Civil Engineering Reference
In-Depth Information
Table 3.1
Various proposals for sand grading indices
Limits of size fraction
Sieve
d (mm)
de (mm)
de (in)
Se (m
2
/m
3
)
m
e
λ
ρ
A
I
f
s
Modiied SS
3-1½ in
75-37.5
56.25
2.21
106.7
9.56
0.638
9.33
2.53
0.020
0.06
-2.5
(100)
(100)
(100)
(100)
(100)
(100)
(100)
(100)
(100)
(-100)
1
37.5-19.0
28.25
1.11
212.4
8.56
1.01
11.34
357
0.035
0.12
-2.0
(50.2)
(50.2)
(199)
(895)
(158)
(122)
(141)
(175)
(200)
(-80)
2
19.0-9.5
14.25
0.561
421.4
7.58
1.59
13.95
503
0.005
0.19
-1.0
(25.3)
(25.3)
(395)
(793)
(250)
(150)
(199)
(275)
(317)
(-140)
4
9.5-4.75
7.12
0.280
842.7
6.58
2.53
17.49
7.12
0.075
0.27
1.0
(12.7)
(12.7)
(790)
(68.2)
(396)
(187)
(281)
(375)
(450)
(40)
8
No. 4-No. 8
4.75-2.36
3.56
0.140
1685
5.58
4.02
22.3
10.07
0.096
0.39
4.0
(6.32)
(6.32)
(15.80)
(58.4)
(631)
(239)
(398)
(480)
(650)
(160)
15
No. 8-No. 16
2.36-1.18
1.77
0.0697
3390
4.57
6.40
29.2
14.28
0.116
0.55
70
(3.15)
(3.15)
(3178)
(47.8)
(1003)
(313)
(564)
(580)
(917)
(280)
27
No. 16-No. 30
1.18-0.60
0.89
0.0350
6742
3.58
10.10
39.0
20.14
0.160
0.70
9.0
(1.58)
(1.58)
(6321)
(37.4)
(1584)
(418)
(796)
(800)
(1167)
(360)
(39)
No. 30-No. 50
0.60-0.30
0.45
0.0177
13333
2.60
15.94
53.5
28.32
0.24
0.75
9.0
(0.80)
(0.80)
(12500)
(27.2)
(2500)
(573)
(1119)
(1200)
(1250)
(360)
58
No. 50-No. 100
0.30-0.15
0.225
0.0089
26667
1.60
25.30
76.8
40.06
0.35
0.79
7.0
(0.40)
(0.40)
(25000)
(16.7)
(3969)
(819)
(1583)
(1750)
(1317)
(280)
81
No. 100-pan 0.15-0 0.075 0.0030 ? 0 — ? ? ? 1.0 2.0
(0.13) (0.13) (1667) (80) 105
Notes: Values in parentheses are presented relative to the numerical characteristics of size fractions 3-1
½
in (75-37.5 mm).
d
' = average particle size; mm d
e
= average
particle size; z = speciic surface (Edwards, 1918);
m
= ineness modulus;
e
= water requirement (Bolomey, 1947);
λ
= distribution number (Solvey, 1949);
ρ
= stiffening
coeficient (Leviant, 1966);
A
=
A
value (Kluge, 1949);
I
=
I
Index (Faury, 1958);
f
s
= surface index (Murdock, 1960).
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