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Bergkamp Mobile Stockpile Allows Maximizing Paving Time

Wed June 08, 2011 - Midwest Edition
Construction Equipment Guide

Bergkamp Inc., based in Salina, Kan., offers the new mobile stockpile, a fully mobile material transfer and storage trailer that increases paving time, reduces costs, simplifies job management and minimizes overweight truck citation risks. It eliminates the need to find off-site stockpiles — one of the biggest challenges preservation contractors face today, according to the manufacturer.

Standard trucks bring aggregate and emulsion directly from the supplier and load the Mobile stockpile, which is located on the job site. Then, truck-mounted slurry seal or micro surfacing pavers can easily connect to it and be fully replenished with material on-site in less than 10 minutes. Traditionally, contractors working to apply high-quality surface treatments require multiple pavers, which often act as haul trucks for more than 70 percent of the job, making multiple trips between the off-site material stockpile and the job site to reload with material. Because this static stockpile is on-site, these multiple longer distance trips are eliminated, so fewer pavers can do more work in less time. The result is better optimization and allocation of workers, fewer pavers per job, less paver idle time and reduced fuel costs — all of which reduce overall production costs.

Using standard dump trucks to load the mobile stockpile with aggregate, and tankers for emulsion, contractors avoid the risk of receiving overweight citations due to overloaded pavers driving to the job site from an off-site stockpile location. Water is replenished via a tanker or hydrant through its 50-ft. (15 m) hose reel transfer. The mobile stockpile is designed to use a minimal footprint, taking just one lane-width of roadway for an entire static stockpile operation. Trucks can bring materials to it directly from the supplier, reducing coordination and site cleanup issues associated with finding temporary stockpile locations — thus simplifying job management while lowering job costs. The mobile stockpile is compatible with most equipment manufacturers’ slurry seal and micro surfacing pavers.

Aggregate is dumped into the inlet hopper located at the rear of the unit. The material is then transferred to the 21.5 cu. yd. (16.4 cu m) main hopper on an enclosed 32-inch (81 cm) inlet conveyor at a speed of up to 6 tons (5.4 t) per minute. The main hopper can either store the material or simultaneously transfer it during filling via a 24-in. (61 cm) discharge conveyor.

The discharge conveyor moves the aggregate up a 28-degree angle before leveling out horizontally toward the discharge end to make a smooth aggregate transition to the slinger conveyor. The slinger conveyor extends and throws the material into the truck-mounted paver at a rate of 3 tons (2.7 t) per minute, retracting and slowing down as the truck evenly fills up to avoid over filling or spilling of the aggregate. Asphalt emulsion is loaded from a tanker evenly into four separate tanks on the mobile stockpile that together hold 6,000 gal. (22,712 L) of asphalt emulsion. It is then pumped into the truck-mounted paver’s asphalt emulsion tank.

The mobile stockpile weighs 40,650 lbs. (18,438 kg) empty and 147,900 lbs. (67,086 kg) when fully loaded. A semi-truck or truck-mounted paver, capable of towing 42,000 lbs. (19,051 kg) with a 6,000-lb. (2,722-kg) vertical load, can pull the unit to the desired location by attaching to a pintle hitch on the end of a sliding tow bar.

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