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- W642000498 abstract "In 1984 a 400B Road-Rater was purchased by the Maine Department of Transportation. One of the primary intentions for the use of this piece of equipment was to assist in the aid of designing structural overlays. As a result a project was established for the purpose of calibrating or correlating deflection data to the structural strength of roadways. The model used in this study is based upon the Chevron Elastic Theory and is heavily influenced by the Kentucky model. The local information was obtained from carefully selected projects representing 5 different specific types of subgrade. When the deflections were taken, temperature and time were also recorded. Immediately after this test was performed pavement samples were cut and saved for further testing. Field CBR values were then taken on top of the gravel and again on top of the subgrade. Water contents and granular samples of the material were also taken. After the basic model was established, it was refined so that features such as temperature could be added to correct the pavement modulus. Eventually the model was expanded to the extent that the AASHTO Structural Design Equation was included. To verify the model, several recently constructed projects were tested and the deflections data backcalculated to determine the effective pavement thickness." @default.
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- W642000498 date "1989-11-01" @default.
- W642000498 modified "2023-09-26" @default.
- W642000498 title "MATERIALS CHARACTERIZATIONS FOR DEVELOPMENT OF AN OVERLAY DESIGN PROCEDURE. FINAL REPORT" @default.
- W642000498 hasPublicationYear "1989" @default.
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