Aggregate Stockpile Management and Segregation

Aggregate Stockpile Management and Segregation

Preventing segregation and having correct aggregate stockpile management can keep good quality of aggregates. The aggregate segregation will decrease the quality of aggregate.

What causes segregation of aggregate during stockpiling?

As the product is transported by conveyor, vibration and motion of the belt causes fine particles to settle on the bottom. The resulting stockpile is segregated, with coarse particles settled at the toes, and fine particles in the center portion of the pile. Segregation of aggregate base can lead to rejection or costly penalties for the producer, and base material is especially susceptible to segregation because of a greater variation in particle size than that of other stockpiled products.

How to prevent segregation of aggregate during stockpile management?

The formation of a continuous layered stockpile will reduce the effects of segregation and eliminate the need to re-blend the base before shipment. A radial or telescopic conveyor can be used to construct a layered stockpile. If this equipment is not available a dozer may substitute.

How to have a correct stockpile management system?

Using windrow stockpiler with radial telescopic stacker can help us solve this problems.

What should we do?

1. Minimize drop height to limit overrun (variable height conveyors).
2. Use telescoping conveyor and build in windrows.
3. Load from end of pile.

What should we not do?

1. Build stockpile with fixed height conveyors.
2. Build stockpiles with trucks, loaders or dozers.

What are the features of radial stacker for aggregate stockpile management?

1. Easy pile to build.
2. Must have axle system to allow movement radially.
3. Feed point is stationary.
4. Simple way of increasing volume with the same feed point.
5. Increases live storage.
6. Most consistent product to load out.

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