a) to characterize cement minerals, following by Conjeaud and Boyer (1980). Most of the papers devoted to the application of Raman spectroscopy in cement chemistry concerns the characterization of clinker anhydrous minerals (Bensted, 1976a-Conjeaud and Boyer, 1980-Newman et al, 2005, identification of the various calcium sulfate forms: gypsum CaSO 4 ·2H 2 O, bassanite CaSO 4 ·½H 2 O and anhydrite CaSO 4 (Bensted, 1976b-Prasad, 2001), study of cement hydration by recording the decrease in intensity of the signals from the anhydrous silicate phases (Tarrida et al, 1995) and the effects of carbonation (Bensted, 1977-Martinez-Ramirez, 2003. However some studies report the use of Raman spectroscopy to investigate cementitious hydrates: namely to distinguish thaumasite Ca 6 Si 2 (OH) 12 ·(CO 3 ) 2 ·(SO 4 ) 2 ·24H 2 O from ettringite Ca 6 Al 2 (OH) 12 ·(SO 4 ) 3 ·26H 2 O, (Brough and Atkinson, 2001-Jallad et al, 2001-Sahu et al, 2002 and to characterize the C-S-H, calcium silicate hydrate, phase (Kirkpatrick et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

A Raman Study of the Sulfated Cement Hydrates: Ettringite and Monosulfoaluminate

Renaudin

Segni

Mentel

et al. 2007

ACT

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Ettringite (the AFt Ca 6 Al 2 (OH) 12 ·(SO 4 ) 3 ·26H 2 O compound) and monosulfoaluminate (the AFm Ca 4 Al 2 (OH) 12 ·SO 4 ·6H 2 O compound) phases were synthesised by the coprecipitation method and studied by micro-Raman spectroscopy. Hydrogen bond network, involving sulfate anions, ensures the cohesion of the structure of these two compounds; the columnar struture of ettringite as well as the lamellar structure of monosulfoaluminate. Raman spectroscopy has been used as a probe to investigate mainly the inter-columnar and the inter-lamellar regions of the structures. Raman spectra allowed the characterization of the local environment of sulfate anions and the hydrogen bond networks. A significant asset brought by Raman spectroscopy is the ability to work on hydrated cement products without specific sample preparation; i.e. without a risk to dammage these hydrated compounds. Several examples of the possibilities brought by Raman spectroscopy in cement chemistry are given in this paper. A space group redetermination of the ettringite structure was performed on the basis of the point symmetry of sulfate tetrahedra. The inter-columnar region of ettringite was compared to the inter-lamellar region of monosulfoaluminate as these two structural parts contain the same species. The thermal behaviors at the beginning of the dehydration (up to 390 K) and the iron substitution in ettringite were also investigated.

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“…Martinez-Ramirez et al 18 the calcite, aragonite and vaterite mix generates a wide band that would combine the three chief vibration bands corresponding to carbonate groups in different environments, at 1076, 1085 and 1090 cm 1 .…”

Section: Resultsmentioning

confidence: 99%

Micro‐Raman spectroscopy in white portland cement hydration: long‐term study at room temperature

Martínez-Ramírez¹,

Frías²,

Domingo³

2005

J Raman Spectroscopy

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The long-term hydration of white portland cement has been followed through micro-Raman spectroscopy, choosing for excitation the most adequate laser wavelength as deduced from a critical analysis of the previously reported Raman data. The bands of the corresponding spectra were attributed to the various anhydrous and hydrated phases, with full hydration of the anhydrous phases taking place after 180 days. Sulphoaluminates were seen to form in two different local environments, at 3 and 180 days respectively. Carbonates, as a secondary reaction product, were found in three different local environments.

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Micro-Raman spectroscopy applied to depth profiles of carbonates formed in lime mortar

Cited by 140 publications

References 9 publications

Characterisation of carbonated Portland cement paste with optical fibre excitation Raman spectroscopy

Characterisation of carbonated Portland cement paste with optical fibre excitation Raman spectroscopy

A Raman Study of the Sulfated Cement Hydrates: Ettringite and Monosulfoaluminate

Micro‐Raman spectroscopy in white portland cement hydration: long‐term study at room temperature

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