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Impact of Intrinsic Properties of Aggregate and Volumetric Properties of Hot Mixture Asphalt (HMA) in the Influence of the Resistance to Rutting

Several studies show that properties of 
Hot Mixture Asphalt (HMA) mix design materials, aggregate gradation and 
volumetric properties had an influence on their resistance to rutting. However, 
these properties do not impact in the same way this performance. For a given 
aggregate type, an infinity aggregate gradation type can be 
observed, and for each type of HMA several types of bituminous binder can be 
used. This article aims to measure the evolution of resistance to rutting 
according to the three main classes of National Cooperative Highway Research 
Program (NCHRP) aggregate gradation (dense-graded, fine-graded and 
coarse-graded). To this end, a study was conducted on the 
measurement of rutting resistance for eight bituminous mixtures manufactured with 
two bitumen types and two 
types of manufacturing aggregates. The results showed that there is a priority 
order of these different parameters on the influence of the resistance to 
rutting. This highlights a competition between the properties of aggregate and 
type of granular skeleton. Indeed, for the same type of aggregate, asphalt 
binder type first impacts resistance to rutting of the HMA followed by aggregate gradation, volumetric 
properties of the mix and finally by the angularity of the aggregates. However, this order cannot be fixed 
and can depend of the intensity of each parameter.