WorldCat Identities

University of Wyoming Research Corporation Western Research Institute

Overview
Works: 337 works in 394 publications in 1 language and 1,667 library holdings
Genres: Conference proceedings  Periodicals 
Roles: Researcher
Classifications: TE275, 625.85
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Most widely held works about University of Wyoming Research Corporation
 
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Most widely held works by University of Wyoming Research Corporation
Microdamage healing in asphalt and asphalt concrete( Book )

2 editions published in 2001 in English and held by 113 WorldCat member libraries worldwide

The primary objectives of the study were to: (1) Demonstrate that microdamage healing occurs and that it can be measured in the laboratory and in the field, (2) Confirm that the same fracture properties that control propagation of visible cracks control the propagation of microcracks, (3) Identify the asphalt constituents which influence microdamage and microdamage healing, (4) Establish appropriate correlations between microdamage and microdamage healing in the laboratory and in the field, and (5) Predict the effect of microdamage healing on pavement performance and develop the appropriate constitutive damage models that account for the effects of microdamage healing on the performance of asphalt concrete pavement layers
Fundamental properties of asphalts and modified asphalts( Book )

3 editions published in 2001 in English and held by 106 WorldCat member libraries worldwide

Chemical composition of asphalt as related to asphalt durability : state of the art by J. Claine Petersen( Book )

3 editions published in 1984 in English and held by 70 WorldCat member libraries worldwide

The literature relating asphalt chemical composition and asphalt durability was reviewed and interpreted. Two major chemical factors affecting asphalt durability are 1) compatibility of the interacting asphalt components and 2) resistance to change from oxidative aging
Chemical properties of asphalts and their effects on pavement performance by Raymond E Robertson( Book )

1 edition published in 2000 in English and held by 53 WorldCat member libraries worldwide

The purpose of this Circular is to familiarize the asphalt user with the source of asphalt, the variable chemistry of asphalt, why variable performance should be expected when asphalt is used in roadways and what is currently missing from the specification process. Several areas are identified where refinements in the specification process would improve the ability to classify asphalts by their expected performance. This Circular summarizes more than 2,500 pages written during the past 20 years on the effects of fundamental chemistry on the rheological properties of asphalt. This Circular should be especially useful to civil engineering students who intend to work in some highway construction-related business
Engineering and environmental aspects of recycled materials for highway construction : appendix 1( Book )

1 edition published in 1993 in English and held by 36 WorldCat member libraries worldwide

Seventeenth Oil Shale Symposium proceedings by Oil Shale Symposium( Book )

2 editions published in 1984 in English and held by 29 WorldCat member libraries worldwide

Microdamage healing in asphalt and asphalt concrete by Robert L Lytton( Book )

2 editions published in 2001 in English and held by 24 WorldCat member libraries worldwide

Microdamage healing in asphalt and asphalt concrete by Robert L Lytton( Book )

2 editions published in 2001 in English and held by 24 WorldCat member libraries worldwide

"Volume 3 documents the development of a micromechanics fracture and healing model for asphalt concrete. This model can be used to calculate the density and growth of microcracks during repeated direct tensile controlled-strain loading. The model is based on a relationship among stiffness changes in the mixture as damage occurs, the rate of change in dissipated pseudo strain energy as loading are applied to the samples and as damage occurs and mixture properties including crack length changes upon loading and mixture cohesive surface energies. The report demonstrates that microcrack growth is the dominate mode of distress at temperatures below 25C and that microcrack healing is the dominate mode of recovery of dissipated pseudo strain energy at these test temperatures. However, at temperatures above about 25C, the predominate mode of distress is plastic damage. Cracking rates during fatigue damage are related to de-wetting cohesive surface energy measurements of the bitumen whereas microcracking healing rates are related to wetting cohesive surface energy measurements of the bitumen. Surface energies of five bitumens with widely different chemical compositions were found to correlate strongly with healing properties as defined by viscoelastic fracture and healing theory."
Fundamental properties of asphalts and modified asphalts( Book )

1 edition published in 2001 in English and held by 20 WorldCat member libraries worldwide

