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Kee Foo - One of the best experts on this subject based on the ideXlab platform.
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Strategic highway Research Program properties of asphalt cement
Transportation Research Record, 1995Co-Authors: Douglas I Hanson, Rajib B. Mallick, Kee FooAbstract:In the spring of 1993 the Strategic Highway Research Program (SHRP) asphalt Research Program was completed. As the result of that effort a new specification for asphalt cements was developed along with new testing procedures. The results of a study of asphalts being used in the southeastern United States in which the asphalts were tested by using the current capillary tube testing technology and the new SHRP technology are presented. Fifty-eight asphalt cements from throughout the United States were tested. Viscosity of neat asphalt cements (60 deg C) showed strong correlations with dynamic shear rheometer stiffness at 60 deg C and 70 deg C. For the asphalt cements tested, the value of the slope of the log stiffness-versus-time curve obtained from regressed stiffness S-versus-m data from bending beam rheometer tests corresponding to an S value of 300 MPa was found to be 0.27.
Robert C. Johns - One of the best experts on this subject based on the ideXlab platform.
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TOWARD A BALANCED TRANSPORTATION Research Program
Transportation Research Record, 1991Co-Authors: Robert C. JohnsAbstract:National interest in transportation Research is increasing. The advancement of U.S. transportation technology and expertise is one of the six major themes of the U.S. Department of Transportation policy plan published in February 1990. Research is cited as a strategy for maintaining a competitive economy and for meeting social goals. This belief is becoming widespread at the state level also, as transportation problems such as traffic congestion become more critical. However, there are challenges in developing transportation Research Programs to meet these needs. First, transportation is a broad field with many constituencies; there is disagreement over what type of Research is most urgent. Second, consensus on the value and purpose of Research is often lacking, particularly regarding the differences over basic versus applied Research. These two challenges to developing transportation Research Programs are serious, at times causing disunity among parties who should have common interests. In Minnesota, the University of Minnesota Center for Transportation Studies has worked to develop a balanced transportation Research Program through a strategic planning process that is highly participatory. In this paper, the processes used are described, results are evaluated, and plans for the future are presented. Conclusions from the Minnesota experience that could be applied in the development of a national transportation Research Program are also presented.
Douglas I Hanson - One of the best experts on this subject based on the ideXlab platform.
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Strategic highway Research Program properties of asphalt cement
Transportation Research Record, 1995Co-Authors: Douglas I Hanson, Rajib B. Mallick, Kee FooAbstract:In the spring of 1993 the Strategic Highway Research Program (SHRP) asphalt Research Program was completed. As the result of that effort a new specification for asphalt cements was developed along with new testing procedures. The results of a study of asphalts being used in the southeastern United States in which the asphalts were tested by using the current capillary tube testing technology and the new SHRP technology are presented. Fifty-eight asphalt cements from throughout the United States were tested. Viscosity of neat asphalt cements (60 deg C) showed strong correlations with dynamic shear rheometer stiffness at 60 deg C and 70 deg C. For the asphalt cements tested, the value of the slope of the log stiffness-versus-time curve obtained from regressed stiffness S-versus-m data from bending beam rheometer tests corresponding to an S value of 300 MPa was found to be 0.27.
E T Harrigan - One of the best experts on this subject based on the ideXlab platform.
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superior performing asphalt pavements superpave the product of the shrp asphalt Research Program
1994Co-Authors: T W Kennedy, E T Harrigan, G A Huber, R J Cominsky, Chuck S Hughes, H Von Quintus, James S MoulthropAbstract:The Strategic Highway Research Program (SHRP) was a highly focused, ambitious Research effort that targeted four specific areas for intense study over the time frame from 1987 to 1993. Asphalt was one of the four study areas. This report describes the Superpave system, the final product of the asphalt Research Program; and the various parts that comprise its operational characteristics. In all, the final report of the SHRP Asphalt Research Program consists of five parts, the contents of which are briefly described in this report. Reference is made within this report to specific details within the other four parts for readers who want a more detailed description of the methodology, test methods, and theory behind Superpave.
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THE SHRP ASPHALT Research Program PRODUCTS
1990Co-Authors: T W Kennedy, E T HarriganAbstract:This paper describes the progress of the Strategic Highway Research Program (SHRP) Asphalt Research Program since 1987, with emphasis on the primary products of the Program, viz. performance-based specifications for asphalt binders and asphalt-aggregate mixtures. Two unique features of the SHRP Research Program are its accelerated nature and its reliance on what may be termed "just in time" results. In each SHRP area, a goal is established and the results necessary to obtain it are defined. Since SHRP has a firm completion date of 31 March 1993, all the contracts in the asphalt Program are planned on a tight schedule that does not allow work to be accomplished in the sequential manner often used by Researchers. Rather, all the major contracts are proceeding simultaneously with continual coordination as required to assure that the results needed from each are delivered successfully and on schedule. In the period through mid-1989, three major components of the Program have been established: (1) binder characterization and evaluation; (2) testing and measuring of asphalt-aggregate interactions and mixtures; and (3) asphalt modification. Although the Research studies implementing these components are still in their early phases, important and useful results have already been realized and are reviewed in this paper.
Rajib B. Mallick - One of the best experts on this subject based on the ideXlab platform.
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Strategic highway Research Program properties of asphalt cement
Transportation Research Record, 1995Co-Authors: Douglas I Hanson, Rajib B. Mallick, Kee FooAbstract:In the spring of 1993 the Strategic Highway Research Program (SHRP) asphalt Research Program was completed. As the result of that effort a new specification for asphalt cements was developed along with new testing procedures. The results of a study of asphalts being used in the southeastern United States in which the asphalts were tested by using the current capillary tube testing technology and the new SHRP technology are presented. Fifty-eight asphalt cements from throughout the United States were tested. Viscosity of neat asphalt cements (60 deg C) showed strong correlations with dynamic shear rheometer stiffness at 60 deg C and 70 deg C. For the asphalt cements tested, the value of the slope of the log stiffness-versus-time curve obtained from regressed stiffness S-versus-m data from bending beam rheometer tests corresponding to an S value of 300 MPa was found to be 0.27.
