Road Base Stabilization Equipment

Pugmill Mixer

• A pugmill mixer is often used for central plant mixing on base stabilization projects.  The pugmill mixer has an aggregate 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 aggregate. Dry stabilizing agents are typically transferred via silo augers or separate transfer devices tied to the belt scale.  

Reclaimer 

• One or more self-propelled reclaimers to mix the base materials, stabilizing agent and additives
• The reclaimer should have controls to adjust depth of mixing
• The reclaimed 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 stabilizing agents and additives
• 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
• Aggregate may be placed by a mechanical spreader, conventional paver or by tailgating

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 stabilized material

Haul Trucks

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

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 aggregate base

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 full width of the treatment area in a single pass (if required)