The Superpave binder specification developed during the Strategic Highway Research Program (SHR)) from 1987-1993 classifies construction grade asphalts into rheologically similar groups. All asphalts in a given grade have the same rheological properties to within 6 deg C. The mission of this project was to improve the understanding of the expected performance of petroleum asphalts under service conditions. These conditions include physical behavior of thin asphalt films in contact with aggregate, rheology and oxidative aging of wet asphalt, behavior of asphalt after extended aging, and propensity of asphalt films to reconsolidate ("heal") after microcracking. These phenomena are not described by the current binder specification. The results of said exposures are included in Volume I and have been used to produce a comprehensive chemical model of petroleum asphalt. Finally, the results have been used to develop new analytical methods that improve the capability to predict performance of asphalt in roadway service. These 16 new tests are described in Volume II
Eighteenth Oil Shale Symposium proceedings by Oil Shale Symposium( Book )

1 edition published in 1985 in English and held by 19 WorldCat member libraries worldwide

Microdamage healing in asphalt and asphalt concrete( Book )

2 editions published in 2001 in English and held by 15 WorldCat member libraries worldwide

Microdamage healing in asphalt and asphalt concrete( Book )

2 editions published in 2001 in English and held by 14 WorldCat member libraries worldwide

Chemical properties of asphalts and their relationship to pavement performance by Raymond E Robertson( Book )

2 editions published in 1991 in English and held by 11 WorldCat member libraries worldwide

The study considers the chemistry of petroleum asphalt at the molecular and intermolecular levels. Thousands of molecular species exist within any particular asphalt. The polarity among asphalt molecules varies widely and the physical properties are governed by the balances of polars and nonpolar components. Several speculations on the effects of chemical composition on pavement performance are offered. In general, the mechanical or structural properties of asphalt are related to the intermolecular structuring among the polars. This report describes the current status of the Strategic Highway Research Program chemical studies of petroleum asphalt. It is intended to be instructive to the non-chemist, and is a speculative effort to correlate some of the known chemical properties of asphalts with pavement performance characteristics
Annual technical progress report by University of Wyoming Research Corporation( )

in English and held by 2 WorldCat member libraries worldwide

Methods for the speciation and determination of arsenic and selenium in coal combustion products( )

2 editions published in 1991 in English and held by 0 WorldCat member libraries worldwide

Methods of sample preparation for the determination of total selenium, and selenite, selenate, arsenite, and arsenate in coal fly ash materials were evaluated. The measurement methods use atomic spectroscopy for the determination of total concentrations and ion chromatography (IC) for the determination of individual ionic species. Sample preparation procedures which minimize the loss or alteration of the species of interest was explored and defined. The utility of the sample preparation methods can be sample dependent, so caution is advised in their use. IC conditions were established for the determination in extract solutions of selenite, selenate, arsenite, and arsenate with minimal interference from common anions
Characterization of the WRI entrained-flow reactor( )

2 editions published in 1991 in English and held by 0 WorldCat member libraries worldwide

The ultimate goal of the current research has been to obtain kinetic and stoichiometric data on the high-heating-rate pyrolysis of a western oil shale. To accomplish this, a reactor system had to be chosen that could attain the high heating rates observed in fluid beds, but avoid some of their limitations. one of the most favorable high-heating-rate systems for accurate reaction research is an entrained-flow reactor. With proper design, heating rates can equal and surpass those observed in fluid-bed reactors, and product recovery is simpler and more efficient. To obtain the larger amounts of solid and liquid products needed for detailed chemical and physical analyses, the system need only be run for a longer time. Western Research Institute has designed, constructed, and begun operating a high-heating-rate, pressurized, entrained-flow reactor system. This reactor system was developed to provide kinetic and stoichiometric data on the high-heating-rate pyrolysis of oil shale and to optimize operating conditions for the scale-up of a proprietary commercial process. This report describes the reactor system and its performance characteristics
Bell Pole CROW pilot test results and evaluation( )

2 editions published in 1992 in English and held by 0 WorldCat member libraries worldwide

