Improvement Technology for UV Aging Resistance of SBS Modified Asphalt Mixed With SiO2
In order to improve the anti UV aging performance of asphalt,low-cost SiO2 was used as an anti UV aging modifier to modify SBS asphalt.The influence of SiO2 and its dosage on the UV aging resistance of SBS modified as-phalt was evaluated by studying the changes in surface tension,rheological properties and chemical composition be-fore and after UV aging.The research results indicate that SiO2 and SBS modified asphalt only have physical mixing.The addition of SiO2 can improve the UV aging resistance of SBS modified asphalt.When the dosage is 0.8％,the prepared SBS modified asphalt has excellent high-temperature deformation resistance,fatigue resistance,low-tem-perature crack resistance,and water damage resistance.
SBS modified asphaltSiO2UV agingperformance improvement
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