This study correlates density of bituminous pavements after construction with performance as evidenced by progressive densification and depth of longitudinal grooves or ruts caused by traffic up to 36 months after construction. Test sections, consisting of bituminous binder course only and a system of binder and wearing course were constructed on flexible and rigid bases. The test sections were compacted to various initial densities by varying the compactive effort, i.e., tire contact pressures and number of passes of a pneumatic roller. Periodic surveys made of the pavement density show that regardless of the initial density the rate of density increase is greatest during the first six months the pavement is open to traffic and then tends to taper off and stabilize. It was also found that the least amount of progressive densification took place in test sections that had high initial densities. Measurements of depth of rutting in the test sections were made after 36 months of traffic. In general, the greatest amount of wheel path rutting was noted in sections compacted at low tire contact pressures and the least amount when compacted at high contact pressures and optimum number of passes of the roller. The majority of the test sections, after being opened to traffic for 36 months, have equalled or exceeded the laboratory design density as determined by the 75 blow Marshall procedure, however, no section has shown evidence of flushing. (Author)


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    Titel :

    Compaction of Asphaltic Concrete Pavement with High Intensity Pneumatic Roller. Part II. Densification Due to Traffic


    Beteiligte:
    S. C. Shah (Autor:in)

    Erscheinungsdatum :

    1965


    Format / Umfang :

    29 pages


    Medientyp :

    Report


    Format :

    Keine Angabe


    Sprache :

    Englisch