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in subjects: "Bulk Density"  
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Influence of changing particle structure on the rate of gas-solid gasification reactions. Final report, July 1981-March 1984

Description: The objetive of this work is to determine the changes in the particle structure of coal as it undergoes the carbon/carbon dioxide reaction (C + CO/sub 2/ ..-->.. 2CO). Char was produced by heating the coal at a rate of 25/sup 0/C/min to the reaction temperatures of 800/sup 0/C, 900/sup 0/C, 1000/sup 0/C and 1100/sup 0/C. The changes in surface area and effective diffusivity as a result of devolitization were determined. Changes in effective diffusivity and surface area as a function of conversi… more
Date: April 4, 1984
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Method of recovery of alkali-metal constituents from coal-conversion residues. [Patent application]

Description: A coal gasification operation or similar conversion process is carried out in the presence of an alkali metal-containing catalyst producing char particles containing alkali metal residues. Alkali metal constituents are recovered from the particles by burning the particles to increase their size and density and then leaching the particles of increased size and density with water, to extract the water-soluble alkali metal constituents.
Date: April 22, 1981
Item Type: Refine your search to only Patent
Partner: UNT Libraries Government Documents Department
open access

Fabrication and characterization of MCC (Materials Characterization Center) approved testing material: ATM-10 glass

Description: The Materials Characterization Center ATM-10 glass represents a reference commercial high-level waste form similar to that which will be produced by the West Valley Nuclear Service Co. Inc., West Valley, New York. The target composition and acceptable range of composition were defined by the sponsor, West Valley Nuclear Service. The ATM-10 glass was produced in accordance with the Pacific Northwest Laboratory QA Manual for License-Related Programs, MCC technical procedures, and MCC QA Plan that… more
Date: April 1, 1988
Creator: Maupin, G. D.; Bowen, W. M. & Daniel, J. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Compressive behavior of fine sand.

Description: The compressive mechanical response of fine sand is experimentally investigated. The strain rate, initial density, stress state, and moisture level are systematically varied. A Kolsky bar was modified to obtain uniaxial and triaxial compressive response at high strain rates. A controlled loading pulse allows the specimen to acquire stress equilibrium and constant strain-rates. The results show that the compressive response of the fine sand is not sensitive to strain rate under the loading condi… more
Date: April 1, 2010
Creator: Martin, Bradley E. (Air Force Research Laboratory, Eglin, FL); Kabir, Md. E. (Purdue University, West Lafayette, IN); Song, Bo & Chen, Wayne (Purdue University, West Lafayette, IN)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Statistical Analysis and Geologic Evaluation of Laboratory-Derived Physical Property Data for Selected Nevada Test Site Core Samples of Non-Zeolitized Tuffs

Description: A statistical analysis and geologic evaluation of recently acquired laboratory-derived physical property data are being performed to better understand and more precisely correlate physical properties with specific geologic parameters associated with non-zeolitized tuffs at the Nevada Test Site. Physical property data include wet and dry bulk density, grain density (i.e., specific gravity), total porosity, and effective porosity. Geologic parameters utilized include degree of welding, lithology,… more
Date: April 20, 2009
Creator: National Security Technologies, LLC
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Carbon Sequestration in Reclaimed Mined Soils of Ohio

Description: This research project is aimed at assessing the soil organic carbon (SOC) sequestration potential of reclaimed minesoils (RMS). The experimental sites were characterized by distinct age chronosequences of reclaimed minesoil and were located in Guernsey, Morgan, Noble, and Muskingum Counties of Ohio. These sites are owned and maintained by Americal Electrical Power. These sites were reclaimed (1) with topsoil application, and (2) without topsoil application, and were under continuous grass or fo… more
Date: April 1, 2004
Creator: Shukla, M.K. & Lal, R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Sediment Properties: E-Area Completion Project

Description: To accommodate a future need for additional waste disposal facilities at the Savannah River Site, the Solid Waste Management Division (SWMD) designated nine additional plots for development (Kasraii 2007; SRS 2010); these plots are collectively known as the E Area Completion Project (ECP). Subsurface samples were collected from ECP plots 6, 7, 8 and 9 (Figure 1) for chemical and physical property analyses to support Performance Assessment (PA) and Special Analyses (SA) modeling. This document s… more
Date: April 29, 2011
Creator: Millings, M.; Bagwell, L.; Amidon, M. & Dixon, K.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

