October 7th, 2010

UDOT RECLAIMS 7800 SOUTH

Uncategorized, by Catherine Higgins.

A process that recycles old asphalt into new road base was recently used on 7800 South in West Jordan.

A tanker followed by a reclaimer adds emulsion to crushed asphalt. Road Science is the sub-contractor working with Condie Construction on this project.

Full Depth Reclamation has been used by UDOT for about five years. The process uses a large piece of equipment called a reclaimer to grind up and re-use the old road instead of removing old road material and hauling it off.

Here’s a simple step by step:

First, a few inches of asphalt is milled off the old road. The area is pulverized and water is added, if needed. The reclaimer passes over the road and grinds up the pulverized portion, then passes again and adds an emulsion.

After a few roller passes, the area is tested for correct compaction.

At this point, the material is slightly oily and looks like Oreo cookie crumbs. A sheep’s foot roller and a grader are used to compact and grade the soon-to-be road base.

The new base material is then rolled to the correct compaction. With evaporation, the compacted area gets harder and becomes suitable as new road base. On 7800 South asphalt pavement tops off the process.

Lonnie Marchant, Materials Engineer at UDOT Region Two is a champion of FDR because the process:

Makes good economic sense. It’s a good use of increasingly scarce resources to recycle road material if possible.

Produces a good base. Structural numbers for FDR are almost as good as new asphalt.

Reduces wear on surrounding haul routes. UDOT has observed wear and tear on roads near other projects sites after heavy trucks haul away materials.

Reduces impact to road users and property owners along the construction corridor. FDR is great for an urban setting because the process is fast and requires fewer large trucks that slow traffic. Vehicles can drive over the crushed material right away, so driveways are only blocked while the equipment passes.

FDR has been used on three Region Two projects with very good results. UDOT will continue to use FDR and other processes that save money and make good use of used road products.

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Responses to “UDOT RECLAIMS 7800 SOUTH”

  1. Hi there,
    Glad I stumbled on your site. Can I share something ?
    Have you heard about the Sumsion Construction LC and did you know that since the early 1900′s, the Sumsion name has been synonymous with asphalt paving in the state of Utah. Valley Asphalt, based in Spanish Fork, Utah was owned by the Sumsion family until 1997 when it was sold to a nation-wide construction company. Through three generations, the Sumsion family had built one of the largest, most well-respected asphalt paving companies in the state. So if you wanna get in touch with them just try to visit their site Ecklespaving.com.

  2. Very interesting! Do you know, are there any records of early asphalt paving jobs done by Sumsion? I would like to know about early work in the downtown Salt Lake area and between Salt Lake and Davis County to the north. Thanks for your comment!

    Catherine Higgins at December 30, 2010 6:47 am
  3. I think this method if road surfacing is a really good idea. Any way of saving money is welcome in these tough economic times. I wish they would use something like this where I live instead of blocking the whole road.

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