Rheological Properties of Composite Inorganic Micropowder Asphalt Mastic

Graphene Tourmaline Composite Micropowder (hereinafter referred to as GTCM) modified asphalt was prepared by the ball milling method. The effects of different temperatures and frequencies on high-temperature performance composite-modified were evaluated dynamic shear rheological test, viscoelastic properties under stresses analyzed. low-temperature GTCM-modified analyzed bending beam its mechanism Fourier transform infrared spectroscopy (FTIR) test. results show that temperature sensitivity anti-aging resistance are significantly higher than tourmaline-modified asphalt. improvement effect gradually increases with increase in graphene powder content, addition does not change complex modulus phase angle at appropriate more conducive matrix asphalt, which can improve rutting In same type, composite micropowder is better. GTCM-0.5, GTCM-1.0 GTCM-1.5-modified reach 12.95%, 10.12% 24.25%, respectively; range complicated due frequency changes. has good crack resistance. creep stiffness decreases load time types dosages, smaller mineral mastic. rate extension time, greater When 60 s, decreased 5.75%, 6.97% 13.73%, respectively, increased 1.37%, 2.52% 4.35%, respectively. After adding GTCM or tourmaline no new functional groups produced chemical reaction