United States Department of Transportation
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Edition:Final Report; September, 1972 - August, 1977
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Abstract:Transverse cracking is a form of environmental deterioration that accounts for the expenditure of some twenty million dollars a year in maintenance in west Texas alone. This form of deterioration has not been predictable by previous mechanisms. A study of the environment in west Texas and installations of psychrometers beneath new construction show that freeze-thaw cycling is a major factor in west Texas and acts primarily in the base course. The base course undergoes volumetric contraction upon freezing that is an order of magnitude larger than that of the asphaltic concrete. This contraction is related to the specific surface area of the clay mineral portion of the material with models being developed for predictive purposes.
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