PRODUCTION OF NEW BIOMASS/WASTE-CONTAINING SOLID FUELS

Description: CQ Inc. and its team members (ALSTOM Power Inc., Bliss Industries, McFadden Machine Company, and industry advisors from coal-burning utilities, equipment manufacturers, and the pellet fuels industry) addressed the objectives of the Department of Energy and industry to produce economical, new solid fuels from coal, biomass, and waste materials that reduce emissions from coal-fired boilers. This project builds on the team's commercial experience in composite fuels for energy production. The elect… more
Date: April 20, 2001
Creator: Akers, David J.; Shirey, Glenn A.; Zitron, Zalman & Maney, Charles Q.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Structure and Properties of Braided Sleeve Preforms for Chemical Vapor Infiltration

Description: In all composites the properties and structure of the reinforcement strongly influence the performance of the material. For some composites, however, the reinforcement also affects the fabrication process itself exerting an additional, second order influence on performance. This is the case for the chemical vapor infiltration (CVI) process for fabrication of ceramic matrix composites. In this process the matrix forms progressively as a solid deposit, first onto the fiber surfaces, then onto the… more
Date: April 1, 1998
Creator: Starr, Thomas L.; Fiadzo, Odile G. & Hablutzel, Nicole
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Application of cathodic arc deposited amorphous hard carbon films to the head/disk tribology

Description: Amorphous hard carbon films deposited by filtered cathodic arc deposition exhibit very high hardness and elastic modulus, high mass density, low coefficient of friction, and the films are very smooth. All these properties are beneficial to applications of these films for the head/disk interface tribology. The properties of cathodic arc deposited amorphous carbon films are summarized, and they are compared to sputter deposited, hydrogenated (CH{sub x}), and nitrogenated (CN{sub x}) carbon films … more
Date: April 1998
Creator: Anders, S.; Bhatia, C. S.; Fong, W.; Lo, R. Y. & Bogy, D. B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical properties of a structural polyurethane foam and the effect of particulate loading

Description: The room temperature mechanical properties of a closed-cell, polyurethane encapsulant foam have been measured as a function of foam density. Tests were performed on both unfilled and filler reinforced specimens. Over the range of densities examined, the modulus of the unloaded foam could be described by a power-law relationship with respect to density. This power-law relationship could be explained in terms of the elastic compliance of the cellular structure of the foam using a simple geometric… more
Date: April 1, 1998
Creator: Goods, S.H.; Neuschwanger, C.L. & Whinnery, L.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Mechanical properties and shear failure surfaces of two alumina powders in triaxial compression

Description: In the manufacture of ceramic components, near-net-shape parts are commonly formed by uniaxially pressing granulated powders in rigid dies. Density gradients that are introduced into a powder compact during press-forming often increase the cost of manufacturing, and can degrade the performance and reliability of the finished part. Finite element method (FEM) modeling can be used to predict powder compaction response, and can provide insight into the causes of density gradients in green powder c… more
Date: April 24, 2000
Creator: Zeuch, David H.; Grazier, J. Mark; Arguello, Jose G., Jr. & Ewsuk, Kevin G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Effective porosity and pore-throat sizes of Conasauga Group mudrock: Application, test and evaluation of petrophysical techniques

Description: Effective porosity (specifically referring to the interconnected pore space) was recently recognized as being essential in determining the effectiveness and extent of matrix diffusion as a transport mechanism within fractured low-permeability rock formations. The research presented in this report was performed to test the applicability of several petrophysical techniques for the determination of effective porosity of fine-grained siliciclastic rocks. In addition, the aim was to gather quantitat… more
Date: April 1, 1996
Creator: Dorsch, J.; Katsube, T.J.; Sanford, W.E.; Dugan, B.E. & Tourkow, L.M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Compaction Stress in Fine Powders

Description: A vexing feature in granular materials compaction is density extrema interior to a compacted shape. Such inhomogeneities can lead to weaknesses and loss of dimensional control in ceramic parts, unpredictable dissolution of pharmaceuticals, and undesirable stress concentration in load-bearing soil. As an example, the centerline density in a cylindrical compact often does not decrease monotonically from the pressure source but exhibits local maxima and minima. Two lines of thought in the literatu… more
Date: April 1, 1999
Creator: Hurd, A. J.; Kenkre, V. M.; Pease, E. A. & Scott, J. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

An experimental comparison of laboratory techniques in determining bulk properties of tuffaceous rocks; Yucca Mountain Site Characterization Project

Description: Samples of tuffaceous rock were studied as part of the site characterization for a potential nuclear waste repository at Yucca Mountain in southern Nevada. These efforts were scoping in nature, and their results, along with those of other investigations, are being used to develop suitable procedures for determining bulk properties of tuffaceous rock in support of thermal and mechanical properties evaluations. Comparisons were made between various sample preparation, handling, and measurement te… more
Date: April 1, 1994
Creator: Boyd, P. J.; Martin, R. J., III & Price, R. H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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