In recent years, the infrastructure developed rapidly. So the requirement of the building sand increased speedily and the price of the building sand grow rapidly. The ecological environment and the safety of the rivers were already overwhelmed after the excessively exploiting.

For this reason, the mechanical sand was considered as the best substitute for the natural sand. Compared with the natural sand, the mechanical sand has much more advantages, such as high-quality, resource-rich, low-cost and less investment in equipment.

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