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Showing 1 to 20 of 22 for “"mercury intrusion porosimetry"”.
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Development of analytical model relating compressive strength in porous ceramics to mercury intrusion porosimetry-derived microstructural parameters
The Ryshkewitch equation, $\sigma$ = $\sigma\sp\circ$ exp($-\beta$P), has been a classical formula representing the strength of porous ceramic materials. Here $\beta$ is an empirical constant. Hence this equation lacks the capability of relating microstructure to actual strengths, especially with …
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Porosity control of alkali-activated aluminosilicates via functional alkoxysilane additives
… of these complex systems using gas adsorption porosimetry and mercury intrusion porosimetry (MIP) were addressed. A new pore size distribution calculation using MIP results was tested and applied. Geopolymer mesoporosity could be minimized through the use of alkoxysilanes with acrylic acid or …
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Towards reliable correlation of microporous layer physical characteristics and PEMFC electrochemical performance
… and thickness of MPLs were characterized by mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM) and X-ray micro computed tomography (μCT).
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Brittle-viscous deformation cycles at the base of the seismogenic zone in the continental crust
… of x-ray micro-computed tomography (µCT), mercury intrusion porosimetry, He pycnometry, and microstructural analysis. Low porosity values (0.8-4.4%) for different rock type, 2-20 µm pore size, representative of pore connectivity, and microstructural observation suggest a relationship to a …
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Fabrication and characterization of hollow silica aerogel spheres using sol-gel processing in the dual nozzle generation system
… of the silica spheres was performed using MIP (Mercury Intrusion Porosimetry), BET, optical microscopy, interferometry, and SEM (Scanning Electron Microscopy). TGA (Thermogravimetric Analysis) and DTA (Differential Thermal Analysis) were used, along with the measurement of weight loss and linear …
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Characterization of natural porous media by NMR and MRI techniques : high and low magnetic field studies for estimation of hydraulic properties
… with classical soil physics method like mercury intrusion porosimetry; water retention curves (pF) and multi-step-outflow (MSO) were performed for the characterization of the hydraulic properties of the materials. Due to the extensive research the experiments have been structured in three …
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Crack Self-Healing in Alkali-Activated Materials: From Mechanisms to Strategies for Enhancing the Healing Efficiency
… compressive and tensile tests, sorptivity tests, mercury intrusion porosimetry (MIP), inductively coupled plasma optical emission spectroscopy (ICP-OES), and X-ray microcomputed tomography (μCT). Crack self-healing products were characterized using scanning electron microscopy with energy …
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Circular dry cement inclusions: a novel approach to stabilising clay soil
… The porosity of the cement was determined using Mercury Intrusion Porosimetry (MIP) and Nitrogen Adsorption. To further investigate the ability of cement inclusions to absorb pore water, capillary sorption tests were performed over a range of curing times up to 28 days. All tests were performed …
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Factors influencing the strength development in pfa-lime systems
… of microstructure during curing. In addition mercury intrusion porosimetry (MIP) has been used to determine the corresponding changes in pore size distribution.<br/><br/>When moistened with water the pfa was found to contain 1.34% of gypsum. In the dry pfa this gypsum is present on the pfa …
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Effects of Thermomechanical Refining on Douglas fir Wood
… density, more so at the highest energy. Thermoporosimetry showed increases in sub-micron scale porosity, greatest at the highest energy. Mercury intrusion porosimetry (MIP) revealed porosity changes on a higher dimensional scale. Brunauer-Emmett-Teller gas adsorption and MIP showed that …
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Applications of unilateral NMR in nondestructive testing
… those of the pore size distributions obtained by mercury intrusion porosimetry unless the samples exhibit very strong ferromagnetic contaminations (historical brick samples). (c) Degradation of historical papers: In the present work historical books from the 17th century were subjected to the …
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The microstructure of synthetic aggregate produced from waste materials and its influence on the properties of concrete
… produced using different firing conditions. Mercury intrusion porosimetry (MIP) and quantitative image analysis of backscattered electron (BSE) were employed to assess the pore structure of the synthetic aggregate. The main variables considered were the firing temperature and the duration at …
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Engineering properties of sulphate-bearing clay soils stabilised with lime-activated ground granulated blast furnace slag (GCBS)
… influence of shrinkage during drying prior to mercury intrusion porosimetry in the dimensionally semi-stable soil system.<br/><br/>The volume stability of stabilised specimens during frost action was assessed in a series of 12 freeze-thaw cycles, which were carried out in accordance to the …
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La influencia de las cenizas volantes como sustituto parcial del cemento Pórtland en la durabilidad del hormigón
… (thermo‐gravimetric and thermodifferential) and mercury intrusion porosimetry. The results show that the incorporation of fly ash as a partial substitute of Portland cement can improve the concrete properties. But, its behavior varies depending on the physical and chemical properties of cements, …
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Gas phase heterogeneous catalyst performance testing in laboratory fixed-bed reactors
… pore size distributions (N2 physisorption and mercury intrusion porosimetry (MIP)), particle size distributions (by photo- and microscopic analysis), bulk and particle densities and product gas compositions (by gas chromatography) to enable evaluation of the various criteria employed. …
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Influencia de la compactación y conservación de probetas durante su permanencia en obra, así como su posterior refrentado en la resistencia a compresión del hormigón (período 1997-2007)
… de agua bajo presion, porosimetria por intrusion de mercurio, isotermas de absorcion-desorcion de gases por el metodo Bet, microscopia electronica de barrido, analisis por energias dispersivas, back scattering, analisis termico diferencial y analisis termogravimetrico. En la realizacion …
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Properties of Western Cape concrete with metakaolin
… tensile splitting strength, and porosity using Mercury Intrusion Porosimetry (MIP), v) deformation behaviour of concrete using static elastic modulus, and creep and shrinkage tests, and finally, vi) durability properties of concretes assessed by Durability Index (DI) tests, accelerated mortar …
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Influencia de las condiciones de curado en el comportamiento del hormigón sometido a ciclos hielo-deshielo
… penetration under pressure, gas permeability, mercury intrusion porosimetry, the differential thermal analysis (ATD), termogravimetric analysis (TG), and chloride diffusion test. Mechanical tests were also performed before and after the cycles. From the obtained results, it can be concluded …
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Dosificación, propiedades y durabilidad en hormigón autocompactante para edificación
… the hydration process are evaluated by means of mercury intrusion porosimetry tests and differential thermal analysis and gravimetric tests. The mechanical properties, that is to say, compressive strength and flexural tensile strength, of the mortars made with the special cements were analysed. …
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Influencia de la composición de distintos hormigones en los mecanismos de transporte de iones agresivos procedentes de medios marinos
… analysis (DTA), X - ray diffraction (XRD), mercury intrusion porosimetry (MIP), gas permeability, chloride, sulfate and magnesium diffusion and mechanical properties of concrete. The experimental procedure presented gives reliable information to evaluate the homogeneity of different …
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