Beginning in 1990, efforts were initiated to implement an in situ remediation project to address the creosote and pentachlorophenol (PCP) contaminated surficial aquifer at the Bell Lumber and Pole Company (Bell Pole) Site. The remediation project involves the application of the Contained Recovery of Oily Wastes (CROW[trademark]) process which consists of hot-water injection to displace and recover the non-aqueous phase liquids (NAPL). Based on the results from the pilot test the following conclusions can be made: (1) The pilot test provided sufficient hydraulic information to design the full-scale CROW remediation system. The pumping test portion of the pilot test indicated uniform aquifer properties. The entire thickness of the aquifer reached the target temperature range and containment of the injected hot water was achieved. (2) Pretest injection and production rate predictions were achieved. (3) The post test soil boring data indicated hot-water injection displaced greater than 80% of the NAPL near the injection well. The data indicates that a NAPL saturation of approximately 19% (pore volume basis) and a 500 fold decrease in PCP concentration can be achieved with 20 pore volumes of flushing. (4) The treatment system used during the pilot test was effective in reducing PCP and PAH compounds to concentrations acceptable for sanitary sewer discharge. (5) The microbial assay of the post test samples found an encouraging increase in microbial population compared to earlier data collected before the pilot test
Preparation for upgrading western subbituminous coal( )

2 editions published in 1990 in English and held by 0 WorldCat member libraries worldwide

The objective of this project was to establish the physical and chemical characteristics of western coal and determine the best preparation technologies for upgrading this resource. Western coal was characterized as an abundant, easily mineable, clean, low-sulfur coal with low heating value, high moisture, susceptibility to spontaneous ignition, and considerable transit distances from major markets. Project support was provided by the Morgantown Energy Technology Center (METC) of the US Department of Energy (DOE). The research was conducted by the Western Research Institute, (WRI) in Laramie, Wyoming. The project scope of work required the completion of four tasks: (1) project planning, (2) literature searches and verbal contacts with consumers and producers of western coal, (3) selection of the best technologies to upgrade western coal, and (4) identification of research needed to develop the best technologies for upgrading western coals. The results of this research suggest that thermal drying is the best technology for upgrading western coals. There is a significant need for further research in areas involving physical and chemical stabilization of the dried coal product. Excessive particle-size degradation and resulting dustiness, moisture reabsorption, and high susceptibility to spontaneous combustion are key areas requiring further research. Improved testing methods for the determination of equilibrium moisture and susceptibility to spontaneous ignition under various ambient conditions are recommended
An evaluation of some innovative fragmentation systems for oil shale( )

2 editions published in 1991 in English and held by 0 WorldCat member libraries worldwide

This report describes a large-scale underground mining method, large-hole stoping, using some innovative fragmentation systems (buffer blasting, continuous loading/hauling, and mechanical miners for development). This study includes a literature review and an experimental study of one of the key design factors--buffer blasting. The purpose of the buffer-blasting experiments is to examine the swell that is necessary to achieve satisfactory fragmentation results. The study also includes a technical and economic evaluation of the new mining method compared with conventional room and pillar mining. The purpose of this study is to examine innovative methods that exist today and may provide a more efficient mining system than that currently used. Note that this is a conceptual study, and that the mining for the two mine designs were compared using a daily production rate of 75,000 tones per day. This amount was chosen because it is the maximum amount possible for a rubber-tired room and pillar operation with only a one-shaft complex
Oil shale, tar sand, coal research, advanced exploratory process technology jointly sponsored research( )

3 editions published in 1992 in English and held by 0 WorldCat member libraries worldwide

Progress made in five research programs is described. The subtasks in oil shale study include oil shale process studies and unconventional applications and markets for western oil shale. The tar sand study is on recycle oil pyrolysis and extraction (ROPE) process. Four tasks are described in coal research: underground coal gasification; coal combustion; integrated coal processing concepts; and sold waste management. Advanced exploratory process technology includes: advanced process concepts; advanced mitigation concepts; and oil and gas technology. Jointly sponsored research covers: organic and inorganic hazardous waste stabilization; CROW field demonstration with Bell Lumber and Pole; development and validation of a standard test method for sequential batch extraction fluid; PGI demonstration project; operation and evaluation of the CO[sub 2] HUFF-N-PUFF process; fly ash binder for unsurfaced road aggregates; solid state NMR analysis of Mesaverde group, Greater Green River Basin, tight gas sands; flow-loop testing of double-wall pipe for thermal applications; shallow oil production using horizontal wells with enhanced oil recovery techniques; NMR analysis of sample from the ocean drilling program; and menu driven access to the WDEQ hydrologic data management system
 
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Alternative Names
Western Research Institute

Western Research Institute (Laramie, Wyo.)

WRI

Languages
English (53)