Development of structural layer coefficients for open graded asphalt emulsion mixes Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/44558h72b

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  • This paper describes the development of structural layer coefficients for open graded asphalt emulsion surfacing layers which can be used with the AASHO pavement design method, as modified by the U. S. Forest Service, Region 6. A field survey conducted to document the history, performance and material characteristics of in-service pavements is described and this information together with a survey of experienced users is used to determine the most important factors affecting the design thickness for the pavements. Traffic, base type, temperature and drainage design all are important to determine the pavement thickness. Two procedures used for the development of structural layer coefficients are described. The first procedure uses the information from the performance survey and the AASHO pavement design method to determine appropriate layer coefficients for three in-service roads. The second procedure is a fundamental approach based on layered elastic theory and using information from the field survey. This procedure is useful for the analysis of the pavement in the fully cured or partially cured state. Although a conservative approach was used for both procedures, the developed layer coefficients are greater than the values used in the current design procedure. This indicates that modification of the current values is appropriate. A tabled presentation of layer coefficients is proposed which considers only those factors found to be important for the determination of design thicknesses. The importance of good quality control and specifications is stressed and a listing of current specifications is included.
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  • description.provenance : Submitted by Kaylee Patterson (kdpscanner@gmail.com) on 2013-11-04T21:16:21Z No. of bitstreams: 1 HatchDavidRussell1977.pdf: 2338802 bytes, checksum: 3cc60fedcf6fb73bd74ee75173a8ec48 (MD5)
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  • description.provenance : Approved for entry into archive by Patricia Black(patricia.black@oregonstate.edu) on 2013-11-04T21:27:42Z (GMT) No. of bitstreams: 1 HatchDavidRussell1977.pdf: 2338802 bytes, checksum: 3cc60fedcf6fb73bd74ee75173a8ec48 (MD5)
  • description.provenance : Made available in DSpace on 2013-11-04T21:36:15Z (GMT). No. of bitstreams: 1 HatchDavidRussell1977.pdf: 2338802 bytes, checksum: 3cc60fedcf6fb73bd74ee75173a8ec48 (MD5) Previous issue date: 1977-09-20

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