Road Rater deflection data were used to estimate the in-place subgrade strength and the in-place structural capacity of existing pavements. Pavement behavior can be expressed in terms of a reduced thickness of "reference" quality paving materials or as a reduced modulus of elasticity for the constructed thickness of asphaltic concrete. Mathematical relationships were developed making it possible to "program" the evaluation procedure (in modular form) for use with small hand calculators or minicomputers.
The pavement evaluation method has been successfully implemented in making recommendations for overlay designs for several pavement sections. Road Rater deflection data were used to estimate the in-place subgrade strength and the structural capacity of the existing pavement. Pavement rutting and roughness were also considered in determining final overlay thickness recommendations.
Digital Object Identifier
Sharpe, Gary W.; Southgate, Herbert F.; and Deen, Robert C., "Implementation of Road Rater Deflection Testing for Pavement Evaluation and Overlay Design" (1982). Kentucky Transportation Center Research Report. 773.