The effect of permeability on the compaction of asphalt concrete pavements

Abstract

The permeability property of asphalt concrete pavements is insufficiently studied, however, recent studies in the field of road construction prove that the degree of manifestation of this property significantly affects the operational durability of road structures. The study carried out by the authors demonstrates a direct relationship between the content of air voids in the structure of the material and the degree of its compaction. A significant content of air pores leads to an increase in permeability, which catalyzes the processes of premature aging of bitumen binders, the formation of cracks and adhesive damage. The article analyzes the influence of technological parameters of compaction on the formation of the internal structure of asphalt concrete, and estimates the correlation between the relative density of the material and its mechanical characteristics. The results of laboratory tests are presented, confirming that the choice of the sealing process helps to reduce permeability and increase the track resistance of coatings. Quantitative relationships have been established between the content of air voids and indicators of crack resistance, frost resistance, and the modulus of stiffness of the material.