Sharp sand

Sharp sand, also known as grit sand or river sand and as builders' sand, concrete sand, or ASTM C33 when medium or coarse grain, is a gritty sand used in concrete and potting soil mixes or to loosen clay soil[1] as well as for building projects.

It is not cleaned or smoothed to the extent recreational play sand is.

[2] It is an angular grained sand.

Sand and gravel ridges known as eskers are a frequently used source.

[5] This material-related article is a stub.