The performance of the original portland cement concrete pavement sections from the AASHO Test Road has been studied. Findings indicate that the original AASHO performance equation for rigid pavements predicted a greater service life expectation for the thicker pavement slabs than was being observed. To agree with the observed performance, a modified performance equation that slightly increased the performance expectation for the pavement sections 8.0 in. (203 mm) thick and reduced the expectation for the pavement sections 9.5 in. (241 mm), 11.0 in. (279 mm) and 12.5 in. (318 mm) thick was developed. Stabilized aggregate subbases, especially the BAM, improved rigid pavement performance. On the BAM subbase, rigid pavement sections developed fewer major cracks, and pavements with joints spaced at 100 ft (30.5 m) had the most uniform winter joint opening. Dowel bar corrosion was the primary cause of joint lockup in the rigid pavement test sections. Stabilized aggregate mixtures, used as the base course in flexible pavements, had variable effects on pavement behavior. On the BAM base, the flexible pavements were smoothest. On the CAM base, transverse cracks formed which 'tented' in freezing weather. On the granular base, area cracking was the primary form of pavement distress and the deepest ruts formed. Rut formation was reduced on the rigid base and the least rutting developed where asbestos fiber filler was used in lieu of part of the filler.


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    Titel :

    Performance of Pavement Test Sections in the Rehabilitated AASHO Test Road


    Beteiligte:
    R. J. Little (Autor:in) / L. J. McKenzie (Autor:in)

    Erscheinungsdatum :

    1977


    Format / Umfang :

    99 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch






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