Effect of Layered Double Hydroxides (LDHs) on Aging Properties of Bitumen
Effect of Layered Double Hydroxides (LDHs) on Aging Properties of Bitumen
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DOI：
10.1520/jte20120050
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发表时间：
2012-09-01
影响因子：
1.2
通讯作者：
Yu, Jianying
中科院分区：
文献类型：
--
作者：
Huang, Yongfang;Feng, Zhengang;Yu, Jianying
采用熔融共混法制备了层状双氢氧化物改性沥青。研究了LDHs对沥青物理性能和老化性能的影响。采用傅里叶变换红外光谱（FTIR）分析方法，考察了LDHs对沥青薄膜烘箱试验（TFOT）和紫外辐射试验（UV）前后化学结构的影响。结果表明：随着LDH含量的增加，沥青的软化点和粘度逐渐增大，而沥青的延性和渗透性降低；LDH可以提高沥青抗TFOT老化和抗UV老化的能力，特别是当LDH含量大于3wt . %时。在FTIR分析中，可以看到LDHs可以抑制沥青在TFOT和UV老化过程中的氧化，导致羰基和二氧化硫含量低于原始沥青。
Layered double hydroxide (LDH) modified bitumen was prepared via melt blending. The effects of LDHs on the physical properties and aging properties of bitumen were studied. The influence of LDHs on the chemical structure of bitumen before and after a thin film oven test (TFOT) and an ultraviolet (UV) radiation test was evaluated by means of Fourier transform infrared (FTIR) spectroscopy analysis. The results show that with increasing LDH content, the softening point and viscosity of bitumen gradually increase, whereas the ductility and penetration of bitumen decrease. LDHs can improve the ability of bitumen to resist TFOT aging and UV aging, especially when the LDH content is more than 3 wt. %. In the FTIR analysis, it is seen that LDHs can inhibit the oxidation of bitumen during TFOT and UV aging, resulting in smaller carbonyl and sulphoxide contents than in the pristine bitumen.