Raveling is a commonly observed functional distress on the bituminous pavement surface. A monthly pavement evaluation was conducted on one of the major district roads (MDR) in Telangana State, India. The study was conducted for thirty-six months. The field cores were taken from the Bituminous Concrete (BC) surface and were tested in the laboratory for further analysis. The bulk specific gravity (Gmb) of the field core samples was measured, and the values ranged from 91.1 to 92.9% of maximum specific gravity (Gmm) in the first month after construction, and the binder content was 5.4%. After three years of construction, the field density values ranged from 94.1 to 95.3% due to traffic movement and the binder content was reduced to 4.5% due to the raveling of fine aggregate. The BC cores showed variation in the gradation, indicating the missing fine aggregate. The binder properties of the extracted bitumen were equal to the bitumen aged using the pressure ageing vessel (PAV) by the end of the fourth year after construction. The field cores were sliced into two parts, a top slice and a bottom slice, and the bulk density was measured. Bitumen was extracted both from the top and bottom slices to find the binder content. The extracted bitumen was tested for non-recoverable creep compliance (Jnr) and binder fatigue (Nf) to assess the ageing gradient. The top slice of the core had higher Gmb, lower Jnr and lesser Nf than the bottom slice. The variations in slices were due to a higher rate of oxidative ageing of the top slice compared to the bottom. Also, the binder content was lower in the top slice due to raveling on the BC surface. Therefore, it was concluded that compacting the BC surface to 94% of Gmm instead of 92% reduces binder ageing and extends the life of the BC surface.


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    Title :

    Bitumen Ageing and Its Impact on Surface Raveling


    Additional title:

    Transp. in Dev. Econ.




    Publication date :

    2025-04-01




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




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