The Organic Impurities Set is used to detect the presence of deleterious organic compounds in fine aggregates intended for use in hydraulic cement mortar or concrete.
This preliminary test serves as an indicator of potential organic contamination, which may adversely affect the strength and durability of concrete.
After the settling period, the color of the supernatant liquid is compared against a standardized color reference chart to assess the presence of organic impurities.
This method is widely recognized for its simplicity and effectiveness in providing a quick assessment of aggregate quality concerning organic content.
