Low Temperature Crack Resistance and Fatigue Properties of Asphalt Mixture with Pre-buried Heat Conduction Tube

In order to study the effect of geothermal heat transfer tube on the asphalt pavement performance, a heat transfer tube with a diameter of 8 mm was used, which was placed in an AC-16 hot mix asphalt mixture and crushed into a ruthenium plate test piece, using MTS-810 hydraulic servo test. The system evaluates the low temperature crack resistance and fatigue performance, and compares the performance with the asphalt mixture test piece without the heat conduction tube. The results show that after the heat transfer tube is buried, the failure strain of the asphalt mixture is reduced by 40.9%, and the repeated load of the three-point bending fatigue test is reduced by 53.9%. The low temperature crack resistance and fatigue performance are both larger. The degree is reduced.