Performance Study of Typical Virginia Pavements

About the report:

The performance of in-service typical Virginia flexible and rigid pavements in all areas of the state has been under evaluation since 1954. The objectives are to provide a ready reference for designers and field engineers and to provide background information for design improvement. Periodic deflection and roughness tests have been conducted along with field inspections. The records maintained on each pavement reflect condition, traffic, construction costs, and major repairs. Among the major findings of the study are: 1. Cement stabilized subgrades under recently constructed flexible pavements have virtually eliminated rutting and other major distortions; 2. the estimated cumulative number of 18 kip equivalent axle loads sustained by a pavement up to a fixed degree of cracking is directly related to a parameter used to define the shape of the dynaflect deflection basin; 3. terminal PSI as defined from the AASHO Road Test is too insensitive for use in the evaluation of flexible pavement performance in Virginia; 4. and the use of too long a joint spacing and of metal joint forming inserts has impaired the performance of rigid pavements in Virginia.

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