A comparative study of the ferritephase in high-iron cements with the pure C2AxF1−X by Mössbauer spectroscopy

Yanwei, Zeng; Yang, Ning

doi:10.1016/0008-8846(91)90028-g

Cited by 7 publications

(2 citation statements)

References 4 publications

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“…The Mössbauer parameters: quadrupole splitting (˜EQ), isomer shift (ä) and line width values given in Table 6, showed iron in +3 states with an octahedral and tetrahedral environment in the C 4 AF phase of OPC. Results already published support the present observation (Tamas and Vertes, 1973;Yanwei and Nanru, 1991). The Mössbauer parameters of OPC hydrated for 1 day shows a combination of two doublets.…”

Section: Differential Scanning Calorimetric Studiessupporting

confidence: 93%

Cement hydration in the presence of black gram pulse

Singh¹,

Das²,

Dwivedi³

2010

Advances in Cement Research

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Naturally occurring black gram pulse (BGP) in the form of fine powder was used as an admixture during the hydration of ordinary Portland cement (OPC). The hydration characteristics of OPC in the presence of different concentrations of BGP were studied with the help of calorimetric, differential scanning calorimetric, powder Xray diffraction, UV-visible, Fourier transform-infrared and Mössbauer spectroscopic techniques. The results suggested that BGP is adsorbed on the surface of cement/hydration products and a weak interaction occurs between them. Due to this interaction, BGP retards the hydration process of the cement. Mössbauer studies suggest that the addition of BGP in OPC increases the asymmetry of the electronic environment around Fe 3þ ions and leads to the formation of nano-sized hydration products.

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Section: Differential Scanning Calorimetric Studiessupporting

confidence: 93%

Cement hydration in the presence of black gram pulse

Singh¹,

Das²,

Dwivedi³

2010

Advances in Cement Research

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“…In both KMO1 and KMO2, the maximum amount of Si was incorporated into the ferrite phase at 1250 °C (Figure 4e-f). However, it has already been reported that Si and S commonly replace Fe or Al in a ferrite structure [41]. In both clinkers, the amount of Ti incorporated into the ferrite phase increased when raising the sintering temperature (Figure 4e,f).…”

Section: Sem/edsmentioning

confidence: 68%

The Incorporation of Steel Slag into Belite-Sulfoaluminate Cement Clinkers

et al. 2021

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The potential use of steel slag from treated steel slag in belite-sulfoaluminate cements was investigated in this study. Cement clinkers with two phase compositions were synthesized, allowing the incorporation of different amounts of steel slag. The phase composition and microstructure of cement clinkers at three different sintering temperatures were studied by X-ray powder diffraction and the Rietveld method, as well as scanning electron microscopy with energy dispersive spectrometry. The results showed that the targeted phase composition of clinkers was achieved at a sintering temperature of 1250 °C. However, a higher amount of perovskite instead of ferrite was detected in the clinker with a higher content of Ti-bearing bauxite. Apart from the main phases, such as belite, calcium sulfoaluminate, and ferrite, several minor phases were identified, including mayenite, perovskite, periclase, and alkali sulfates. In both clinker mixtures, a higher content of MgO in the steel slags resulted in the formation of periclase. Furthermore, the hydration kinetics and compressive strength at 7 and 28 days were studied in two cements prepared from clinkers sintered at 1250 °C. As evidenced by the results of isothermal calorimetry, the hydration kinetics were also influenced by the minor clinker phases. Cement with a higher content of calcium sulfoaluminate phase developed a higher compressive strength.

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Development of non-Portland cements

Singh¹

2023

The Science and Technology of Cement and Other Hydraulic Binders

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A comparative study of the ferritephase in high-iron cements with the pure C2AxF1−X by Mössbauer spectroscopy

Cited by 7 publications

References 4 publications

Cement hydration in the presence of black gram pulse

Cement hydration in the presence of black gram pulse

The Incorporation of Steel Slag into Belite-Sulfoaluminate Cement Clinkers

Development of non-Portland cements

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