"aggregate" in concrete, portland cement, asphalt, mortar, and plaster, or can be used alone as "fill" in the construction of building foundations, runways, highways, dams, and a wide range of other applications.
the kind of sand that is used in sand sculptures is reguler sand just with a touch of water so it may harden just like if you have dry sand then you cant do anything when it is wet you may sculpt.