TM 5-822-7/AFM 88-6, Chap. 8
Tabk 6. Gnading of fine aggregate
Sieve Size,
Cumulative Percentage by Weight
P a s s i n g Individual Sieves
U. S. Standard Square Mesh
3/8 in.
100
9723
No. 4
8525
No. 8
20 10
No. 50
64
No. 1 0 0
Note:
I n addition, the fine aggregate, as delivered to the mixer,
s h a l l have a fineness modulus of not less than 2.40 nor
more than 2.90.
T h e grading of the fine aggregate also
s h a l l be controlled so that the fineness moduli of at least
n i n e of ten samples of the fine aggregate as delivered to
the mixer will not vary more than 0.15 from the average
f i n e n e s s moduli of all samples previously taken. The
fineness modulus shall be determined by CRD-C 104
(Appendix A).
Table 7 Deleterious substances in fine aggregate
Percentage by Weight
Material
1.0
Clay lumps and friable particles
3.0
Material finer than No. 200 sieve
0.5
Lightweight particles
Note: The total of all deleterious materials shall not exceed 3.0 percent of the weight of the aggregate.
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