Experimental project : use of shredded tires for lightweight fill.
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Experimental project : use of shredded tires for lightweight fill.

Filetype[PDF-4.26 MB]


English
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Details:

  • Alternative Title:
    Experimental project use of shredded tires for lightweight fill : post-construction report.
  • Creators:
  • Corporate Creators:
    Oregon. Dept. of Transportation. Highway Division
  • Subject/TRT Terms:
  • Publication/ Report Number:
    DTFH-71-90-501-OR-11
  • Resource Type:
    Tech Report
  • Geographical Coverage:
    Oregon
  • Corporate Publisher:
    Oregon. Dept. of Transportation. Highway Division
  • Abstract:
    Shredded rubber tires have been used as lightweight fill in repair of a landslide that occurred under a highway embankment in mountainous terrain on Highway US 42 (Oregon State route #35). The force driving the slide was decreased by removing the soil embankment and replacing it with a lighter weight embankment constructed with shredded tire chips. The tire embankment has a three-foot-thick compacted soil cap on the top and side-slopes and supports a conventional aggregate base and asphalt pavement. 5800 tons of shredded tires were used - approximately 580,000 tires. Cost of the tires delivered to the site was $30/ton reduced by a $20/ton reimbursement from Oregon DEQ; net $10/ton ($7/yd3). Cost of placing and compacting the tires was $8.33/ton ($5.85/yd3). Total cost of the tire fill at final in-place density was $18.33/ton ($12.87/yd3). Surface monuments, settlement plates, and slope inclinometers have been installed to monitor the performance of the embankment.

    Shredded tire chips were transported to the project site in "live-bottom" trailers from vendors located 150 to 200 miles from the project. The trailers each carried 28 tons of tires. The tire chips were placed and compacted in three-foot lifts using a D-8 dozer. Density (unit weight) of the tire chips was on the order of 30 pcf when "loose" in the haul vehicle, 45 pcf compacted in-place, and 52 pcf when compressed under the soil cap and pavement. The 12.5-foot-thick section of compacted tire embankment compressed 20 inches (13.4%) under the capping load. Few construction problems were encountered. Exposed wires in the tire chips caused tire punctures on dump trucks.

    Pavement surface deflections were measured using a falling weight deflectometer. Deflections were twice as great as would be expected of the same pavement over an earth embankment. Vibrations similar to those felt when standing on a bridge can be felt by a person standing on the embankment when a heavy truck crosses it.

  • Format:
    PDF
  • Funding:
    DTFH-71-90-501-OR-11
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