Evaluation of Experimental Flexible Pavements: Construction of Altavista Bypass Experimental Pavement

Report No: 73-R56

Published in 1974

About the report:

Deflection tests conducted during the construction and shortly after the completion of a large experimental pavement project are reported. Four different pavement designs, as follows, are compared: 1. 6-inch cement stabilized subgrade, 6-inch crushed stone base, 71/2-inch bituminous concrete. 2. 6-inch cement stabilized subgrade, 91/2-inch bituminous concrete. 3. 4-inch cement stabilized crushed stone subbase, 6-inch crushed stone base, 7 1/2-inch bituminous concrete. 4. 6-inch cement stabilized subgrade, 4-inch cement stabilized crushed stone base, 5 1/2-inch bituminous concrete. The results of these early tests support the following conclusions. 1. Pavements having equivalent design parameters are not necessarily equivalent in either early structural strength or in construction costs. 2. Very early deflection tests are not good indicators of the ultimate strength characteristics of pavements having cement stabilized layers. 3. Highly resilient soils must be stabilized to achieve a good working platform and to assure the early development of design strength. 4. Design No. 4, above, develops the design structural strength more rapidly and at a lower cost than the other three designs.

Disclaimer Statement:The contents of this report reflect the views of the author(s), who is responsible for the facts and the accuracy of the data presented herein. The contents do not necessarily reflect the official views or policies of the Virginia Department of Transportation, the Commonwealth Transportation Board, or the Federal Highway Administration. This report does not constitute a standard, specification, or regulation. Any inclusion of manufacturer names, trade names, or trademarks is for identification purposes only and is not to be considered an endorsement.

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Kenneth H. McGhee

Last updated: February 7, 2024

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