Mineral-asphalt mixture, shear, lateral pressure, innovation

This article presents the results of shear tests on two-layer samples made of mineral-asphalt mixture, conducted in the IBDiM laboratory. The tests were carried out using an innovative apparatus that allows for the application of lateral pressure. The study examined samples both with and without a grid placed between the layers, with generated lateral pressures of 0.15 [MPa] and 0.3 [MPa]. Shear tests were performed at temperatures of: 10 [°C], 20 [°C], and 30 [°C]. In total, approximately 150 measurements were made, which were used to analyze the impact of grid reinforcement on the behavior of the interlayer interface in road pavement.As part of the work described in this article, performed in the IBDiM laboratory, shear tests were conducted on cylindrical two-layer mineral-asphalt pavement samples, with or without a grid between the layers.
The shear force was applied along and perpendicular (square mesh grid) to the grid fibers and at an angle of 45°. Furthermore, using the unique capabilities of the innovative apparatus, shear tests were conducted in three stress states: without lateral pressure, with lateral pressure equal to 50% of the maximum pressure generated by the device, i.e., 0.15 [MPa], and 100%, i.e., 0.3 [MPa]. Shear tests were performed at temperatures of: 10 [°C], 20 [°C], and 30 [°C]. In total, approximately 150 measurements were made as part of the research, which served for further analysis. It should be noted that road pavement reinforcement with a grid is increasingly being used on a large scale, cf. [1-6]. Reinforcement, depending on its location in the structure, can fulfill various functions, [3]. In the described work, the interface is analyzed, i.e. (…)

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