The operating principle of soil stabilization
The modern cold recyclers and soil stabilizers - here's how they work
Soil stabilization scores top marks in comparison to soil exchange as it requires fewer truck transports, results in shorter construction times, saves resources and reduces CO2 emissions. When operating as a soil stabilizer, the WR uses its powerful milling and mixing rotor to mix pre-spread binders, such as lime or cement, into the existing, insufficiently stable soil at working depths of up to 560 mm to convert it into a construction material of high quality in an in-situ process. The resulting homogeneous soil-binder mixture offers high tensile strength, compressive strength and shear strength values as well as long-term water resistance, frost resistance and volume stability. Typical applications include the construction of paths, roads, motorways, foundations, parking lots, sports grounds, industrial parks or facilities, airports, embankments, backfills or landfills.
Lime improves the paving properties and compactability of wet, cohesive soils.
This process is referred to as soil improvement.
Cement increases the bearing capacity, volume stability and resistance to water and frost on a sustained basis.
This process is referred to as soil stabilization.
For homogenization, the WR uses its powerful milling and mixing rotor to granulate and scarify the existing soil without added binders. The homogenized soil mixture is graded by a motor grader and then compacted by different HAMM rollers.
Soil stabilization with added lime
For soil stabilization, binder is pre-spread in a first step by the all-wheel driven Streumaster SW 19 SC “Rhino”. Following behind the binder spreader, the WR uses its powerful milling and mixing rotor to mix the existing soil and pre-spread binder. The resulting homogeneous soil mixture is graded by a motor grader and then compacted by different HAMM rollers.
Soil stabilization with added cement
For the production of a new hydraulically bound base layer, cement is pre-spread in a first step by a Streumaster towed spreader, which is followed by a water tanker truck. The WR then uses its powerful milling and mixing rotor to mix the existing material and pre-spread cement. Water is simultaneously injected into the mixing chamber via an injection bar. The resulting homogeneous base course material is graded by a motor grader and then compacted by different HAMM rollers.