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
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Journal ArticleDOI
Chloride binding behaviors of metakaolin-lime hydrated blends: Influence of gypsum and atmospheric carbonation
TL;DR: In this paper, the effects of gypsum and carbonation on their chloride binding behaviors were investigated by titration, X-ray diffraction, thermogravimetry and thermodynamic analysis.
Journal ArticleDOI
Dissolution and initial hydration behavior of tricalcium aluminate in low activity sulfate solutions
Alexander S. Brand,Alexander S. Brand,Steven B. Feldman,Paul E. Stutzman,Anton V. Ievlev,Matthias Lorenz,Darren C. Pagan,Sriramya Nair,Justin M. Gorham,Jeffrey W. Bullard +9 more
TL;DR: In this article, the authors evaluated the influence of alkali or alkaline earth sulfates on the hydration of cubic tricalcium aluminate (C3A) using in situ dissolution rate measurements, by ex situ near-surface composition measurements with secondary ion mass spectrometry, and by in situ synchrotron X-ray diffraction to monitor precipitation of hydration products.
Journal ArticleDOI
Mitigating steel corrosion in reinforced concrete using functional coatings, corrosion inhibitors, and atomistic simulations
TL;DR: In this paper, the authors describe new approaches based on compositional manipulation of the cementitious binder, and its geometrical arrangement, to mitigate steel corrosion in concrete, and a new ability to study corrosion processes from a fundamental point of view.
Book ChapterDOI
Leaching of Cementitious Materials by Pure Water and Strong Acids (HCl and HNO 3 )
Josée Duchesne,Alexandra Bertron +1 more
TL;DR: In this paper, it is shown that in contact with a solution with low mineral content and/or as the pH of the solution decreases, hydrolytic decomposition of the hydrated cement compounds disturbs the equilibrium of the cement matrix, and causes severe degradation of the material, leading to a deterioration in its technical properties.
Journal ArticleDOI
Early hydration of calcium sulfoaluminate cement in the presence of hydroxyethyl methyl cellulose
TL;DR: In this article, the influence of hydroxyethyl methyl cellulose (HEMC) on the early hydration evolution of calcium sulfoaluminate (CSA) cement within 72h was studied by using isothermal calorimetry, thermal analysis (TG-DTA), X-ray diffraction analysis, and environmental scanning electron microscopy.
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.
Journal ArticleDOI
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.
Journal ArticleDOI
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.