Effect of synthesis temperature and cooling conditions of beta-dicalcium silicate on its hydration rate

Fierens, Paul; Tirlocq, J.

doi:10.1016/0008-8846(83)90126-6

Cited by 18 publications

(9 citation statements)

References 5 publications

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“…For the sake of simplicity, the observations are summarized as follows: the higher the amount of defects or the higher the energy of the defects, the shorter the dormant period and the higher the maximum hydration rate. Similar tendencies have been seen for C 2 S, but the influence of defects on hydration is significantly lower for C 2 S than for C 3 S …”

Section: Etch Pit Formation During the Dissolution Of Alitesupporting

confidence: 81%

Analytical Model for the Alite (C₃S) Dissolution Topography

Nicoleau¹,

Bertolim²

2015

J. Am. Ceram. Soc.

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The surface topography that develops during the dissolution of alite (or C 3 S) has never been considered as an important aspect of the hydration of portland cement. Like many other minerals, alite dissolution results in the formation of etch pits. In this study, a simple model with a handful of parameters is proposed to explore the kinetic consequences of pitting on the dissolution of alite. The first consequence is an accelerating period during which the reactive surface, that is, the pit, expands. This new feature, to the authors' opinion never reported previously for alite, is supported by experimental data. The mechanisms leading to the activation of the initial dissolution centers and to the growth of pits could be hindered by some inhibitory species such as aluminum ions or organic molecules. The model indicates that only a few assumptions about the formation of pits in the presence of these species are necessary to introduce an initial period of low dissolution prior to the accelerating phase. Such a low early reactivity is similar to the so-called dormant period observed during portland cement hydration. The implications of this new model in cement hydration could go beyond this article and shed light on still unresolved fundamental questions on hydration behavior.

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Section: Etch Pit Formation During the Dissolution Of Alitesupporting

confidence: 81%

Analytical Model for the Alite (C₃S) Dissolution Topography

Nicoleau¹,

Bertolim²

2015

J. Am. Ceram. Soc.

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“…The hydration behavior depends greatly on the powder properties as well as on the type of foreign oxides in solid solution. [1][2][3][4] On a laboratory scale, highly reactive ␤-Ca 2 SiO 4 crystals with no foreign oxides have been successfully synthesized by both a sol-gel-type method 5 and hydrothermal processing. 6 These results show that the activity is effectively increased by the high specific surface area of the powder specimens.…”

Section: Introductionmentioning

confidence: 99%

Highly Reactive Remelted Belite

Fukuda

Ito

1999

Journal of the American Ceramic Society

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Remelted belite showed higher hydration activity and better grindability than the quenched material. Both properties were closely related to the belite microtextures induced by the remelting reaction; after the reaction, the belite showed disintegration of the intracrystalline lamella structure, inclusion of the liquid exsolved on the former lamella boundaries, and crystallization of the liquid during further cooling. The fractures easily penetrated the remelted crystal grains upon grinding, probably along the disintegrated lamella boundaries and/or along the inclusions. The resulting fragments were irregular in shape with high specific surface area, leading to the high hydration activity of the remelted belite.

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“…They were then fired at 12001C for 8 h, from 12001C to 12501C for 8 h, and at 12501C for another 8 h. An intermediate grinding by hand was performed between cycles to homogenize the materials. In the second cycle, the materials were fired at 13001C for 8 h, from 13001C to 13501C for 8 h, and at 13501C for another 8 h. [15][16][17] If the fired product contained excess free lime (41 wt%, determined by X-ray diffraction), the materials were fired again at 14001C for 12 h. Finally, the resulting clinker was hand ground and passed through a #325 sieve (45 mm).…”

Section: Synthesismentioning

confidence: 99%

Incorporation of Waste Materials into Portland Cement Clinker Synthesized from Reagent‐Grade Chemicals

Chen

Juenger

2009

Int J Applied Ceramic Tech

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In this study, the feasibility of using waste materials to manufacture Portland cement was investigated. Reagent-grade chemicals were used to synthesize a Portland cement clinker with a tightly controlled composition. Then, calcium oxidebearing waste materials, specifically fly ash and blast furnace slag, were combined with the reagent-grade chemicals. The synthetic cements were characterized using X-ray diffraction, scanning electron microscopy, and isothermal calorimetry. Results show that Portland cement can be successfully synthesized by replacing reagent-grade chemicals with up to 40% fly ash and 60% slag incorporation. These synthetic cements possess early-age hydration behavior similar to a commercial Type I/II Portland cement.

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Effect of synthesis temperature and cooling conditions of beta-dicalcium silicate on its hydration rate

Cited by 18 publications

References 5 publications

Analytical Model for the Alite (C₃S) Dissolution Topography

Analytical Model for the Alite (C₃S) Dissolution Topography

Highly Reactive Remelted Belite

Incorporation of Waste Materials into Portland Cement Clinker Synthesized from Reagent‐Grade Chemicals

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Effect of synthesis temperature and cooling conditions of beta-dicalcium silicate on its hydration rate

Cited by 18 publications

References 5 publications

Analytical Model for the Alite (C3S) Dissolution Topography

Analytical Model for the Alite (C3S) Dissolution Topography

Highly Reactive Remelted Belite

Incorporation of Waste Materials into Portland Cement Clinker Synthesized from Reagent‐Grade Chemicals

Contact Info

Product

Resources

About

Analytical Model for the Alite (C₃S) Dissolution Topography

Analytical Model for the Alite (C₃S) Dissolution Topography