Influence of Aggregate Gradation on Laboratory Rutting Performance of Hot-Mix Asphalt Mixtures

Distresses such as rutting in bituminous mixtures are known to be largely influenced by the aggregate skeleton. For a given optimum binder content, the challenge lies in making a choice of aggregate gradation which will lead to optimal performance in rutting and fatigue cracking. As a first step, the present work is focused on quantifying the rut resistance of two types of aggregate gradation. The two aggregate gradations are conventional dense gradation normally used in Indian highway and ternary blend derived from particle packing theory. Using these aggregate gradations, the bituminous concrete samples were prepared at two different air void level of 6  ± 0.5% and 4 ± 0.5%. The samples were subjected to rut wheel testing for 5000 numbers of passes at 50 °C. The rutting performance was captured in terms of rut depth, and it was found that the bituminous mixtures prepared using particle packing theory exhibited higher resistance to rutting when compared to the conventional dense-graded bituminous mixture.


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  • Accession Number: 01902429
  • Record Type: Publication
  • ISBN: 9789813290419
  • Files: TRIS
  • Created Date: Dec 16 2023 12:02PM