Rheological properties for aged bitumen containing ultraviolate light resistant materials

Investigation of the ultraviolet aging resistance of organic layered double hydroxides modified bitumen

“…Some UV absorbers can improve the UV aging performance of bitumen, but the effects largely depend on the type of UV absorber and the nature of bitumen [18,19]. Recently, layered double hydroxides (LDHs), also known as hydrotalcite-like compounds with host-guest supramolecular structures, were also used as UV screening agent of bitumen, and the results showed that enhanced UV aging resistance of bitumen could be obtained by adding LDHs, the main reason is that the multi-layered structure of LDHs can physically reflect the UV light by the interface of metal hydroxide sheets, which can protect bitumen from destruction of high-energy UV [20][21][22]. However, due to the high charge density and strong hydrophilicity of inorganic layers of LDHs, strong attractive forces exist between the LDHs particles dispersed in bitumen matrix, which leads to poor compatibility between LDHs and bitumen, and further resulting in difficulty in obtaining homogeneous and stable dispersion of bitumen/LDHs composite [23].…”

Inhibiting effect of Layered Double Hydroxides on the emissions of volatile organic compounds from bituminous materials

“…Additives were proposed to reduce the VOC amount (Cui et al, 2014a(Cui et al, , 2014b(Cui et al, , 2015Zhang et al, 2010). Layered Double Hydroxides (LDHs) were reported as an effective UV resistant additive to modify bituminous materials with its special synthesized MgeAl double layer structures (Pang et al, 2014;Wu et al, 2012). The effect of LDHs on UV resistance has two sides; on the one hand, the inorganic layer sheets are physically resistant to UV.…”

Effect of ultraviolet aging on rheological properties of organic intercalated layered double hydroxides modified asphalt

“…11.046 0950-0618/Ó 2014 Elsevier Ltd. All rights reserved. ides (LDHs) are also employed as UV screening agent of asphalt, and the UV aging resistance of asphalt could indeed be improved due to the introduction of LDHs [9][10][11].…”