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Showing 1 to 20 of 32 for “"mercury intrusion"”.
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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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ΒΕΛΤΙΩΜΕΝΗ ΜΕΘΟΔΟΣ ΑΝΑΛΥΣΗΣ ΤΗΣ ΠΟΡΩΔΟΥΣ ΔΟΜΗΣ ΔΙΑΠΕΡΑΤΩΝ ΣΤΕΡΕΩΝ: ΕΦΑΡΜΟΓΗ ΣΕ ΕΛΛΗΝΙΚΑ ΠΕΤΡΕΛΑΙΟΦΟΡΑ ΠΕΤΡΩΜΑΤΑ
… STRUCTURE OF PERMEABLE SOLIDS IS EMBEDDED IN MERCURYINTRUSION-RETRACTION CURVES IN A HIGHLY CONVOLUTED FORM. FOR SOME IMPORTANT CLASSES OF POROUS MEDIA (E.G. SEDIMENTARY OIL-BEARING ROCKS, GRANULAR MATERIALS, CATALYSTS, ETC) THE PORE SPACE CAN BE REPRESENTED AS A MATRIX OF LARGE …
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Porosity control of alkali-activated aluminosilicates via functional alkoxysilane additives
… 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 similar …
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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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Phase separation spinning of porous polypropylene hollow fibers
… optical and scanning electron microscopes, and mercury intrusion pore size distribution measurements, it was concluded that the structure of the fibers consisted of fine networks of interconnecting voids or pores. The significant majority of these pores had diameters of less than one micron. …
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Development of a short test for the identification of aggregates causing poor concrete performance when frozen
… specimens exposed to freeze-thaw cycles, and mercury-intrusion porosimeter tests of individual aggregate particles were conducted. Several parameters have been obtained from these tests. They are: durability factors at 100 cycles, slope of curves of time vs. length change, slope of curves of …
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Investigation and computer modelling of the pore structure of paper and of consolidated pigment coatings
… of consolidated pigments were measured using mercury porosimetry. Prior to this work, mercury porosimetry was rarely used in this field due to problems associated with the conventional interpretation of mercury porosimetry data. These problems were examined and two limitations of mercury …
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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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Potential of Cyanobacterial Carbonate Precipitation for Concrete Restoration
… sonication tests, compressive strength tests and mercury intrusion tests. Results show that cyanobacteria were able to survive in cement solution for a certain period, the biotic-formed precipitates were different in morphology and achieved higher amount compared to abiotic-formed precipitates. In …
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MODELLING PORE-LEVEL PROPERTIES OF POROUS MATERIALS
… 77 software package, which uses information from mercury porosimetry curves, supported by image-analysed electron micrographs, to generate a three-dimensional representational model of the pore-space within a porous material. As a result of this project, a much-improved version has been produced. …
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Aspetti innovativi per la valutazione e la misura della porosità nei materiali dell'edilizia antica e moderna. La geometria frattale della porosità
… of porosity derived from the techniques of mercury intrusion and from the image analysis. Data elaboration was carried out according to established procedures of Fractal Geometry. It was found that certain classes of materials are clearly fractal and respond to simple patterns such as …
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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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Hierarchical Templates and Their Application to Multimodal Porous Materials Fabrication
… SEM, TEM, AFM, XPS, STEM, gas adsorption, and mercury intrusion porosity. The results indicate that the multimodal porous materials can be successfully fabricated using predefined hierarchical templates. The different arrangement (3D, 2D, 0D) of those templates and the independent tailorability …
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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
… 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 refining increased specific surface area, more so at the highest energy. Inverse gas …
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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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