The aging simulating tests of the SBS and SBS modified asphalt under the conditions of wet and dry are compared and the effect of water on the aging of modified asphalt was investigated by infrared spectroscopy analysis. The results showed that: after aging in the wet conditions the change range of asphalt performance increased. Infrared spectroscopy analysis results showed that the carbonyl content of asphalt and SBS after the aging in wet conditions increased. It was proved that the presence of water accelerated the aging of asphalt and SBS under the action of heat and oxygen. This is mainly due to the substances containing carbonyl groups is further oxidized into carboxylic acids under the action of water, while the double bond in SBS chain can occur the hydration reaction in the coupled WaterHeat condition and become the polar groups.
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Geng et al. (2013) studied this question.
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