Abstract
A 6-year research program has materially advanced the state of knowledge regarding frost heave and thaw weakening affecting roads and airfield pavements. The investigations included development of computer models, testing and data collection at field pavement test sites, and validation of the laboratory procedures and computer models aganist field data. Specific advances include development of a new freezing test to assess the frost susceptibility of soil; development and validation of a mathematical model serving to predict frost heave and thaw consolidation; development of a laboratory test procedure to determine the resilient modulus of frozen, thawed, and recovering granular soils; and conceptualizaion and testing of a technique for combining the frost heave and thaw consolidation model, the laboratory resilient modulus test, and a pavement response model to predict the nonlinear resilient modulus of granular soils and base course materials as variables in time and space.
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