Study on Preparation and Microscopic Characteristics of Star-line Blended SBS Modified Asphalt
In order to solve the problem that the existing linear SBS modified asphalt modifier has high content,but the stability of asphalt performance is poor,based on the principle of molecular self-assembly,with the help of inhibitor,the preparation method of star-line blended SBS modified asphalt was studied,and the feasibility of replacing part of linear SBS with star-shaped SBS to reduce the content of SBS was evaluated.The mechanical properties were determined by three basic indexes,the viscoelastic properties were determined by dynamic shear rheometer,and the infrared spectroscopy and fluorescence microscopy were analyzed.The final results show thatthe three indexes of star-line blended modified asphalt with 0.2%and 3.3%modifier are equivalent to those of pure line 3.8%SBS modified asphalt,which can reduce the content of 0.5%SBS.The high temperature performance of star-line blended SBS modified asphalt is better,the reaction is more complete,and the network structure is more perfect.
SBS modified asphaltstar-line blendedpreparation processrheological propertiesmicroscopic characteristics
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