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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 29 for “"volumetric properties"”.
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Phase equilibria and volumetric properties for the system NaCl-CaCl₂-H₂O
… span the pressure and temperature of earlier volumetric studies and extend to higher molalities than reported previously. The relative densities have been fitted as apparent molar volumes (V<sub>Φ</sub>) using the Pitzer ion-interaction treatment, with appropriate expressions chosen for the …
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The Volumetric Properties for Selected Impurities in Dense CO2 Destined for Re-Injection
… These impurities can impact the thermophysical properties and chemical equilibria within the fluid stream. In this work, the volumetric influence of H2S, COS, CS2, SO2, and O2 impurities in a dense CO2 phase were studied through high-precision density measurements. The densities were used in …
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Volumetric Properties and Viscosity of Fluid Mixtures at High Pressures: Lubricants and Ionic Liquids
The present thesis explores the volumetric and transport properties of complex fluid mixtures under pressure in order to develop a better, more holistic understanding of the relationship between the volumetric properties, derived thermodynamic properties, and viscosity. To accomplish this broad …
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Volumetric Properties and Viscosity of Lubricant Oils and the Effects of Additives at High Pressure and Temperatures
… to the characterization of the thermodynamic properties and viscosity of lubricant base oils modified with polymeric additives. Several groups of mineral and synthetic base oils, including Ultra S4, Ultra S8, and poly alpha olefin PAO 4 have been studied. Among the various types of additives …
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Experimental determination of the volumetric properties for the system CO₂-CH₄-N₂ at 100-1000 bars and 50-300°C
… wide variety of geologic environments. However, volumetric data for gaseous mixtures are scarce, particularly at high pressures and temperatures. In this study, the volumetric properties of binary and ternary mixtures in the system CO₂-CH₄-N₂ were measured at 100-1000 bars, 50-300°C, using a …
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Fluid-phase thermodynamics from molecular-level properties and interactions based in quantum theory
… software packages are used to calculate rigorous properties of the functional groups within molecules of interest. These properties are incorporated into an intermolecular potential energy function which describes interactions between entire molecules as a set of interactions between functional …
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Short-term Comparison of Frictional Properties of Superpave and Balance Mix Design Hot Mix Asphalt Mixes
… rutting, the implemented level 1 only considered volumetric properties and not mixture performance tests. Therefore, development in the asphalt community has addressed some of the issues with the Superpave mix design, e.g., cracking and raveling, with the Balance Mix Design (BMD) approaches. The …
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Asphalt Mixture Design Concepts to Develop Aggregate Interlock
… of that aggregate structure and mixture volumetric properties. This paper presents mixture design concepts that utilize aggregate interlock and aggregate packing to develop an aggregate blend that meets volumetric criteria and provides adequate compaction characteristics. The presented …
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A Laboratory Study on the Effect of High Rap and High Asphalt Binder Content on the Performance of Asphalt Concrete
… asphalt binder content on the performance and volumetric properties of asphalt concrete mixes containing Reclaimed Asphalt Pavement (RAP). Mixes with three different percentages of RAP (0%, 20%, 40%) obtained from an asphalt producer and three different percentages of asphalt binder (design …
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Thermodynamic calculations with TK!Solver
… been developed. Program ESTATE.TK calculates volumetric properties of compounds using the ideal gas law, Pitzer correlation, van der Waals, Redlich-Kwong, Dieterici, or Berthelot equation of state. The volumetric properties include temperature, pressure, volume, and compressibility factor. …
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Development of Laboratory to Field Shift Factors for Hot-Mix Asphalt Resilient Modulus
… This could be due to the difference in the volumetric properties of both mixes; where F/F specimens had greater air voids content than F/L specimens. A compaction shift factor of 1.45 to 1.50 between the F/F and F/L specimens was introduced. The load was found to have no effect on resilient …
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Characterization of High Porosity Drainage Layer Materials for M-E Pavement Design
… objective of this study is to characterize the properties of typically adopted drainage layer materials in VA, OK, and ID. A series of laboratory tests have been conducted to quantify the volumetric properties, permeability and mechanical properties of the laboratory-compacted asphalt treated …
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Characterization of the cellular structure of foamed cement using x-ray computed tomography
… total. The quantitative analysis included bulk volumetric properties of all 12 samples. One sample from each target density was further investigated to determine the air bubble size distributions that comprise the cellular structure of foamed cement. Following the quantitative analysis, 3D …
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Investigating Use of Aggregate Density to Develop Design Aggregate Structure for Asphalt Concrete Mixtures
… Method as a means for estimating changes in mix volumetric properties with changes to aggregate gradation. Aggregate density at various locking point definitions, as well as, N des and Nmax of 80 and 125 gyrations respectively, were evaluated to assess the effects of compacting to current Ndes …
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Balanced Mix Design of Asphalt Mixtures for Intersections
… methods are structured around meeting a range of volumetric requirements. Although this allows for volumetric parameters to be monitored and controlled during production, it does not give the engineering insight necessary to guarantee good performance. The overall objective of this research is to …
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Evaluation of physical properties of ionic liquids
Firstly, experimental data for ionic liquids properties; density, viscosity of pure ionic liquids, viscosity of binary ionic liquid mixtures, and solubility in molecular solvents were collected from the literature and thus four databases were compiled. Then mathematical gnostics was used to analyse …
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Experimental Study of the PVTX Properties in Part of the Ternary System H₂O-NaCl-CO₂
Phase equilibria and volumetric properties in the system water-sodium chloride-carbon dioxide were determined experimentally for pressures between about 1 to 6 kbar, temperatures of 300° to 800°C, and fluid compositions up to 40 wt% NaCl and 20 mol% carbon dioxide, both relative to water. This was …
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Digital Mix Design for Performance Optimization of Asphalt Mixture
… of a gradation, asphalt content, other volumetric properties, the evaluation of mechanical properties and moisture damage potentials. In this study, a computational method is developed to aid mix design. Discrete element method (DEM) was used to simulate the formation of skeleton and …
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Miscibility, Viscosity, Density, and Formation of Polymers in High-Pressure Dense Fluids
… investigation of the phase behavior, volumetric properties, and viscosity of poly (methyl methacrylate) (PMMA), poly (ε-caprolactone) (PCL) and their blends. Homopolymerization and copolymerizations of methyl methacrylate (MMA) and 2-methylene-1,3-dioxepane (MDO) in mixtures of acetone …
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Thermodynamics of geologic fluids
… of heat and mass transfer in the Earth. The properties of geologic fluids can be diverse, as fluids occur at conditions ranging from ambient temperatures and pressures at Earth's surface, to extreme temperatures and pressures in Earth's deep interior. Regardless the wide ranges of conditions …
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