Results 251 to 260 of about 114,535 (299)
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New Zealand Journal of Agricultural Research, 1965
Abstract For 35 New Zealand soil samples of varied origin, estimates of total porosity and macro‐porosity group were compared with measurements of these properties in an endeavour to judge the feasibility of making such estimates as part of the pedological field description. The estimates of total porosity group were
D.C. McDonald, R. Julian
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Abstract For 35 New Zealand soil samples of varied origin, estimates of total porosity and macro‐porosity group were compared with measurements of these properties in an endeavour to judge the feasibility of making such estimates as part of the pedological field description. The estimates of total porosity group were
D.C. McDonald, R. Julian
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Cold Regions Science and Technology, 2006
Abstract A permeability–porosity relationship is obtained for use in computational fluid dynamics (CFD) modelling of desalination and fluid flow in sea ice. This functional relationship is derived from laboratory data from the literature on unidirectional saltwater ice formation.
Chris Petrich +2 more
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Abstract A permeability–porosity relationship is obtained for use in computational fluid dynamics (CFD) modelling of desalination and fluid flow in sea ice. This functional relationship is derived from laboratory data from the literature on unidirectional saltwater ice formation.
Chris Petrich +2 more
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SPE Annual Technical Conference and Exhibition, 2002
Abstract A technique for the primary and secondary porosity estimation is proposed. This technique is based on a resistivity model of carbonate formations with double porosity and the analysis of numerous core data. The resistivity model consists of an isotropic conductive matrix with a primary porous system and inclusions, which ...
Kazatchenko Elena, Mousatov Aleksandr
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Abstract A technique for the primary and secondary porosity estimation is proposed. This technique is based on a resistivity model of carbonate formations with double porosity and the analysis of numerous core data. The resistivity model consists of an isotropic conductive matrix with a primary porous system and inclusions, which ...
Kazatchenko Elena, Mousatov Aleksandr
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Chinese Physics Letters, 2013
We present an inverse analysis of the conductive and radiative heat transfer problem in fibrous porous materials. The porosity and total heat transmission are simultaneously recovered in the finite-volume method and genetic algorithm scheme for both uniform and nonuniform porosity distributions.
You-Sheng Xu +3 more
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We present an inverse analysis of the conductive and radiative heat transfer problem in fibrous porous materials. The porosity and total heat transmission are simultaneously recovered in the finite-volume method and genetic algorithm scheme for both uniform and nonuniform porosity distributions.
You-Sheng Xu +3 more
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Journal of Biochemical Toxicology, 1977
AbstractThe alite used in this investigation was synthesised from the stoichiometric mixture at 1550°C. The hardened alite pastes were made using initial water/alite ratios of 0.20, 0.30, 0.45 and 0.60. Degree of hydration, compressive strength and total porosity were estimated at various hydration time intervals of 0.5 h, 2 h, 6 h, 1 day, 3 days, 7 ...
Salah A. Abo‐El‐Enein +3 more
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AbstractThe alite used in this investigation was synthesised from the stoichiometric mixture at 1550°C. The hardened alite pastes were made using initial water/alite ratios of 0.20, 0.30, 0.45 and 0.60. Degree of hydration, compressive strength and total porosity were estimated at various hydration time intervals of 0.5 h, 2 h, 6 h, 1 day, 3 days, 7 ...
Salah A. Abo‐El‐Enein +3 more
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A Field Measurement of Total Porosity and Surface Microrelief of Soils
Soil Science Society of America Journal, 1963Abstract Total porosity of the layer to be plowed was estimated from undisturbed cores collected before primary tillage. Using a point quadrant instrument, soil surface elevation measurements were made before and after preplant tillage, and after each cultivation to determine the effects of tillage on total porosity of the plowed ...
R. E. Burwell +2 more
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Applying NMR Total and Effective Porosity to Formation Evaluation
SPE Annual Technical Conference and Exhibition, 1997Abstract The porosity of a reservoir and its water saturation fraction have long been at the heart of wireline and MWD log based formation evaluation. In many formations, however, the complexity of the mineralogy and the properties of the formation's conductivity have only permitted qualitative answers.
George Coates +3 more
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Journal of Applied Chemistry and Biotechnology, 1974
AbstractHardened blast‐furnace slag‐cement pastes were prepared from cements of different Blaine areas, and mixed with various water/cement ratios in the range 0.20–0.70. The pastes were cured for various periods ranging from 1 to 365 days, and the degree of hydration, total porosities, and compressive strengths were determined.
R. Sh. Mikhail +2 more
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AbstractHardened blast‐furnace slag‐cement pastes were prepared from cements of different Blaine areas, and mixed with various water/cement ratios in the range 0.20–0.70. The pastes were cured for various periods ranging from 1 to 365 days, and the degree of hydration, total porosities, and compressive strengths were determined.
R. Sh. Mikhail +2 more
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Cement and Concrete Research, 1972
Abstract The degree of hydration, the expansion during hydration, and the total porosity of low-porosity portland cement pastes were investigated at hydration times ranging from 1 hour to 180 days. The effects of the type of cement (Type I and II), the grinding aid, the surface of the cement, the water-cement ratio (0.2 and 0.3), and the temperature ...
Ivan Odler +3 more
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Abstract The degree of hydration, the expansion during hydration, and the total porosity of low-porosity portland cement pastes were investigated at hydration times ranging from 1 hour to 180 days. The effects of the type of cement (Type I and II), the grinding aid, the surface of the cement, the water-cement ratio (0.2 and 0.3), and the temperature ...
Ivan Odler +3 more
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Total Porosity and Bound-Fluid Measurements From an NMR Tool
Journal of Petroleum Technology, 1997New measurements recently available from a pulse-echonuclearmagnetic-resonance (NMR) tool enhance the usefulness of this logging technique. These include total NMR porosity and bound-fluid measurements. TotalNMR porosity provides a complete analysis of a reservoir's fluid volumes, including what is trapped in the very smallest pores associated with ...
Greg Gubelin, Austin Boyd
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