Liu Xing, Wu Shaopeng, Liu Gang, Li Liping
State Key laboratory of Silicate Materials of Architectures, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel). 2015 Jul 3;8(7):4022-4033. doi: 10.3390/ma8074022.
Layered double hydroxides (LDHs) are an ultraviolet-light (UV) resistant material. In this study, LDHs were used to modify bitumen. The optical and UV aging properties of LDHs modified bitumen were investigated. Firstly, the thin films of bitumen, with and without LDHs, were prepared. By using the UV-Vis spectrophotometer, absorbance, reflectance, and transmittance of bituminous thin film were evaluated. The morphology of LDHs-modified bitumen was observed by using fluorescence microscopy (FM). Finally, the aging resistance of LDH-modified bitumen was investigated by using the UV-aging oven. Results indicated that the LDHs, especially with 5 wt % in the bitumen, can effectively absorb and reflect the UV light and improve the UV-aging resistance of bitumen. This implied that the addition of LDHs into bitumen had the potential to prolong the service life of asphalt pavement.
层状双氢氧化物（LDHs）是一种抗紫外线（UV）材料。在本研究中，LDHs被用于改性沥青。研究了LDHs改性沥青的光学和紫外线老化性能。首先，制备了含和不含LDHs的沥青薄膜。通过使用紫外可见分光光度计，评估了沥青薄膜的吸光度、反射率和透射率。使用荧光显微镜（FM）观察了LDHs改性沥青的形态。最后，使用紫外线老化箱研究了LDH改性沥青的抗老化性能。结果表明，LDHs，尤其是在沥青中含量为5 wt%时，能够有效吸收和反射紫外线，并提高沥青的抗紫外线老化性能。这意味着向沥青中添加LDHs有可能延长沥青路面的使用寿命。
