The 10 per cent Fines Aggregate Crushing Value is the force in kN required to crush a sample of 13 2 9 5mm aggregate so that 10 per cent of the total test sample will pass a 2 36 mm sievefine aggregate for use in other types of construction The limitations on the amount of organic impurities allowed in fine aggregates are determined by the test method for organic impurities AASHTO T 21 and the test method for Mortar Strength AASHTO T 71 According to the Standard Specifications materials failing the organic impurities test are to be tested for the effect of organic
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