ASTM-C40

Organic Impurities

Applicability: ASTM C40 is a standard test method used to determine the presence of organic impurities in fine aggregates (sand) used in concrete, providing a preliminary indication of their potential impact on concrete strength.

Purpose: ASTM C40 serves as a quick and visual test to identify if a fine aggregate contains organic impurities that could negatively affect the strength and durability of concrete.