Thermodynamic Modelling of the Effect of Temperature on the Hydration and Porosity of Portland Cement
TLDR
In this article, the phase assemblage and pore solution of Portland cements hydrated between 0-60°C were modeled as a function of time and temperature, and a good correlation between calculated porosity and measured compressive strength was observed.About:
This article is published in Cement and Concrete Research.The article was published on 2008-01-01 and is currently open access. It has received 785 citations till now. The article focuses on the topics: Portland cement & Calcium silicate hydrate.read more
Citations
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Supplementary cementitious materials
TL;DR: The use of silica-rich SCMs influences the amount and kind of hydrates formed and thus the volume, the porosity and finally the durability of these materials.
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Influence of limestone on the hydration of Portland cements
TL;DR: In this paper, the influence of the presence of limestone on the hydration of Portland cement was investigated, and it was shown that the stabilisation of monocarbonate in the absence of limestone indirectly stabilised ettringite, leading to a corresponding increase of the total volume of the hydrate phase and a decrease of porosity.
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Hydration mechanisms of ternary Portland cements containing limestone powder and fly ash
TL;DR: In this article, the effect of minor additions of limestone powder on the properties of fly ash blended cements was investigated using isothermal calorimetry, thermogravimetry (TGA), X-ray diffraction (XRD), scanning electron microscopy (SEM) techniques, and pore solution analysis.
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Advances in understanding hydration of Portland cement
TL;DR: In this paper, the growth of C-S-H is the principal factor controlling the main heat evolution peak and after several days space becomes the major factor controlling hydration, but deceleration cannot be attributed to diffusion control.
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Influence of slag chemistry on the hydration of alkali-activated blast-furnace slag — Part I: Effect of MgO
TL;DR: In this article, the microstructure of three AASs with MgO contents between 8 and 13.5% were investigated and the formation of C(−−A)−S−H and a hydrotalcite-like phase was observed in all samples by X-ray diffraction (XRD), thermal analysis (TGA) and scanning electron microscopy (SEM) techniques.
References
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SUPCRT92: a software package for calculating the standard molal thermodynamic properties of minerals, gases, aqueous species, and reactions from 1 to 5000 bar and 0 to 1000 ° C
TL;DR: The SUPCRT92 software package as discussed by the authors is a suite of three interactive FORTRAN 77 programs, including SPRONS92.DAT, which allows the calculation of the standard Gibbs free energy, enthalpy, entropy, heat capacity, and volume of each reaction specified on the RXN file through a range of conditions specified on CON file.
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Slaty cleavage and related strain in Martinsburg Slate, Delaware Water Gap, New Jersey
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A model for the microstructure of calcium silicate hydrate in cement paste
TL;DR: In this paper, a model for the structure of calcium silicate hydrate (C-S-H) as it is formed during the hydration of Portland cement is proposed, which is a simplified representation of the microstructure within the size range of about 1 to 100 nm.
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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.