Tag Archives: chip seals

Kitsap trying out new paving techniques

The in basket: I’ve noticed that paving of streets in Parkwood in South Kitsap this year resembles chip seals, but the result is darker in color, smoother and has less loose rock. I asked about it.

The out basket: Jacques Dean, Kitsap County road superintendent, tells me, “These locations were part of a seal coat pilot project. We applied three different applications of emerging pavement preservation methods to three different roadways in South Kitsap County.

“Our intent is to observe these treatments over the next several years to determine if they are methods that we might want to consider for our maintenance toolbox to preserve our roadways in the future.  The three different applications are as follows:

– We applied a rubberized chip seal to Madrona Drive SE.  This product and application is very similar to our traditional chip seal product.  It differs in that the oil that is placed on the road surface includes a crumb rubber component.  The rubberized oil has a higher viscosity than our traditional oil and as such, is more pliable, is more resistant to ultra violet degradation and reflective cracking, and provides for a quieter ride.

– We provided a two-part rubberized chip seal / slurry seal to Hillandale Drive E and Hillandale Court. E.  Two part applications, such as this, are considered “Cape Seals”.  The rubberized chip seal is placed first, and the slurry seal is placed over the chip seal a couple of weeks later, sufficient to allow the chip seal to set up and cure.

“The slurry seal provides for additional sealing of the pavement surface, and also fills the voids between the chip rock, providing for a smoother aesthetic appearance and quieter ride.

– We provided a traditional chip seal / slurry seal to Pine Tree Drive SE and SE Pine Tree Drive.  This is also a Cape Seal and provides similar benefits as those mentioned above.  The difference in the two is, of course, the rubberized versus the standard chip seal oils.  Traditional chip seal oil is more susceptible to ultra violet light degradation and reflective cracking over time than the rubberized oil.

“We will be contracting for another seal coat pilot project in 2016.  We have not yet determined the type of preservation method, or locations, as of this time.  We will be evaluating potential applications and locations over the fall and winter seasons.

“These ‘new’ preservation methodologies are emerging in the Pacific Northwest, but have been utilized in southern states for decades where warmer temperatures predominate.  It is only recently that innovations in technology have allowed for the advancement of asphalt oils that are conducive to our colder and wetter climate.

“This has opened the door for us to investigate these products. Kitsap County is the fourth county in the state, behind Clark, Pierce and Chelan, to apply these techniques.”