Test Method Title
Standard Test Method for Organic Impurities in Fine Aggregates for Concrete
Reference Number
ASTM C40
Material
Aggregate
Test Property
Injurious organic impurities
Description of Test
The fine aggregate is placed into a glass bottle with a 3% sodium hydroxide solution. The mixture is shaken vigorously and allowed to stand for 24-hours. The color of the supernatant liquid then compared with standard colors. If the color of the solution is darker than the Organic Plate No. 3, the aggregate is considered to contain organic impurities that may be injurious to concrete.
Number of Test Specimens
1
Test Specimen Size
400 g
Keywords
Impurities, Injurious, Organic