Effect of Layered Double Hydroxides on Ultraviolet Aging Resistance of SBS Modified Bitumen Membrane

徐松¹，余剑英¹，XUE Lihui²，SUN Yubin²，XIE Dong³

1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology2. Center for Materials Research and Analysis, Wuhan University of Technology3. School of Materials Science and Engineering,Wuhan University of Technology

摘 要：Layered double hydroxides（LDHs）/styrene-butadiene-styrene（SBS） copolymer modified bitumen was prepared by melt blending. The effect of LDHs on the ultraviolet（UV） aging behavior of SBS modifi ed bitumen was investigated. The changes of chemical structures of modifi ed bitumen before and after UV aging were characterized by Fourier transform infrared spectroscopy（FTIR）. The results show that LDHs obviously reduce the variation of softening point and low temperature fl exibility of SBS modifi ed bitumen under different UV radiation intensities, which indicates that the UV aging resistance performance of SBS modifi ed bitumen is improved effectively by LDHs. Compared with SBS modifi ed bitumen, the changes of carbonyl, sulfoxide and butadienyl of LDHs/SBS modified bitumen decrease significantly after UV aging according to FTIR analysis, demonstrating that the oxidation and degradation reactions of SBS modifi ed bitumen were restrained effectively by adding LDHs.

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