|
Gradiation Requirements |
|
Sieve |
Amounts Finer than Sieve Specified, mass % |
|
Size No. 6 (19.0 to 9.5mm) 3/4 in. to 3/8 in. |
Size No. 67 (19.0 to 4.75mm) 3/4 in. to No. 4 |
|
1 in. (25mm) |
100 |
100 |
|
3/4 in. (19mm) |
90 to 100 |
90 to 100 |
|
1/2 in. (13mm) |
20 to 55 |
*** |
|
3/8 in. (10mm) |
0 to 15 |
20 to 55 |
|
No. 4 (4.75mm) |
0 to 5 |
0 to 10 |
|
No. 8 (2.36mm) |
*** |
0 to 5 |
|
Size number and requirements data are from Specification C 33 and D 448. |
|
Physical Properties |
|
Moisture, max. % |
|
|
Crushed stone and gravel |
2.0 |
|
Crushed roofing slag |
5.0 |
|
Unit mass (loose), min. lb/ft³ (kg/m³) |
60 (960) |
|
Dust, max. % |
2.0 |
|
Hardness, max. percentage passing a 3.35mm (No. 6) sieve |
20 |
|
A higher moisture content is permitted for slag because of moisture entrapment in the internal pores of the pieces of slag. |
|
|
|
NOTE:Dark or black
colored aggregate or soft limestone should not be used. |
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