CIR STUDY

UDOT is working to improve specifications for Cold In-place Recycling, an important cost saving option for resurfacing roads.

The CIR process rejuvenates old asphalt into a new road.

Cold In-Place Recycling is a way to reuse asphalt on site. The process uses a long train of equipment to pulverize and add binder to old asphalt, then compact the rejuvenated material a new road. CIR is a cold process, so the energy used to heat Hot Mix Asphalt is also saved. There are also many CIR processes and uses, which gives contractors and engineers at UDOT options for bidding and designing good solutions for maintaining roads.

At about one half to one one-third of the cost of new asphalt CIR is a cost effective process when used in the right location. In order to gain more knowledge about the process UDOT is working with researchers and contractors to identify the best types of emulsion and understand the curing process.

Knowing more about emulsion used with CIR will ultimately help UDOT achieve a more durable product. The curing process is critical since prematurely putting traffic on the new road will cause rutting.UDOT puts a premium on getting traffic back on the road, so understanding the curing process will help engineers pinpoint the right time to open the roadway.

Knowing more about the process is a “big benefit for everybody” in the local transportation industry, says engineer Tim Biel of CME Transportation Group. Biel and other contractors are working together to find out more about the cost-saving process. The contractors have a vested interest in “being part of the solution” so CIR can continue to be an effective tool to rejuvenate UDOT’s roads.

2 thoughts on “CIR STUDY”

  1. Terry Humphrey

    I will be working with public works departments, civil engineers and contractors for the next year or so gathering information / specifications about CIR and FDR projects. This is a global approach sponsored by Caterpillar Paving Products. What I learn about types of emulsions used and their curing times, I will gladly pass on to you. Please add me to any “contacts” list that you are creating.

    Terry Humphrey
    Training Mgr., Cat Paving (retired)

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