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Is the sandbag used for flood control really useful?
Sandbags for flood control are really useful.

Whenever the rainy season comes, low-lying areas, basement entrances, garages and so on are essential. The temporary waterproof project is completed in the shortest time, and the sandbags are easily moved. Emergency disasters, typhoon floods, floods, drainage works, garage water retaining, soil collapse prevention and other emergency temporary works and flood control necessities.

After the water rushes to the sandbag, although it will penetrate into the cracks of the sand, under the action of complex factors such as the surface tension of the water, the sand and the water will temporarily merge into one, and the whole sandbag will become heavy and can withstand the tremendous pressure of the flood.

Secondly, when water enters the cracks in the sand, the sand will become "hard" under the action of complex factors such as surface tension, but at the same time it will become sticky and soft enough. This wet sand can be piled up into a "castle", and sandbags can also be shaped into the required shapes, nested with each other, leaving no gaps to prevent floods from invading sandbags.

Use:

1 to prevent underground, MRT and basement from flooding. 2. Prevent houses, garages, shops, schools, hospitals, stations, buildings, factories and warehouses from being flooded.

3, prevent mud invasion.

4. Prevent other low-lying areas from being flooded.

5. Drainage, waterproofing and water retaining in the project.