Research on Performance of High-elasticity Modified Asphalt Chip Seal for Plateau Regions
In order to solve the rapid performance degradation of asphalt pavement in plateau regions,a chip seal was designed based on the modified high-elasticity asphalt mixed with nano-TiO2 powders(MHEA chip seal),and the pavement performances of MHEA chip seal were evaluated through labo-ratory experiments.The results show that the addition of nano-TiO2 can effectively delay the attenua-tion of penetration and tensile strength of modified high-elasticity asphalt after UV aging,thereby en-hancing the anti UV aging performance of asphalt.Meanwhile,MHEA chip seal exhibits excellent an-ti-slide performance,waterproofness,low-temperature bonding performance between crushed stone and asphalt and UV-aging resistance,which is potential for application in plateau regions.
modified asphalt with high-elasticitynano-TiO2chip sealUV aging
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