Low temperature properties of UV aged asphalts containing layered double hydroxides modifier

Abstract

background: In recent years, ultraviolet (UV) ageing of asphalt has attracted worldwide attention from researchers in the asphalt field. The UV radiation can result in the ageing of asphalt and thus influence its performance. So far, a variety of UV blocking materials have been investigated. Aim: In this paper, layered double hydroxides (LDHs) were introduced as the UV blocking materials into three different asphalts (S70, S90 and SBS modified asphalt). Methods: The low temperature properties, such as equivalent breaking point (EBP) and fatigue factor were tested and applied to estimate the UV blocking effects of LDHs on asphalts. Results: The experimental results demonstrated that LDHs could effectively reduce the ageing index of S70 and S90, and lower the degradation rate of SBS modifier.