Evaluation of different porous asphalt gradations based on aggregate packing and stiffness parameters

Dynamic stiffness analysis of asphalt mixtures for nondestructive pavement performance assessment

“…The presence of internal pores, whether filled with air, water or ice, can lead to internal pavement degradation [1], [2] Asphalt pavement density is a crucial factor in assessing pavement quality, as variations in density and voids directly affect the performance of the asphalt mix during its service life, ultimately resulting in a reduction of pavement service life [3][4] [5] On the other hand, the durability of the asphalt mix and rutting behaviour are related to voids [6]. Increased voids can contribute to the formation of micro-cracks that develop into cracks and ultimately lead to permanent deformations [7]The optimum values of void contents and density are vital to ensure the durability of the pavement, as any deviation from these values from those stated in the working formula can have a detrimental effect on the structural and functional performance [3], [8], [9] The internal void content is a parameter that is designated during design and the density comes from the combined effect of all asphalt mix components. After production, these characteristics reflect initial construction parameters of the asphalt mixes [10], [11] Traditionally, in situ density assessment on roads has relied on destructive methods such as cylindrical coring, which are costly, time-consuming and generally limited for specific tests [12], [13] Non-destructive methods, including nuclear and non-nuclear density meters, have been used for quality control and acceptance of pavement quality.…”