Journal ArticleDOI
Hydration mechanisms of ternary Portland cements containing limestone powder and fly ash
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TLDR
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.About:
This article is published in Cement and Concrete Research.The article was published on 2011-03-01. It has received 849 citations till now. The article focuses on the topics: Fly ash & Ettringite.read more
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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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Cement substitution by a combination of metakaolin and limestone
TL;DR: In this paper, the coupled substitution of metakaolin and limestone in Portland cement (PC) was investigated and the mechanical properties were studied in mortars and the microstructural development in pastes by X-ray diffraction, thermogravimetry analysis, mercury intrusion porosimetry and isothermal calorimetry.
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Recent advances in understanding the role of supplementary cementitious materials in concrete
TL;DR: A review of the advances in knowledge provided by research in these areas can be found in this paper, emphasizing the impact of the research on the field and emphasizing the benefits of these advances.
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Cemdata18: A chemical thermodynamic database for hydrated Portland cements and alkali-activated materials
Barbara Lothenbach,Dmitrii A. Kulik,Thomas Matschei,Magdalena Balonis,Luis G. Baquerizo,Belay Zeleke Dilnesa,George D. Miron,Rupert J. Myers +7 more
TL;DR: The Cemdata18 database as mentioned in this paper contains thermodynamic data for common cement hydrates such as C-S-H, AFm and AFt phases, hydrogarnet, hydrotalcite, zeolites, and M-S -H that are valid over temperatures ranging from 0 to at least 100°C.
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Hydration of Portland cement with high replacement by siliceous fly ash
Florian Deschner,Frank Winnefeld,Barbara Lothenbach,Sebastian Seufert,Peter Schwesig,S. Dittrich,Friedlinde Goetz-Neunhoeffer,Jürgen Neubauer +7 more
TL;DR: In this article, the effects of fly ash on the hydration of ordinary Portland cement pastes were investigated over a hydration time of 550 days and the results were compared with a reference blend of OPC containing 50% of inert quartz powder allowing the distinction between "filler effect" and pozzolanic reaction.
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Journal ArticleDOI
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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Thermodynamic Modelling of the Effect of Temperature on the Hydration and Porosity of Portland Cement
TL;DR: 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.
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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.
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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.