Study on the Effect of Ultraviolet Absorber UV-531 on the Performance of SBS-Modified Asphalt

Abstract

Asphalt pavements at high altitudes are susceptible to aging and disease under prolonged action of UV light. To improve their anti-ultraviolet aging performance, UV-531/SBS-modified asphalts with UV-531 dopings of 0.4%, 0.7%, and 1.0% were prepared by the high-speed shear method, and the effect of UV-531 on the conventional performance of SBS-modified asphalt before aging was studied by needle penetration, softening point and 5 °C ductility tests. The high- and low-temperature rheological properties of UV-531/SBS-modified asphalt before and after aging were also analyzed by high temperature dynamic shear rheology test and low-temperature glass transition temperature test. Finally, the effect of UV-531 on the anti-aging performance of SBS-modified asphalt was evaluated by three methods, including rutting factor ratio, viscosity aging index, and infrared spectroscopy. The results show that with the increase of UV-531 doping, the needle penetration and 5 °C ductility show an increasing trend, but the effect on the softening point is small. The high temperature stability of SBS-modified asphalt is not much affected by the addition of UV-531, and the low-temperature stability is improved, and when 0.7% UV absorber is added, SBS-modified asphalt shows better low-temperature performance. The results of all three evaluation methods show that the addition of UV-531 significantly improved the anti-UV aging performance of SBS-modified asphalt, with the amount of 0.7% providing the asphalt with the best anti-UV aging performance. The results of the study can provide an important reference for improving the anti-ultraviolet aging performance of SBS-modified asphalt.

Experimental study on the effect of Coumarone resin on the performance of SBS-modified asphalt

“…Styrene-butadiene-styrene (SBS) copolymers are commonly used to enhance the performance of asphalt due to their superior high-temperature, low-temperature, and aging resistance properties [4][5][6]. When SBS and asphalt are mixed together, due to the relatively large differences in their respective structures and compositions, there are bound to be compatibility problems.…”

Evaluation of properties and aging resistance of epoxy asphalt composite modified by ultraviolet absorber

“…Recent works reported that the UV‐531 absorber could improve the physical properties of both base asphalt and SBS‐modified asphalt, particularly their low‐temperature performance. The addition of such absorber significantly enhances the photo‐stability of asphalt materials 25–29 . Feng et al revealed that Tinuvin 770 and UV‐531 absorber exhibited improved UV aging inhibition over bumetrizole 30,31 .…”

“…The addition of such absorber significantly enhances the photo-stability of asphalt materials. [25][26][27][28][29] Feng et al revealed that Tinuvin 770 and UV-531 absorber exhibited improved UV aging inhibition over bumetrizole. 30,31 Also, UV-531 absorber is often used in combination with other anti-aging agents to enhance its effectiveness in protecting asphalt materials from photodegradation.…”

Study on Aging Mechanism and High-Temperature Rheological Properties of Low-Grade Hard Asphalt

“…High-temperature and high-altitude regions are characterized by aridity, intense heat, and high levels of ultraviolet radiation. These conditions contribute to severe rutting issues in asphalt pavements within such areas [ 1 , 2 ]. To address the anti-rutting requirements of pavements, high-content styrene-butadiene-styrene (SBS)-modified asphalt is commonly employed, or anti-rutting agents are added for asphalt modification.…”