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Abstract

In order to compare the performance difference among the composite stress absorption layer, SBS stress absorption layer, and glass grille stress absorption layer, the dynamic response law of the composite stress absorption layer was explored. In this paper, based on the composite stress absorption layer composed of glass grille + rubber-modified asphalt gravel sealing layer, the UTM-25 test system was employed to carry out inter-layer shear, inter-layer tension, low temperature bending, and four-point fatigue test. By laying test sections and sensors, strain information of the stress absorption layer under different conditions was collected. It was found that the bonding force of the composite stress absorption layer was 0.58 MPa; the internal friction angle was 12.84°; the tensile strength of the composite layer specimen was 0.48 MPa, and the maximum flexural strain was 3 936 με (−10 °C). According to the field test, the dynamic response model of vehicle speed (under standard axle load) was proposed. The test section was observed one year later, and no road disease was observed. The results show that the bonding properties, shear properties, low temperature bending properties, and fatigue properties of the composite stress absorption layer are better than those of the traditional stress absorption layer because of the locking effect of the glass grille and the bonding effect of the rubber-modified asphalt. The reinforcement effect of the glass grille makes the effect of the composite stress absorption layer more obvious in the low-speed climbing section.

Publication Date

11-24-2023

DOI

10.14048/j.issn.1671-2579.2023.05.005

First Page

27

Last Page

32

Submission Date

March 2025

Reference

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