#### Aggregates - Portland Cement Association

• Nominal Maximum Size The smallest sieve opening through which the entire amount of aggregate is permitted to pass •Example ASTM C33 requires that 100 of a 57 coarse aggregate MUST pass the 1 5 sieve but 95 - 100 MAY pass the 1 sieve therefore 57 aggregate is considered to have a Maximum size of 1 5 and an