Application And Selection Of Modified Bitumen Aiming At Asphalt Pavement Of The High Temperature And Raininess Area

With the volume of transportation is bigger, and axial load is heavier, the higher quality is requested for pavement. But present quality of base asphalt can't suit for it anymore. To improve the freeway function, modified asphalt is being used extensivelly to improve asphalt function and strengthen the capability of resisting rut and deformation.The weather of Jiangxi province changes with seasons obviously, the annual temperature is about 27-19.7C, the lowest temperature is in January, with lunar temperature being 3.7-8.6C, and highest one is in summer, with extremely temperature over 40C. sometime the pavement temperature is as high as 70-80C. meanwhile, lots of rain, rich ground-water,complicated hydrology and geology are features at the geology and weather of Jiangxi too. So water and high temperature in summer are the main factors which lead to pavement's early damage in Jiangxi province, and the emphasis took into account is the capability to resiste deformation under high temperature, but not to anti-crack under low temperature.Modified asphalt performance for the reasonable evaluation, aim at the geography, weather characteristics of JiangXi province, we are certain to modified asphalt to choose an index sign for: Reology under high temperature , Anti-ageing performance. The research of experimenting chooses to use three kinds of base asphalts (QP 70~#, SK 70~#, ZH 70~#), different SBS( YH 791, YH 898 , LCY 411) to be started experiment with different amount of dope to change by investigating SBS modified asphalt index sign variety, the research changes improvement degree and SBS of asphalt various function in modified asphalt, the relation of additive, the choice matches JiangXi province to modified asphalt index sign;Analyze SBS to modified asphalt Reology under high temperature and Anti-ageing performance, research the operation method of modified asphalt; research the relation of modified asphalt index sign, the choice matches the index sign scope that the JiangXi province modified asphalt, putting forward JiangXi province SBS to modified asphalt in the applied request in the road and the index sign scope.Combine JinFu freeway wengsa section engineering, according to the suggestion of the SBS modified asphalt index sign request, drawing up blessing superhighway house in JinFu freeway wengsa section a top a layer to spread to build to modified...