Journal ArticleDOI
A neutron diffraction study of ice and water within a hardened cement paste during freeze–thaw
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TLDR
In this paper, a 1-month-old, saturated rod of hardened Portland cement paste with w/c=0.40 was studied undergoing two freeze-thaw cycles over the range 227-297 K, using neutron diffraction, at slow rates of heating and cooling.About:
This article is published in Cement and Concrete Research.The article was published on 2001-12-01. It has received 33 citations till now. The article focuses on the topics: Neutron diffraction & Portland cement.read more
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The physics of premelted ice and its geophysical consequences
TL;DR: The physics of the premelting of ice and its relationship with the behavior of other materials more familiar to the condensed-matter community are described in this paper, where a number of the many tendrils of the basic phenomena as they play out on land, in the oceans, and throughout the atmosphere and biosphere are developed.
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Curvature-dependent metastability of the solid phase and the freezing-melting hysteresis in pores.
Oleg V. Petrov,István Furó +1 more
TL;DR: This work recapitulate and generalize the concept of the freezing-melting hysteresis that attributes this phenomenon to a free-energy barrier between metastable and stable states of pore-filling material and suggests a simple method for analyzing the pore morphology from the observed phase transition temperatures.
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Formation of ice lenses and frost heave
TL;DR: In this article, the authors examine the morphology of ice growth in porous media and account for the net effect of microscopic interactions in a homogenized model formulated in terms of fundamental physical properties and characteristics of the porous medium that can be measured; no ad hoc parameterizations are required.
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A review on freeze-thaw action and weathering of rocks
TL;DR: In this article, a series of laboratory and in-situ field tests are presented to illustrate the present-day methods to assess freeze-thaw weathering, which led to insights and the development of theories on damage mechanisms.
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Gas hydrate growth and dissociation in narrow pore networks: capillary inhibition and hysteresis phenomena
TL;DR: In this paper, the authors present experimental methane hydrate growth and dissociation conditions for synthetic mesoporous silicas over a range of pressure-temperature (PT) conditions and pore size distributions, and demonstrate that hydrate formation and decomposition in narrow pore networks is characterized by a distinct hysteresis: solid growth occurs at significantly lower temperatures (or higher pressures) than dissociation.
References
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Phase separation in confined systems
TL;DR: A review of the current state of knowledge of phase separation and phase equilibria in porous materials can be found in this article, where the focus is on fundamental studies of simple fluids and well-characterized materials.
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Crystallization in pores
TL;DR: In this paper, the authors discuss the thermodynamics of crystallization within porous materials and the factors that influence stress development and cracking, including the pore size, the energy of the interface between pore wall and the crystal, and the yield stress or buckling strength of the crystal.
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A new method for the simultaneous determination of the size and shape of pores: the thermoporometry
TL;DR: In this paper, a thermodynamic study of the liquid-solid phase transformations in porous materials provides the relationships between the size of the pores in which solidification takes place and the temperature of the triple point of the divided liquid, on the one hand, and between this temperature and the apparent solidification energy on the other hand.
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Defect and Microstructure Analysis by Diffraction
TL;DR: In this paper, the authors describe a line profile analysis of a powder diffraction line profile that is influenced by straining, small size, and stacking faults in the line profile, and their correction by simple empirical functions accounting for size and microstrain.