WorldCat Identities

University of Wyoming Research Corporation Western Research Institute

Overview
Works: 285 works in 362 publications in 1 language and 932 library holdings
Genres: Conference proceedings 
Roles: Researcher
Classifications: TE275, 625.85
Publication Timeline
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Most widely held works by University of Wyoming Research Corporation
Fundamental properties of asphalts and modified asphalts ( Book )
4 editions published in 2001 in English and held by 121 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
Microdamage healing in asphalt and asphalt concrete ( Book )
2 editions published in 2001 in English and held by 107 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
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 68 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 55 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 34 WorldCat member libraries worldwide
Seventeenth Oil Shale Symposium proceedings by Oil Shale Symposium ( Book )
2 editions published in 1984 in English and held by 30 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."
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 ( Book )
3 editions published in 2001 in English and held by 21 WorldCat member libraries worldwide
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
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
An investigation of the role of water on retrograde ( )
10 editions published between 1992 and 1994 in English and held by 10 WorldCat member libraries worldwide
The overall objectives of this work are to conduct research that will provide the basis for an improved liquefaction process, and to facilitate our understanding of those processes that occur when coals are initially dissolved. Changes in coal structure that occur during coal drying and steam pretreatments will be measured in order to determine what effect water has on retrograde/condensation reactions, and to determine the mechanism by which water enhances coal reactivity toward liquefaction. Different methods for coal drying will be investigated to determine if drying can be accomplished without destroying coal reactivity toward liquefaction, thereby making coal drying a relatively economical and efficient method for coal pretreatment. Coal drying methods will include conventional thermal drying, microwave drying, and chemical drying at low temperature. State-of-the-art solid-state nuclear magnetic resonance (NMR) techniques using combined rotation and multiple pulse spectroscopy (CRAMPS) and cross polarization with magic-angle spinning (CP/MAS) will be employed: (1) to measures changes in coal structure brought about by the different methods of drying and by low temperature oxidation, and (2) to obtain direct measurements of changes in the aromatic hydrogen-to-carbon ratio of the solid/semi-solid material formed or remaining during pretreatment and the initial stages of liquefaction. The aromatic hydrogen-to-carbon ratios are difficult, if not impossible, to measure without the use of solid-state NMR, and as a result this ratio will be used to monitor the retrograde/condensation reactions that take place during coal liquefaction in the presence and absence of steam and various inert gases
Proceedings of the 1986 Tar Sands Symposium by WRI-DOE Tar Sand Symposium ( Book )
3 editions published in 1986 in English and held by 6 WorldCat member libraries worldwide
WRI-DOE Tar-Sand Symposium by WRI-DOE Tar-Sand Symposium ( Book )
1 edition published in 1984 in English and held by 6 WorldCat member libraries worldwide
Nineteenth Oil Shale Symposium proceedings by Oil Shale Symposium ( Book )
2 editions published in 1986 in English and held by 6 WorldCat member libraries worldwide
Fundamental properties of asphalts and modified asphalts ( Book )
1 edition published in 2001 in English and held by 5 WorldCat member libraries worldwide
Development of an advanced continuous mild gasification process for the production of coproducts. Final report ( )
5 editions published between 1990 and 1991 in English and held by 5 WorldCat member libraries worldwide
This report is a final brief summary of development of a mild-gasification and char conversion process. Morgantown Energy Technology Center developed a concept called mild gasification. In this concept, devolatilization of coal under nonoxidizing and relatively mild temperature and pressure conditions can yield three marketable products: (1) a high-heating-value gas, (2) a high-aromatic coal liquid, and (3) a high-carbon char. The objective of this program is to develop an advanced, continuous, mild-gasification process to produce products that will make the concept economically and environmentally viable. (VC)
Removal of Mercury from Coal-Derived Synthesis Gas ( )
2 editions published between 2005 and 2006 in English and held by 4 WorldCat member libraries worldwide
The reduction of mercury emission from fossil fuel applications is an increasing priority for the US power industry due to regulatory pressure. While mercury removal during combustion is well studied, mercury removal in gasification is less so. The increasing application of coal gasification in future plant designs supplies the incentive for more study of mercury removal gasification processes. In gasification where the mercury is expected to be elemental, activated carbon injection has been the most effective method of mercury removal. Absorption of elemental mercury at high temperature has not been shown to be effective. The carbon is best injected downstream where the temperature has moderated and an independent collector can be established. Experiments have been conducted at 400 F to compare mercury absorption on activated carbon as received and ''super'' activated carbon. The ''super'' activated carbon was prepared by soaking the carbon in 6M nitric acid followed by neutralization and washing. Each absorption experiment has been run for 16 hours of exposure time to the gasifier product stream. The carbon samples were tested for mercury absorption by ICP hydride generation. The two carbon samples which had been washed in nitric acid then exposed to the gasifier slipstream showed higher concentrations of mercury even at this elevated absorption temperature when compared to the as received activated carbon
Results of phase I postburn drilling and coring, Rocky Mountain 1 underground coal gasification site, Hanna Basin, Wyoming by S. R Lindblom ( Book )
3 editions published in 1990 in English and held by 4 WorldCat member libraries worldwide
The Rocky Mountain 1 (RM1) Underground Coal Gasification (UCG) test consisted of two different module configurations: the controlled retracting injection point (CRIP) and elongated linked well (ELW) configurations. The postburn coring of the RM1 UCG site was designed in two phases to fulfill seven objectives outlined in the Western Research Institute's (WRI) annual project plan for 1988--1989. The seven objectives were to (1) delineate the areal extent of the cavities, (2) identify the extent of roof collapse, (3) obtain samples of all major cavity rock types, (4) characterize outflow channels and cavity stratigraphy, (5) characterize the area near CRIP points and ignition points, (6) further define the structural geology of the site, and (7) identify the vertical positioning of the horizontal process wells within the coal seam. Phase 1 of the coring was completed in the summer of 1989 and served to partially accomplish all seven objectives. In relation to the seven objectives, WRI determined that (1) the ELW cavity extends farther to the west and the CRIP cavity was located 5--10 feet farther to the south than anticipated; (2) roof collapse was contained within unit A in both modules; (3) samples of all major rock types were recovered; (4) insufficient data were obtained to characterize the outflow channels, but cavity stratigraphy was well defined; (5) bore holes near the CRIP points and ignition point did not exhibit characteristics significantly different from other bore holes in the cavities; (6) a fault zone was detected between VIW=1 and VIW-2 that stepped down to the east; and (7) PW-1 was only 7--12 feet below the top of the coal seam in the eastern part of the ELW module area; and CIW-1 was located 18--20 feet below the top of the coal seam in the CRIP module area. 7 refs., 7 figs., 1 tab
 
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Alternative Names
Western Research Institute
Western Research Institute (Laramie, Wyo.)
WRI
Languages
English (65)