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

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.

Cultural mode and organo-mineral amendment effect on growth and yield of rice (Oryza sativa L.) and soil chemical properties in sulfated acid soils of Basse-Casamance

“…However, higher soil salinity (11.2 dS m −1 ) in the surface soil layer of acid sulphate soils of Ganges Delta was also reported [ 4 ]. Soil salinization in Basse Casamance occurs through the capillary rise of the saline water table in the profiles [ 44 ]. But authors found that the salinity gradient was vertically downwards and Subsoil salinity was usually much lower than topsoil salinity [ 45 , 46 ].…”

Assessing the Feasibility, Usability, and Durability of Recycled Construction and Demolition Waste in Road Construction in Morocco

“…The flattening coefficient of the CDWs aggregates was approximately 19%, which classified it as Fl20 according to EN 13242 [48]. Usually, an aggregate favorable shape (spherical, cubic or nodular) has a flattening coefficient generally between 5% and 20% [62,63]. Particles that are too elongated or too flat tend to shatter in their small dimension during compaction [17].…”

“…3. A good angularity of the aggregates increases the inter-granular friction that gives the track a very high degree of elasticity and strength [62,63].…”