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ผนวก ค.

TABLE NO 1
GRADATION SPECIFICATION LIMIT FOR BITUMINOUS PAVEMENTS

ASPHALT MIXTURE - SURFACE COURSE - LOW PRESSURE TIRES ( 100 Psi & under)
Percent passing (by weight)

Sieve 1 1/2 inch maximum 1 inch maximum 3/4 inch maximum

Size Gradation 1 Gradation 2 Gradation 3
1 1/2” A B C A B C A B C

100 100 100 - - - - - -
1” 79-95 83-96 86-98 100 100 100 - - -

3/4” 70-84 74-86 78-90 80-95 84-96 90-98 100 100 100

1/2” 61-75 66-79 71-84 68-86 74-89 79-93 80-95 84-90 87-98
3/8” 54-68 60-72 65-78 60-77 66-82 72-87 72-86 76-82 80-92

#4 42-54 48-60 54-66 45-60 52-68 60-75 55-70 61-67.5 67-80

#8 33-45 39-51 45-57 34-49 41-57 49-64 43-57 49-55.5 56-58
#16 26-37 31-42 37-48 26-40 33-47 40-54 34-46 39-45 46-57

#30 19-29 23-33 29-38 19-30 25-37 30-43 26-36 30-35 36-46

#50 14-22 17-25 21-29 14-23 18-28 21-32 18-27 21-25.5 26-34
#100 8-14 10-16 13-19 8-16 11-18 13-21 10-17 13-16.5 16-22

#200 3-6 3.5-6.5 4-7 3-7 3.5-7.5 4-8 3-7 3.5-5.5 4-8