This standard is concerned with determination of organic impurities in natural sand used in mortar and concrete by an approximate process, to give an indication of presence or absence of these impurities in an injurious proportion.
SASO SSA 250-1981 history
1982SASO SSA 250-1981 METHODS OF TEST FOR CONCRETE AGGREGATES PART 2 : DETERMINATION OF ORGANIC IMPURITIES IN NATURAL SAND