Mechanistic modeling of Saskatchewan specific pavement studies-9A asphalt concrete pavements /
This research sought to investigate alternative methods for characterizing the thermomechanical constitutive behavior of asphalt concrete mixes necessary for material specifications and mechanistic road response modeling. Seven Specific Pavement Studies-9A (SPS-9A) asphalt concrete mixes (two Marsha...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
1999.
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| Subjects: | |
| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=733669621&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | This research sought to investigate alternative methods for characterizing the thermomechanical constitutive behavior of asphalt concrete mixes necessary for material specifications and mechanistic road response modeling. Seven Specific Pavement Studies-9A (SPS-9A) asphalt concrete mixes (two Marshall and five Superpave[]) were characterized with respect to physical and volumetric properties, Marshall stability, Marshall flow, Hveem stability, unconfined compressive strength, SHRP Level III shear properties, and triaxial compression-extension frequency sweep properties. This research determined that traditional phenomenological asphalt concrete characterization methods distinguished some significant differences between the Radisson SPS-9A asphalt concrete mixes, however, they did not provide material constitutive relations necessary for mechanistic road response modeling. The SHRP Level III shear tester also distinguished some significant differences between the Radisson SPS-9A asphalt concrete mixes and can provide material constitutive relations necessary for mechanistic road response modeling. However, the SHRP shear tester is expensive to own and operate, and the SHRP Level III shear testing protocols were found to be time consuming and impractical for use by most public road authorities, road consultants, and road contractors. In addition, the SHRP shear tester produced higher variability in material property measurements across repeat samples when compared to the other test methods investigated in this research. The rapid triaxial tester determined the most significant difference in the elastic and viscoelastic constitutive properties of the Radisson SPS-9A asphalt concrete mixes, across test temperatures, stress states, and load rates with a lower coefficient of variation than the SHRP Level III shear tester. The rapid triaxial tester was found to be efficient and user friendly, and a complimentary mechanistic testing apparatus to the SHRP gyratory compactor. The rapid triaxial characterization results were used as material constitutive relations for layered linear elastic and layered linear viscoelastic road response modeling of the Radisson SPS-9A test sections. |
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| Item Description: | Vita. "Major Subject: Civil Engineering". |
| Physical Description: | 2 volumes : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 249-261). |