| Product and recycled content | rubberized asphalt rubblizing technique |
| Application | resurfacing project replaces conventional asphalt overlays rubblizing re-uses existing pavement subgrade |
| Location/Date | East Lake Sammamish Parkway summer/fall, 1997 |
| Project manager/user | Luke Korpi, P.E., Engineer King County Department of Transportation Roads Division, (206)296-8760 |
| Architect/Engineer | Bill Oakes King County Department of Transportation Roads Division |
| General Contractor | Lakeside Industries, (425)313-2600 Bob Sturgis, Project Manager |
| Background, history | To determine differences in traffic noise associated with different paving types. |
| Performance | To date, no differences in performance or traffic noice characteristics. |
| Source of material | Rubberized Asphalt: Idaho Asphalt Supply, Post Falls, Idaho Rubblizing-uses on site material |
| Quantity | 1804 tons rubberized asphalt, covers 3600 lf of roadway Approximately 1100 cu. yds was "rubblized" covering 2500 lf of roadway |
| Cost | Rubberized Asphalt: $37.20/ton compared to conventional asphalt on same
project cost $27.60 ton Rubblizing concrete pavement cost $4.55 per sq. yd. |
| Cost savings or increase | Rubberized asphalt cost approximately 35% more than convewntional asphalt
on this project Rubblizing saved buying approximately 1100 cu. yds of virgin gravel or concrete materials |
| Installation, costs/savings | Not significant |
| Source of extra funds | N/A |
| Would you buy this product again? | Yes. |
| Why or why not? | Will continue to pursue use of rubberized asphalt on a trial basis. Rubblizing is an effective constreuction technique for certain site-specific conditions. |
| Comments | Traffic noise levels were monitored before and after the overlay. Results: to date, no differences in traffic noise have been observed between the different pavement types. Overall, noise was reduced by 2.6 - 4.8 decibels due to the overlay, but it was not dependent on pavement type |
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