The Effect of Zinc Doped Mg-Al LDHs on Ultraviolet Aging Resistance of Asphalt

Effects of zinc doped Mg-Al layered double hydroxides (Zn-Mg-Al LDHs) and Mg-Al LDHs on physical and ultraviolet (UV) aging properties of asphalt were evaluated by conventional physical properties, dynamic rheological characteristics and Fourier transform infrared (FTIR) spectroscopy. The results show that the introduction of LDHs improves the UV aging resistance of asphalt. By comparison, Zn-Mg-Al LDHs are superior to Mg-Al LDHs in improving aging performance of asphalt, which is due to the more outstanding UV shielding of Zn-Mg-Al LDHs in comparison with Mg-Al LDHs, leading to a beneficial effect in improving UV aging performance of asphalt.