MNS is the smallest sieve size through which all the aggreagte pass. hence MNS of the sample is 9.5 mm.
sieve opening (mm) | weight of retained(g) | cumulative weight retained(g) | %commulative weight retained |
38 | 0 | 0 | 0 |
19 | 0 | 0 | 0 |
9.5 | 0 | 0 | 0 |
4.76 | 29 | 29 | 2.9 |
2.4 | 123 | 152 | 15.2 |
1.2 | 242 | 394 | 39.4 |
0.6 | 294 | 688 | 68.8 |
0.3 | 212 | 900 | 90 |
0.15 | 100 | 1000 | 100 |
3.163 |
Therefore, fineness modulus of coarse aggregates = sum (cumulative % retained) / 100 = 3163/100=3.163.
Grading curve:
sieve size(mm) |
percentage passing |
38 | 100 |
19 | 100 |
9.5 | 100 |
4.76 | 97.1 |
2.4 | 84.8 |
1.2 | 60.6 |
0.6 | 31.2 |
0.3 | 10 |
0.15 | 0 |
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