Research On Preparation Of SBS/Crumb Rubber Powder Compound Modified High-performance Asphalt

With the improvement of people’s living standards, car ownership increased year by year;thereby the dispose of scrap tires created by increased car ownership has become a thorny issue.In addition, the rapid development of China’s high-grade high road has made asphalt unable tomeet the rising demands. If we can focus on wasted tires and apply the technique to highwayconstruction, it will not only fully utilize the waste, but also improve road performance of asphalt,which is a very meaningful research topic.As for the current modified asphalt, SBS modified asphalt has the best overallperformance among all. But compared to the scrap tire rubber powder, SBS costs more, whichlimits the scope of its application. Scrap tire processing into certain fineness of powder costs less,but it has only relatively limited role on the modification of asphalt, which is unable to serve thehigh demands of road construction. Therefore, in order to take full advantage of the twomodifiers, this paper aims to study how to prepare the scrap tire rubber powder/SBS modifiedbitumen compound.The thesis studies the impact of the macro-preparation process, mesh powder, powderdosage and dosage of SBS asphalt penetration, softening point, low temperature ductility andelasticity recovery. Using microscopic scanning electron microscopy and thermal analysismethods, it also analyzes possible modification mechanism and the role of solvents andstabilizers added to the composite modified asphalt. Through constant adjustment formulaexperiments on the preparation of crumb rubber/SBS modified asphalt performance compositeto achieve the targets set at the same time the project can take care of the economy.