Abstract:

To investigate the micro disperse state of SBS(Styrene-butadience-styrene block polymer)in modified asphalt,the fluorescent optical microscope was used to observe the micro disperse state of SBS-modified asphalt.It is found that,during the mixing of SBS and asphalt,the disperse state and the microstructure of SBS undergo a sedes of changes,and that the qualification of the modified asphalt varies accordingly,Moreover,with the different disperse states of SBS in the modified asphalt,different modifying effects will be obtained.According to the rela-tionship between the microstructure and the macro-performance,a simple and convenient method for the quality control of modified asphalt can be obtained.

Key words: modified asphalt, microscopic observation, disperse state, perform ance