Evaluation of rubber asphalt properties under salt-temperature coupling action and its application potential in intelligent roads
LI Yongqiang
Abstract：To investigate the effect of salt temperature coupling on the performance of rubber powder modified asphalt,this article added 30 mesh waste tire rubber powder to SK90#matrix asphalt to prepare modified asphalt,and subjected the matrix asphalt and rubber powder modified asphalt to freeze-thaw cycles in water and sodium sulfate solution.Test the physical properties of two types of asphalt after different cycles through softening point test,cone penetration test,and force ductility test.The results showed that freeze-thaw cycles significantly exacerbated asphalt aging,manifested as an increase in softening point,a decrease in cone penetration,and further accelerated hardening process by salt content.The presence of rubber powder can improve the salt freezing resistance of asphalt to a certain extent.Under salt freezing conditions,the initial softening point increase of rubber modified asphalt is lower than that of matrix asphalt,and the high-temperature cone penetration stability is better,but its low-temperature ductility improvement is limited.
Keywords：rubber powderasphaltsalt contentfreeze-thaw
Publication Date：2025-10-25
Pages：4( 41-44 )