TITLE:
Impact of Intrinsic Properties of Aggregate and Volumetric Properties of Hot Mixture Asphalt (HMA) in the Influence of the Resistance to Rutting
AUTHORS:
Mouhamed Lamine Chérif Aidara, Makhaly Ba, Alan Carter
KEYWORDS:
Aggregate Gradation, HMA, Rutting, Basalt, Quartzite
JOURNAL NAME:
Open Journal of Civil Engineering,
Vol.10 No.3,
July
23,
2020
ABSTRACT: 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.