Effect of Ultraviolet Aging on Rheology and Chemistry of LDH-Modified Bitumen
AbstractLayered double hydroxides (LDHs) are an ultravioletlight (UV)-resistant material. In this study, two types of LDHs (Mg-Al-LDHs and Zn-Al-LDHs) were applied to modify bitumen by melt-blending. The effect of ultraviolet aging on the rheology and chemistry of LDH-modified bitumen was studied by means of dynamic shear rheometer (DSR), thin-layer chromatography with flame ionization detection (TLC-FID), Fourier transform infrared spectroscopy (FTIR), and Ultraviolet-Visible (UV-Vis) spectrophotometry to reveal the mechanisms of action for LDHs and bitumen. The results showed that within the UV spectra (220–400 nm), the reflectance of Zn-Al-LDHs was larger than that of Mg-Al-LDHs. These two LDHs have different influences on the performance of bitumen. Mg-Al-LDHs had a more obvious influence on the physical and dynamic rheological properties of bitumen than Zn-Al-LDHs. Zn-Al-LDHs improved the UV-aging resistance of bitumen more. The reason can be that the reflectance of the Zn-Al-LDHs to the UV light is larger than that of the Mg-Al-LDHs. The Zn-Al-LDH-modified bitumen had more potential to improve the UV-aging resistance during the service life of asphalt pavement. View Full-Text
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Liu, X.; Wu, S.; Liu, G.; Li, L. Effect of Ultraviolet Aging on Rheology and Chemistry of LDH-Modified Bitumen. Materials 2015, 8, 5238-5249.
Liu X, Wu S, Liu G, Li L. Effect of Ultraviolet Aging on Rheology and Chemistry of LDH-Modified Bitumen. Materials. 2015; 8(8):5238-5249.Chicago/Turabian Style
Liu, Xing; Wu, Shaopeng; Liu, Gang; Li, Liping. 2015. "Effect of Ultraviolet Aging on Rheology and Chemistry of LDH-Modified Bitumen." Materials 8, no. 8: 5238-5249.