Soil Stabilization and Modification Treatments

Reclaimer/Tiller 

• One or more self-propelled reclaimers/tillers to mix the subgrade soils with midifying/stabilizing agent
• The reclaimer/tiller should have controls to adjust depth of mixing
• The reclaimer should have a computerized liquid addition system, a meter to record the flow and total amount of liquid added, and a positive interlocking system linked to the speed of the reclaimer to adjust the liquid addition rate 

Calibrated Bulk Spreaders/Distributors

• Required for application of dry modifying/stabilizing agent
• They should be non-pressurized mechanical vane-feed, cyclone or screw type capable of providing a consistent, accurate and uniform distribution of material while keeping dust to a minimum

Tanker Trucks

• Bituminous stabilizing agents (emulsified asphalt and asphalt for foaming) are deliverered to the project site in tanker trucks and fed into the reclaimer using the reclaimer's on-board liquid addition system

Motor Grader

• For pre-shaping, aerating, spreading and final shaping of the modified/stabilized subgrade

Water Trucks

• For supplying water to the reclaimer and for the addition of moisture for compaction and curing
• Water trucks should be capable of providing a controlled consistent spray without eroding or otherwise damaging the stabilized subgrade

Compaction Equipment

• Self-propelled rollers complete with properly operating scrapers, knockdown blade and water spray systems as necessary
• Any combination of segmented padfoot, vibratory padfoot, rubber-tired, vibratory single or double drum rollers can be used

Curing or Fog Sealing Equipment

• A bituminous distributor truck or chemical curing distributor truck to apply treatment at a uniform rate over the full width of the treatment area in a single pass (if required)
• A self-propelled screenings or salt spreader to apply blotter sand at a uniform rate over the stabilized subgrade (if required) 

Pugmill Mixer

• A pugmill mixer is occasionally used for central plant mixing on soil stabilization projects.  The pugmill mixer has a soil feed conveyor belt with a belt scale linked to a computerized liquid stabilizing agent, water and additive system that accurately meters the materials into the pugmill based on the weight of the soil. Dry stabilizing agents are typically transferred via silo augers or separate transfer devices tied to the belt scale.  

Haul Trucks

• For hauling stabilized soils materials from a pugmill, to the project