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Sustainability Related Projects

CalRecycle Rubberized Pavement Grant Program

Grant Number:              TRP5-14-0036

Grant Amount:              $47,750.00

Report Period:              March 11, 2015 through April 14, 2016

Prime Contact:              Ryan Gayler, Project Administrator (760) 776-6393

Project Summary and Status:

Town Center Drive:  The Town Center Way resurfacing project was awarded to Granite Construction Company in June 2015.  The project recycled the existing asphalt into a base course of recycled asphalt.  After the recycled asphalt cured, the contractor capped the base course with a 1.8” thick layer of Gap Graded Asphalt Rubber Hot Mix (ARHM).  A total of 1,391.90 tons of ARHM was paved.  The ARHM binder contained 15% crumb rubber, and the asphalt mix was made up of 7.84% binder.  32,737.49 pounds of crumb rubber was used.  The cost of the rubberized asphalt concrete was $.85/square foot for a total of $125,146.35.  The cost per ton of rubberized asphalt was $89.91. 

The paving was conducted at night because the street is in a commercial district with high traffic volumes during the day.  The paving project was completed with no significant problems in August 2015.  The pavement has performed well except for one area near Fred Waring at the stop bar.  The street is heavily trafficked by busses and fire trucks.  The constant stopping motion of heavy vehicles has caused the ARHM cap to shove.  The contractor removed the failed asphalt and the recycled asphalt base course.  The sub-grade was moist and spongy which contributed to the failure.  The contractor allowed the sub-grade to dry out and the area was repaved with a 5” lift of ¾” conventional asphalt.  The patch has performed well and the remainder of the paving job continues to perform well.  The City has received compliments on the quality of the paving.

Portola Avenue:  The Portola Avenue rehabilitation project was awarded to Hardy and Harper, Inc. in November 2015.  The project recycled the existing asphalt into a base course of recycled asphalt.  After the recycled asphalt cured, the contractor capped the base course with a 2” thick layer of Gap Graded Asphalt Rubber Hot Mix (ARHM).  A total of 2,696.01 tons of ARHM was paved.  The ARHM binder contained 20% crumb rubber, and the asphalt mix was made up of 7.80% binder.  84,115.51 pounds of crumb rubber was used.  The cost of the rubberized asphalt concrete was $1.05/square foot for a total of $250,523.70.  The cost per ton of rubberized asphalt was $92.92. 

The cap was paved over a period of two days.  The paving project was completed with no significant problems in March 2016.  The City received no complaints, and the pavement is performing well.

Both projects provide a smooth, quiet ride. 

Waste Tires Diverted:  In total, the equivalent of 9,737.75 passenger tires was diverted from the waste stream.

  

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