Journal ArticleDOI
The AFm phase in Portland cement
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TLDR
In this article, a scheme of phase balances was proposed to calculate the mineralogical balances of a hydrated cement paste with greater accuracy than hitherto practicable, and experimentally-determined phase relationships were depicted at 25 deg. C.About:
This article is published in Cement and Concrete Research.The article was published on 2007-02-01. It has received 604 citations till now. The article focuses on the topics: AFm phase & Portlandite.read more
Citations
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Hydration mechanisms of sewage sludge ashes used as cement replacement
TL;DR: In this paper, the influence of sewage sludge ash (SSA) on the hydration of Portland cement (OPC) was investigated, and it was shown that the additional alumina released by SSA results in the formation of higher amount of AFt and AFm phases, leading to changes in the total volume of the solid and thus the properties of the systems.
Journal ArticleDOI
Effect of Eggshell Powder on the Hydration of Cement Paste.
TL;DR: The addition of eggshell powder provided nucleation sites in the hydration products and accelerated cement hydration, which helps to reduce the carbon dioxide emissions from cement factories by reducing clinker production.
Journal Article
Fly ash -limestone ternary composite cements: synergetic effect at 28 days
TL;DR: In this article, the effect of increasing the replacement levels of the ordinary Portland cement (OPC) (up to 35% replacement), and combining siliceous fly ash (FA) and limestone powder (L) to replace OPC are investigated.
Journal ArticleDOI
Feasibility of incorporating phosphogypsum in ettringite-based binder from ladle slag
Katrijn Gijbels,Hoang Nguyen,Paivo Kinnunen,Wouter Schroeyers,Yiannis Pontikes,Sonja Schreurs,Mirja Illikainen +6 more
TL;DR: In this paper, the potential use of phosphogypsum (PG) as a calcium sulfate source for the production of an ettringite-based binder (LSG) was investigated.
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Calcium Nitrite Corrosion Inhibitor in Portland Cement: Influence of Nitrite on Chloride Binding and Mineralogy
TL;DR: In this article, the binding of nitrite and chloride in cement paste occurs mainly as a consequence of reaction with the AFm phase, and the reaction has been modeled with the aid of new thermodynamic data on the stability of Nitrite-AFm and by focused experiments performed on key compositions.
References
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ReportDOI
User's guide to PHREEQC (Version 2)-a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations
David L. Parkhurst,C.A.J. Appelo +1 more
TL;DR: PHREEQC as discussed by the authors is a C program written in the C programming language that is designed to perform a wide variety of low-temperature aqueous geochemical calculations.
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The Role of Calcium Carbonate in Cement Hydration
TL;DR: In this paper, it is shown by experiment and calculation that much, if not all, of this calcite is reactive and affects the distribution of lime, alumina and sulfate and thereby alters the mineralogy of hydrated cement pastes.
Journal ArticleDOI
Thermodynamic modelling of the hydration of Portland cement
TL;DR: In this paper, a thermodynamic model is developed and applied to calculate the composition of the pore solution and the hydrate assemblage during the hydration of an OPC.
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Nagra/PSI Chemical Thermodynamic Data Base 01/01
TL;DR: The Nagra/PSI Chemical Thermodynamic Data Base has been updated to support performance assessments of the planned Swiss repositories for radioactive waste as discussed by the authors, and more than 70% of the database contents have been revised.
Journal ArticleDOI
Thermodynamic investigation of the CaOAl2O3CaSO4H2O system at 25°C and the influence of Na2O
D. Damidot,F.P. Glasser +1 more
TL;DR: In this article, the CaOAl2O3CaSO4H2O system at 25°C has been investigated by calculations on the equilibrium solubility surfaces of AH3, C3AH6, CH, C 6 A S 3 H x, C 4 A S H x and gypsum.