Study On Performance And Application Of Rubber Modified Asphalt

In this paper,the rubber modified asphalt technology was studied through laboratory experiments and theoretical analysis.The field emission scanning electron microscope was used to analyze the sample structure of the rubber asphalt cross section treated with liquid nitrogen.And on the basis of laboratory tests,the design methods and design indexes of mixed rubber asphalt and mixtures were analyzed and studied,and the rubber asphalt test section was laid according to the physical project.By optimizing the processing technology,the rubber powder / linear SBS YH-791 blend modified asphalt was prepared.Through the analysis of the three major indexes and elastic recovery tests of the prepared modified asphalt,the data performance changes verified the use of modified asphalt The rationality of performance shows that the scheme of rubber powder / SBS blend m odified asphalt is feasible;field emission scanning electron microscope XL-30 analysis shows that under the change of external temperature,rubber modified asphalt has a good interface phase between polymer and asphalt solvent.Capacitance promotes the formation of good high and low temperature properties of the composite modified asphalt,and the unique chemical cross-linking network structure of the rubber powder and the SBS physical cross-linking network structure cooperate and complement each other to optimize the modification of the polymer with excellent performance Asphalt;the swelling rate of the rubber powder / SBS blend system gradually increases with the increase of the swelling time;combined with the root cause of the road noise and the noise propagation process,the road surface is analyzed from the perspective of pore sound absorption and damping vibration reduction Noise reduction mechanism.In order to effectively reduce the number of tests,the orthogonal test design was selected,the orthogonal test factor level table was arranged,the formula of the test sample was designed,and the acoustic absorption coefficient test test was carried out using the impedance tube acoustic material measurement system,after a range analysis And variance analysis,determine the scientific and reasonable formula composition of rubber compound modified asphalt.According to the performance and microstructure characteristics of rubber asphalt,the design of the broken graded rubber asphalt mixture is determine d,and the different design methods are compared and analyzed.Finally,with the help of indoor fatigue test analysis,the fatigue benefit coefficient k is proposed to determine the asphalt of the rubber asphalt mixture ratio.Finally,in combination with engineering practice,a characteristic WRAC-13 graded rubber asphalt mixture technical system was formed.Finally,the construction technology of rubber asphalt pavement was summarized based on the physical engineering.