Abstract
To improve the working performance of fog seal material and leverage its quality enhancement role in maintaining pavement, the new fog seal materials with significant permeability and bonding properties were prepared by adding penetrant. The change rules in the permeability of fog seal materials at different working conditions were studied. The macroscopic and microscopic combined method for evaluating the permeability of fog seal materials was proposed, and the correlation between permeability and asphalt mixture porosity was determined. The results showed that the fog seal materials with 4 % II penetrant have best permeability. The recommended spraying volume of fog seal is 0.6 kg/m2, and the construction temperature is 25 °C. The fog seal has a penetration depth of 8.4–34.4 mm at a porosity of 4 %−10 %. The proposed penetration depth evaluation method combining indoor testing and CT scanning can accurately evaluate the penetration performance of fog seal materials.
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