Santa Barbara County Uses CalRecycle Grant Funds to Rebuild Roadway with Recycled Tires
How do you repurpose 81,000 recycled tires? Well, use them to create a new retaining wall, of course.
That’s what happened with a recent road stabilization project in Santa Barbara County. This unique application utilized 810 tons of tire-derived aggregate to backfill a retaining wall composed of large, rock-filled, welded wire baskets called gabions.
In March 2018, CalRecycle awarded the county $158,241 in Tire-Derived Aggregate Grant Program funds to purchase the TDA material.
Prior to the project, failed soil in the embankment caused erosion to the old roadway and shoulder. The ongoing failure also created large cracks in the asphalt surface.
But the new retaining wall is expected to have longer staying power due to the TDA material. UC San Diego researched the road repair technique and determined that TDA is seismically safe for retaining walls and for road repairs and will not degrade due to poor underlying soils or saturated conditions.