724 N. Mercer Street | Decatur, IL 62522



Henry County Highway 19 CIR 2014

Henry County – County Highway 19


Steven L. Brandau – County Engineer


Cold In-Place Recycling

  • 4-inch Depth
  • Engineered Emulsion – 1.8 gallons per square yard
  • A-2 Oil and Chip Surface Treatment

CH 19 – 77,400 square yards

  • Road deterioration due to heavy machinery from Bishop Hill Wind Farm
  • Longitudinal cracking
  • Raveling/stripping discovered during coring for mix design
  • Some HMA patching (2013) done to deter deterioration of road in certain sections
  • Base repair (2012) due to large machinery from Bishop Hill Wind Farm




The beginning of environmental potholes. This road in northwest Illinois became weathered after a severe winter with prolonged sub-zero temps and significant snowfall. 


It became difficult to consult this winter due to the heavy snow amounts and multiple polar vortices. (I am still working on my “see-through-the-snow” goggles patent, but it is not going as planned.)



The road condition from a visual standpoint is fair.  However, the deterioration of this road is significant.  The findings are the result of exploratory coring and analysis.



Area where base failure was corrected prior to CIR.  Base failure and drainage issues are the first two things I look for when determining candidacy for CIR, because CIR efforts are unsuccessful when those specific conditions are present.



Longitudinal cracking due to heavy machinery traffic during the construction of Bishop Hill Wind Farm.

When I was taking this photo, a gentleman came running out of his house with only a coat and a very impressive mullet, asking why I was taking pictures of him.  When I yelled across the field to him that I was only taking photos of the road, he yelled back “sweet!”  I thought this was a rather odd retort.  Later, I would find out this man had missed his court date and thought I was with local police.



HMA patching done in 2013.

(Very similar to the area where glacial waters meet the Gulf of Alaska—Google it!)



Large section of HMA patching.



Bishop Hill Wind Farm – Fall 2013. 

Ah, the greatness of Instagram, making all of our photos look like we know what we are doing.



Coring and mix design done by Heritage Research Group.  Six inches of bituminous material.  Coring was done in fall 2013 to determine candidacy.

(If you look closely, the engineer’s book has chocolate ice cream on it. Don’t ask…it was freezing that day.)



During coring, stripping was the presumed culprit. This was proven when the material was analyzed in the lab, but this core examination shows why stripping was originally assumed. 

They were right.



Stripping – when the asphalt binder film debonds, or “strips” from the aggregate particle in the presence of water.


As you can see, the ice cream is now frozen to the page. Silly geo-tech.



This is a photo of the bottom of the core, showing the binder debonding from the aggregate. More coring was required in 2014 to gather additional material for testing to finalize the mix design. 


During the 2014 coring, the team could not extract compacted cores—the material would fall apart upon retraction. The team had to use jack hammers (they were not happy) to extract material, and thus my name became mud that day…)

Piatt County Highway 9 CIR 2013
Animated Video of Cold-In Place Recycling

By accepting you will be accessing a service provided by a third-party external to https://dunnco.com/

(217) 429-4444 | Fax: (217) 429-7917
Based in Decatur, Illinois, Dunn Company provides pavement and base solutions across Central Illinois and throughout the greater Midwest region.
Site by Business Builders