ASTM C-33 Standard
ASTM C-33
Sieve (Specification E11) Percent Passing
9.5-mm (3/8 in.) 100%
4.75-mm (No. 4) 95 to 100%
2.36-mm (No. 8) 80 to 100%
1.18-mm (No. 16) 50 to 85%
600-µm (No.30) 25 to 60%
300-µm (No. 50) 5 to 30%
150-µm (No. 100) 0 to 10%
And Presby Environmental, Inc. Requires:
75-µm (No. 200) 0 to 2% (value must be obtained by washing)*
* This requirement is more strict than ASTM C-33, but is extremely important.