Sharp sand explained

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. It is useful for drainage.^[2] It is an angular grained sand.^[3] It was used in the production of brass.^[4] It is now used in the building trade. Sand and gravel ridges known as eskers are a frequently used source.^[5]

Notes and References

1. Web site: Definition of sharp sand. davesgarden.com.
2. livingearth.netSharp Sand | Living Earth Texas
3. Web site: Definition of SHARP SAND. www.merriam-webster.com.
4. Web site: London Encyclopaedia; Or, Universal Dictionary of Science, Art, Literature and Practical Mechanics: Comprising a Popular View of the Present State of Knowledge. November 16, 1829. Thomas Tegg. Google Books.
5. Book: Lyle, Paul. Between rocks and hard places: discovering Ireland's northern landscapes. October 27, 2010. Macmillan. 9780337095870. Google Books.