SBS胶乳改性乳化沥青流变机制及黏附性能OA

[Purposes]SBS modified emulsified asphalt has excellent performance,but it is diffi-cult to emulsify SBS modified asphalt in its preparation process because of its high viscosity.[Meth-ods]In this paper,SBS latex modified emulsified asphalt(SBS-LMEA)was prepared by first emulsi-fying SBS into SBS latex and then adding the SBS Latex it into emulsified asphalt.By comparing SBS-LMEA with SBS modified emulsified asphalt(SBS-MEA)with fluorescence microscopy and Fourier infrared spectroscopy,the effects of additives in SBS latex on the microscopic mechanism of modified emulsified asphalt were investigated.The rheological mechanism and adhesion properties of SBS-LMEA with different SBS contents were evaluated thougth frequency scanning,MSCR,active adhesion test,and pull-out test.[Results]The results show that the microstructure and functional groups of SBS-LMEA and SBS-MEA are basically the same,and both belong to physical modifica-tions.The additives in SBS latex have no effect on the microstructure and functional groups of modi-fied emulsified asphalt.Compared with those of pure emulsified asphalt,the high temperature defor-mation resistance and low temperature deformation recovery ability of SBS-LMEA with SBS content of 8%are greatly improved.With the increase of SBS content,the irrecoverable deformation de-creases,the elastic recovery ability increases,Jnr decreases from 44 to 0.18 kPa-1,R increases from 14%to 93%,the resistance to spalling increases from 10.7%to 50.9%,and the drawing strength in-creases from 0.54 to 1.54 MPa.