This simple test is widely used for screening to determine possible presence of organic compounds in fine aggregates. Samples are shaken in a special graduated bottle with a 3% sodium hydroxide solution, then allowed to stand for 24 hours. If the resulting color of the liquid above the test sample is darker than a reference standard color, organic compounds may be present and further testing should be done before approval.
The set includes six graduated 8oz (237ml) colorless glass Impurities Test Bottles, a 1lb (454g) bottle of Sodium Hydroxide (NaOH) Pellets, and a Color Reference Chart. The sodium hydroxide pellets make enough 3% solution to perform over 150 tests. For strict compliance to ASTM and AASHTO standards, order HM-818 Reagent Grade sodium hydroxide pellets. The Color Reference Chart has five permanent reference colors mounted in a durable protective plastic case. The Test Bottles are graduated in oz and ml and have watertight screw-on caps
Meets Test Methods:
ASTM C 40