Study On SBS Modified Asphalt Technical Performance Evaluation And Quality Control

SBS modified asphalt, which has a good temperature susceptibility, high temperature resistance to deformation and low ductility, significantly improve the quality of pavement usage,has been more widely used on the highway in our country. The excellent performance of SBS modified asphalt from the SBS modifier,Therefore, the SBS content of modified asphalt will directly determine their performance. But in the course of using SBS modified asphalt,a complete and effective performance evaluation system of modified asphalt has not formed abroad, so does the effective analysis and test method of the SBS content in modified asphalt. Construction units can be lack of effective means of determination SBS content of the finished modified asphalt at the receiver.Therefore, how to properly evaluate and use SBS modified asphalt is an important issue we are facing to solve.This paper in-depth analysized the type and content of SBS modifier on the impact of performance of modified asphalt, to explore the performance of asphalt modified with the variation of SBS content, which provide the quality evaluation of SBS modified asphalt; The use of gray correlation systematic analysis the relationship between SBS content and performance indicators of modified asphalt, which identified the indicators closely associated with the SBS content and built the method of SBS content determination on performance evaluation of modified asphalt; By carrying out the high and low temperature performance evaluation of SBS modified asphalt, which Analysis a reasonable SBS content of modified asphalt; In order to more effectively evaluate SBS modified asphalt adhesive properties of the stone,by testing the Shear bond strength between the SBS modified asphalt and stone, and quantitative evaluation of the bonding effect between the different dosage SBS modified asphalt and the stone;By analysing infrared spectroscopy of matrix asphalt,SBS modifier and SBS modified asphalt, established the relationship between SBS content and absorbance of characteristic absorption peak of the double bond of polybutadiene in the wave number of 966.1cm-1, Which is used to detect the SBS content of the finished modified asphalt, The results show that the use of infrared spectroscopy can be accurately determining the SBS content of modified asphalt,to achieve effective monitoring the content of the modifier; The comparative analysis the relationship between the modifier distribution patterns in the different SBS content of modified asphalt and its performance Indicators by fluorescent microscope, thus the quality of SBS modified asphalt provide the basis for the initial control.