The effects of increased truck loads and higher tire pressures on performance of flexible pavements were investigated in the project. Volume 1 report presents the research performed and the useful results obtained. Tire pressure studies were performed using both in-field measurements and theoretical simulations of the effects of tire pressures on pavements. Higher tire pressures were found, in general, to reduce pavement life. A new mechanistic damage model was developed to allow the evaluation of the effects of loads and tire pressures on pavements. A new set of equivalence factors were developed using the damage models. The resulting equivalence factors were incorporated into a computer program to calculate 18-kip equivalent single axle loads. The programs also have the capability to use the AASHTO equivalence factors for the calculation as a basis for comparison. These programs were developed for both static truck weight measurements and weigh-in-motion measurements. A mechanistic pavement design program was also develped using the damage models in order to generate pavement designs that are compatible with the new mechanistic load equivalence factors.


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    Title :

    Evaluation of Increased Pavement Loading. Volume 1. Research Results and Findings


    Contributors:
    S. W. Hudson (author) / S. B. Seeds (author) / F. N. Finn (author) / R. F. Carmichael (author)

    Publication date :

    1988


    Size :

    226 pages


    Type of media :

    Report


    Type of material :

    No indication


    Language :

    English





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