Yes, according to the provided information, river sand is also known as sharp sand.
Sharp sand, which goes by several names, is a type of sand characterized by its gritty texture and angular grains. Unlike smooth, rounded sands often used in recreational play areas, sharp sand retains its natural, less-processed state.
What is Sharp Sand?
Based on the reference, sharp sand is also known as grit sand or river sand. It is further identified as:
- Builders' sand: Often used in construction projects.
- Concrete sand: A key ingredient in concrete mixtures.
- ASTM C33: When it meets specific medium or coarse grain standards.
It is explicitly stated that sharp sand (and thus river sand) is "not cleaned or smoothed to the extent recreational play sand is."
Practical Uses of Sharp Sand (River Sand)
The reference highlights several common applications for sharp sand:
- Concrete mixes: Its angular grains help create strong, stable concrete.
- Potting soil mixes: It can improve drainage and aeration in soil.
- Loosening clay soil: Adding sharp sand helps break up dense clay structure, improving drainage and workability.
- Building projects: Used in various construction tasks beyond just concrete.
Comparing Sand Types
While not explicitly detailed in the reference, understanding different sand types helps clarify the nature of sharp sand.
| Sand Type | Characteristics | Common Uses |
|---|---|---|
| Sharp Sand | Gritty, angular grains, often coarse | Concrete, mortar, soil amendment, building |
| Play Sand | Fine, rounded, washed, often soft | Sandboxes, recreational areas |
| Soft Sand | Finer, rounded grains, often silty | Mortar, rendering, plastering (not in reference) |
In summary, when people refer to sharp sand, they are often talking about the same material as grit sand or river sand, particularly when used for construction or soil amendment purposes due to its angular, gritty nature.
