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

Martínez-Ramírez, S.; Frías, Moisés; Domingo, Concepción

doi:10.1002/jrs.1428

Cited by 74 publications

(50 citation statements)

References 12 publications

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“…However, Schneider et al [22] attributed this same peak to the presence of C 3 AH 6 in cement pastes containing activated slag. Martínez-Ramírez et al [17], analyzing white cement hydration with Raman spectroscopy, observed the formation of sulphate-containing phases that they were unable to identify. Klimesch and Ray…”

Section: Results and Discusionmentioning

confidence: 99%

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The effect of curing temperature on white cement hydration

Martínez-Ramírez

Frías

2009

Construction and Building Materials

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Cement manufacture has undergone extensive change in its attempts to rise to the successive challenges posed by society. The hydration of Portland cement is a complex phenomenon that depends on both reagent characteristics and reaction conditions. It is a well-known fact that the curing temperature plays an important role on the hydration kinetics.The present study is the first to be undertaken on the effect of curing temperature on white Portland cement paste hydration over long hydration times (365 days at 20ºC and 124 days at 60 ºC). The technique used, 29 Si and 27 Al NMR spectroscopy, is particularly well adapted to the study of cement hydration. White cement hydration generates a C-S-H gel in which the aluminium taken up forms bridge bonds.After nine days at 60 ºC, the degree of reaction expressed in terms of the Al(IV)/Al(VI) ratio nearly doubles the value found after 90 days at 20 ºC.

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Section: Results and Discusionmentioning

confidence: 99%

“…In a previous paper, Martínez-Ramírez et al [17] described a comprehensive micro-Raman study on white cement hydration cured at 20 ºC for 360 days.…”

Section: Introductionmentioning

confidence: 99%

The effect of curing temperature on white cement hydration

Martínez-Ramírez

Frías

2009

Construction and Building Materials

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“…The trend of the doublet centered near 860 cm −1 confirmed that alite hydrated more rapidly than belite, according to the literature. [20,24,25] With regard to the spectra recorded on the upper surface of the cements (Fig. 2(A); spectra b and d), it is interesting to note that only the surface of the wTC-TCP sample showed a band at 965 cm −1 , attributable to the ν 1 PO 4 3− mode of apatites.…”

Section: Ageing In Dpbsmentioning

confidence: 99%

“…2(A); spectra b and d), a prominent ν 1 CO 3 2− band was observed at 1088 cm −1 , with a shoulder at about 1075 cm −1 ; this spectral profile (FWHM of 14 cm −1 ) indicated the presence of carbonate ions in different local environments, as previously observed by other authors. [24] The band at 1088 cm −1 can be attributed to calcite and/or aragonite, whereas a component at about 1075 cm −1 has been reported for vaterite. [22] In the spectra recorded in the inner fractured sides (Fig.…”

Section: Ageing In Dpbsmentioning

confidence: 99%

Ageing of calcium silicate cements for endodontic use in simulated body fluids: a micro‐Raman study

Taddei

Tinti

Gandolfi

et al. 2009

J Raman Spectroscopy

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To evaluate bioactivity properties, a calcium silicate experimental cement (wTC) and a phosphate-doped wTC cement (wTC-TCP) were aged for different times (1-180 days) at 37 • C in two simulated body fluids, i.e. Dulbecco's phosphate buffered saline (DPBS) and Hank's balanced salt solution (HBSS). The cements were analyzed by micro-Raman spectroscopy to investigate the presence of calcium phosphate deposits and the composition changes as a function of the storage time (hydration of anhydrite/gypsum and formation of ettringite; hydration of belite/alite and formation of hydrated silicates). After 1 day of ageing in DPBS, the two cements already showed a different behavior: only the surface of wTC-TCP cement showed the band at 965 cm −1 , suggesting the formation of a detectably thick calcium phosphate deposit. The trend of the I 965 /I 990 Raman intensity ratio indicated the formation of a meanly thicker apatite deposit on the wTC-TCP cement until 90 days. After 60 days of ageing in DPBS, the thickness of the apatite deposit on wTC and wTC-TCP was about 200 and 500 µm, respectively, whereas at 180 days, the two cements did not appear significantly different (thickness of about 900 µm). The bioactivity of both cements in HBSS was less pronounced than in DPBS, according to the lower phosphate concentration of HBSS; at the same time, higher amounts of calcite were found on the surface of both cements. The wTC-TCP cement showed a higher bioactivity in this medium also; after 180 days, the thickness of the apatite deposit on wTC and wTC-TCP was <50 µm and about 100 µm, respectively.

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“…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). The last two years there has been an increasing interest in applying Raman analyses on wet hydrating samples as mentioned by Skibsted and Hall (2007) and indicating by the numerous recent literature: hydration/carbonation of aluminate phases (Black et al, 2006a and2006b), silicate phases (Ibanez et al, 2007), portlandite (El-Turki et al, 2007) and cement (Martinez-Ramirez et al, 2006-Gastaldi et al, 2007, structural features of C-S-H , corrosion (Poupard et al, 2006) and sulfate-attack (Ma et al, 2006) of concrete. The aim of our study was to use the well known sulfated hydrated cementitious materials (ettringite and monosulfoaluminate Ca 4 Al 2 (OH) 12 ·SO 4 ·6H 2 O) to explore the possibilities given by Raman spectroscopy.…”

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

Cited by 74 publications

References 12 publications

The effect of curing temperature on white cement hydration

The effect of curing temperature on white cement hydration

Ageing of calcium silicate cements for endodontic use in simulated body fluids: a micro‐Raman study

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

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