Different applications: Improving soil, stabilizing soil
In soil stabilization, a distinction is made between improving the soil and stabilizing it. Lime improves the paving properties and compactability of wet, cohesive soil. This is known as soil improvement. If the aim is to stabilize the soil cement is used because it lastingly enhances the load-bearing capacity, volume stability and resistance to water and frost. Soil can be stabilized or homogenized even without the use of stabilizing agents.
Case example: Soil stabilization in Bloomington/Indiana, USA
In the soil stabilization project on Interstate 69 south of Indianapolis, the newly embanked earth first had to be stabilized in order to create the necessary load bearing capacity for the asphalt pavement of the new approach road. The contractor, Specialties Company, LLC, used lime as a stabilizing agent and took advantage of Wirtgen’s applications expertise. Lime immediately reduces the water content in the soil and binder mix. This ultimately improves compactability and increases the load-bearing capacity of the treated soil. “To achieve the optimum outcome, we always liaise closely with the applications professionals from Wirtgen. They are always on hand to offer their consulting expertise,” explains Jamie Cardiff, Equipment Manager at Specialties Company.
WIRTGEN WR 250 soil stabilizer required
When it came to choosing the machine, too, the Specialties Company’s team put their trust in the innovative technologies from Wirtgen, opting for the WR 250 wheeled soil stabilizer. The 571kW powerhouse also used, among other applications, in cold recycling for granulating asphalt, is the most powerful machine in the WR generation and specially designed for the stabilization of heavy and boggy terrain. With this machine, daily performances of up to 15,000m2 are far from uncommon in soil stabilization applications. After the lime had been pre-spread, the high engine power and optimum traction of the WR 250 enabled it to effortlessly work through the heavy and sometimes deep soil. The WR mixed the soil and binding agent homogeneously across the entire working width of 2.4m to a depth of exactly 30cm.