Case Study: MDOT US-10 Rehabilitation

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Case Study Overview

Project: Michigan DOT US-10 Rehabilitation
Location: Clare & Isabella Counties, Michigan
Project Type: Unbonded Concrete Overlay with Adhesive
Product Used: GEOTEX® Nonwoven

Photo of the road before Geotex Nonwoven application.

Problem

The Michigan Concrete Association (MCA) and the Michigan Department of Transportation (MDOT) wanted to test nonwoven geotextiles as an alternative to a 1 inch hot mix asphalt separation layer in unbonded concrete overlay projects. US-10 in Clare, MI was chosen for the trial based on its existing pavement condition. The nearly 60-year-old pavement is 24 feet wide with two lanes in each direction and nine inch jointed reinforced concrete pavement.

Solution

The project was split into three sections using GEOTEX® Nonwoven 1041NH and 1741NH and a standard 1 inch Hot Mix Asphalt Separator Layer (HMASL). All areas were divided by full-depth reconstruct sections. Transverse joints unbonded overlay sections were spaced 12 feet apart and contained 1 inch load transfer bars. The concrete pavement Interlayers were installed using ProGrip™, an adhesive that replaces the traditional nail-down installation method. It is more cost efficient and faster than the traditional nails.

Photo of GEOTEX Nonwoven installation in progress.
Photo of GEOTEX Nonwoven installation in progress.

Solution

The project was split into three sections using GEOTEX® Nonwoven 1041NH and 1741NH and a standard 1 inch Hot Mix Asphalt Separator Layer (HMASL). All areas were divided by full-depth reconstruct sections. Transverse joints unbonded overlay sections were spaced 12 feet apart and contained 1 inch load transfer bars. The concrete pavement Interlayers were installed using ProGrip™, an adhesive that replaces the traditional nail-down installation method. It is more cost efficient and faster than the traditional nails.

GEOTEX Nonwoven installation in progress

Performance

The installation team was impressed with the ease of the installation process and the strength of the adhesive bond during windy conditions. MDOT chose the adhesive installation method because it is more cost effective than current standard practices. Over the next 25 years, this project will be evaluated using a variety of test methods.


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