API RP 56

Describes procedures and equipment that can best be used in testing and evaluating sand for use in hydraulic fracturing operations. The objective of the recommended tests is to improve the quality of frac sand delivered to the well site. Suggested procedures are presented for sand sampling; sample storage and retention; sand sieve analysis; determining average particle sphericity and roundness; evaluating sand acid solubility, analysis of silt content; determination of sand crush resistance, and sand mineralogical analysis tests.