Civil Engineering Reference
In-Depth Information
Percent of Aggregate B in blend
Range of acceptable blends
100
90
80
70
60
50
40
30
20
10
0
100
100
12.5 mm
90
90
Sieve lines
80
80
Lower-limit line
70
70
9.5 mm
60
60
Percent passing
2.36 sieve
for blend
Upper-
limit line
50
50
0.60 mm
40
40
0.30 mm
4.75 mm
30
30
0.15 mm
20
20
2.36 mm
10
0.075 mm
10
0
0
0
10
20
30
40
50
60
70
80
90
100
Recommended blend
Percent of Aggregate A in the blend
FIGURE 5.14
Graphical method for determining aggregate blend to meet
gradation requirements. See Table 5.8.
T ABLE 5.8
Example of Aggregate Blending Analysis by Graphical Method
19 mm
12.5mm 9.5mm
4.75mm 2.36mm
0.60mm
0.30mm
0.15 mm
0.075mm
Sieve
(3/4 in.)
(1/2 in.)
(3/8 in.)
(No. 4)
(No. 8)
(No. 30)
(No. 50)
(No.100)
(No.200)
Speci-
100
80-100
70-90
50-70
35-50
18-29
13-23
8-16
4-10
fication
Agg. A
100
90
59
16
3
0
0
0
0
Agg. B
100
100
100
96
82
51
36
21
9
Blend
100
95
80
56
43
26
18
11
4.5
Note:
Numbers shown are percent passing each sieve.
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