Preservation Treatments
Crack Seal
Used to seal cracks in pavement surfaces to prevent water infiltration and accelerated pavement degradation. Cracks must be cleaned of debris prior to filling or sealing. This treatment is good for sealing small to moderate surface cracks. Asphalt emulsion is used as the material to seal the cracks.
Sand Seal
Used to improve skid resistance of facilities and seal out water from penetrating the pavement surface. It gives the pavement a 'black top' look and prevents oxidation of the road (turning of the road white & making brittle due to the loss of asphaltic liquid). Liquid asphalt or emulsion is applied to the paved surface and covered with fine aggregate (slag sand).
Chip Seal
Used on high volume, heavy load, and high speed roadways. It is good for sealing small to moderate surface cracks and improves skid resistance along roadways. It adds durability and extends the service life of the pavement. A layer of asphalt emulsion is overlaid by a layer of aggregate and rolled (performed twice with different sized stone and oil rate if doing a double chip seal for added structural stability).
Pug Mix
This material is made using a pugmill and mixes aggregate and sand with specified oil for asphalt and cold patch material. This product remains flexible and is good for roads with linear traffic. It is applied through a paver like traditional hot mix asphalt material and adds durability to the pavement while extending the service life of the facility.
Total Patching
This technique mixes asphalt emulsion and aggregate to provide a pothole filling material. It is applied using a Total Patcher machine and is good for sealing edges of patches or filling failed areas of pavement.
Extensive Patching
This pavement treatment includes saw cutting the failed pavement areas and removing the failed material. The void is then filled with angular aggregate and compacted for stability. A tack coat (asphalt emulsion) is applied on the aggregate as an adhesive material then asphalt material (pug or HMA) is applied and rolled for compaction. Lastly, the edges of the patch are sealed by crack sealing or by using the Total Patcher using stone or sand aggregate.