Study On The Material Of Heat Insulation Pavement

With the improvement of living standards of urban residents, people get a higher demand on the travel and living environment. Reduce the temperature of the road surface in the summer to ease the urban heat island effect become a serious problem.Traffic engineers are urgently needed to solve the problem.Through analysis of road surface's heat exchange and principles of temperature decline that we find an effective way to solve the problem and find out the influence factors to control the road surface's temperature.We could choose different materials to control the emissivity and absorptivity except some force majeure natual factors.In order to control the decalescence capability of road surface.Through large numbers of test,we contrast the best content of asphalt, the effect of road surface's temperature decline and road capability at four different material compounding.We find out the asphalt pavement mixes calcines bauxite crushed scone could decline the temperature.Through the text we analyzed the temperature decline mostly depend on the aggregate in bigger size. Through the contrast of the best content of asphalt,we find out the asphalt mixtures with calcines bauxite coarse aggregate have lower asphalt content.So we conclude that all or part of the coarse aggregate of the asphalt mixtures should use calcines bauxite, the fine aggregate and mineral filler of the asphalt mixtures should use ordinarily aggregate in order to get better temperature decline effect.By the result of the contrast,we know that the asphalt mixtures with part of calcines bauxite is better than ordinarily asphalt mixtures at the stability and low temperature stability, but is little worse in water stability.