Slurry Seals Effective Treatment on Local Streets
Each summer the Public Works Department contracts for slurry seal treatment on residential streets as part of Eugene's Pavement Preservation Program.
See List of 2016 Projects Below
A slurry seal is a thin layer of asphalt emulsion, rock and sand. Slurry seals are used to seal the existing pavement against intrusion of water, fill in small cracks, provide a uniform surface and restore surface friction, which improves driveability and skid resistance. Slurry seals are beneficial on streets with older pavement, or where surface material has begun to wear off leaving a rough surface. They protect pavement from oxidation, which leads to brittleness and cracking, and keep water out of the road base by sealing existing cracks. Since slurry seals do not add any structural value to a street they are best used on local streets or collector streets with little structural damage and where regular truck traffic is not expected.
Due to the small amount of materials needed and the quick application time (usually one day), slurry seals provide a very cost effective way to extend the life of our pavements. The average cost of a slurry seal is about one-tenth of an asphalt overlay and one-fiftieth of total reconstruction costs.
The Slurry Seal ProcessHere's how a slurry seal project is typically done in several phases:
- First, damaged areas on streets scheduled for slurry seals are fixed. This may involve digging up and replacing an area of damaged pavement, or it could simply mean a surface patch applied over smaller pavement defects. During this phase, streets are generally open for through traffic although there may be short delays and lane detours around work zones.
- Then the contractor will come back and clean and fill cracks. Street access typically is maintained during crack-sealing operations. Street sweepers are used to collect as much surface grit and debris as possible.
- About a week after the cleaning and crack-sealing work, the contractor will put the slurry seal on the pavement, usually from curb to curb. Because the slurry seal takes several hours to cure, streets may be closed for up to eight hours.
- Once the slurry seal has hardened, the street is reopened and the job is completed.
List of 2016 Slurry Seal Streets
Approximately 10 street segments in several areas of the city are scheduled to receive slurry seal treatments in 2016 (map to be published soon):
- Assumption Street and CDS, from Trevon St to Astove Ave
- Barger Drive CDS, from Barger Dr to W End CDS
- Cosmoledo Street, from Silhouette St to 170 Mahe Ave
- Mahe Ave, from Assumption St to Cosmoledo St
- Silhouette St, from Trevon St to Mahe Ave
- Sugarpine Circle, from Terry St to Sugarpine Circle
- Trevon Street, from Cosmoledo St to Terry St.
- Trevon Street, from Terry St to Cosmoledo St.