Why is MoDOT doing this project?
The project area is located Johnson County and is a primary route for a successful local quarry. Normal wear and tear on the road had already degraded the surface. The addition of trucks carrying large loads has cause rapid deterioration. MoDOT is going to try a full depth pavement solution to re-build the road from the ground up.
What is the solution?
A full-depth pavement reclamation is needed to bring this road up to a higher standards that will accomodate local traffic and the weighted quarry trucks.
Full-depth reclamation is a recycling process in which the pavement section and a portion of the subgrade are pulverized, then treated with a chemical additive such as Portland Cement. The result is a chemically stabilized base course that provides a much stronger, stiffer and long lasting section for the new pavement or surface layer
First, workers mill off the top layer of asphalt. Then they use this machine to grind and pulverize the old asphalt, rock and soil below down more than 10 inches in depth.
Another machine then combines the mix with Portland cement and compacts it into a thick, hard base.
Then paving crews come in and overlay the base with a new 3-inch-thick asphalt driving surface on top.
The full-depth reclamation process is several times more costly than a typical milling and asphalt overlay project, but the more extensive treatment is the best treatment to prepare the road for the extreme demands created by heavy truck traffic.
MoDOT used this same technique on Route Y in Cass County which also hosts a nearby quarry. Click here to watch a video of the process
What is the project timeline?
Construction activities are anticipated to begin in summer of 2017.
For more information:
Please contact Richard Shipley, Johnson County Area Engineer at 816-739-1374.