Reader curious about road noise and new pavement

The in basket: James Bergman, whose e-mail URL suggests that he’s in the paving business, commented on a Road Warrior column of last September about Kitsap County trying out variations on its traditional paving processes, most notably on Madrona Drive in the Parkwood development in South Kitsap.

Jacques Dean, the county’s road superintendent, describes it at the time as “a rubberized chip seal.”

“This product and application is very similar to our traditional chip seal product,”  he said. “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.”

James wrote, “I’m really glad that you are doing these sealing tests. The only way to progress is through trial and error. However, you mention that each of the methods … provide quieter rides. Is there any noticeable difference between the noise level of driving over the different sealants?”

The out basket: I hadn’t noticed any noteworthy difference in road noise on the test area, noticeable from its different texture, and Jacques agreed.

“I have not noticed any measurable noise difference either,” he wrote. “A quieter ride was a proposed secondary benefit of the rubberized chip seal product; the primary being the rubberized asphalt oils ability to better withstand degradation associated with ultraviolet light, its pliability over time and subsequent ability to resist reflective cracking.”



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