ABSTRACT
ABSTRACT: Based on Caltrans Maintenance Technical Advisory Guide (MTAG), there are many advantages of using fog or rejuvenating seals. Fog seals improve sealing or waterproofing of existing pavement, reduce aging of binder or prevent further stone loss by holding aggregate in place, or by simply improving the surface appearance. Rejuvenating seals are a combination of various rejuvenating oils, and/or a mixture of asphalt emulsion and recycling oils applied to the asphalt pavement surface. Rejuvenating emulsions restore the maltenes or light components that have oxidized and soften the existing binder, thus reducing the viscosity and improving the flexibility of the binder. Caltrans has been using fog or rejuvenating seals on shoulders and highways through maintenance activities. In order to safely utilizemore fog or rejuvenating seals on the mainline of its highways, Caltrans placed a series of pilot projects during the past five years.
