Preparation and Properties of Anti-Light Oxygen Aging Modified Asphalt
JIA Jian
WANG Yanmin
LIU Zhimin
WANG Wei
Abstract：The asphalt of 70# road asphalt used as base asphalt, salicylic acid phenyl ester and 2-hydroxyl-4-methoxy two benzophenone are used as UV absorbents to prepare the modified asphalt with the different ultraviolet absorbent content. The UV-aging test of asphalt material is carried out by self-made artificial ultraviolet light source environment box. According to the change of softening point, penetration and ductility before and after aging of asphalt, this paper makes a comparative analysis of the influence of the mixture of the different dosage of ultraviolet absorbent salicylic acid phenyl ester, 2-hydroxyl-4-methoxy benzophenone, and the mixed use of the two on the ability of asphalt to resist light oxygen aging. The test results show that the mixture of salicylic acid phenyl ester and 2-hydroxy-methoxy-methyl ketone can improve the high temperature stability of asphalt, reduce its low-temperature performance slightly; both salicylic acid phenyl ester and 2-hydroxy-methoxy-methyl ketone can improve the anti-UV aging ability of asphalt; the modified asphalt prepared by salicylic acid phenyl ester and 2-hydroxyl-methoxy-methyl ketone is superior to the UV-aging ability of modified bitumen with a single water mixture or 2-hydroxy-hydroxyl-methoxy-methyl ketone.
Keywords：light oxggen agingUV-absorbentmodified asphaltanti-light aging performance
Publication Date：2018-01-01
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 66-73 )