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Open AccessArticle

Effect of Ultraviolet Aging on Rheology and Chemistry of LDH-Modified Bitumen

by , *,†, * and
State Key laboratory of Silicate Materials of Architectures, Wuhan University of Technology, Wuhan 430070, China
*
Authors to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editor: Jorge de Brito
Materials 2015, 8(8), 5238-5249; https://doi.org/10.3390/ma8085238
Received: 23 June 2015 / Revised: 1 August 2015 / Accepted: 4 August 2015 / Published: 12 August 2015
(This article belongs to the Section Structure Analysis and Characterization)
Layered 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
Keywords: LDHs; bitumen; aging; rheology; chemical compositions LDHs; bitumen; aging; rheology; chemical compositions
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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.

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