ASTM C 40 - 04 Standard Test Method for Organic Impurities in Fine Aggregates for Concrete

American Society for Testing and Materials (ASTM). Current edition approved Jan. 1, 2004. Published January 2004. 2 p. This test method covers two procedures for an approximate determination of the presence of injurious organic impurities in fine aggregates that are to be used in hydraulic cement mortar or concrete. One procedure uses a standard color solution and the other uses a glass color standard