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100 <br />90 <br />80 <br />P 70 <br />E <br />R <br />C 60 <br />E <br />N <br />T 50 <br />P <br />A 40 <br />• 30 <br />• 20 <br />1 0 <br />0 <br />1000 <br />PARTICLE -SIZE DISTRIBUTION ASTM D 421 AND D 422 <br />US STANDARD SIEVE OPENING SIZES <br />T 1 3' 13• 37Y NJ 610 070 010 N60 0100 0200 <br />T <br />GRA hart 1 <br />100 10 1 <br />PARTICLE SIZE (mm) <br />Page 1 <br />0.1 0.01 0.001 <br />