Civil Engineering Reference
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Calculate the percent passing through each sieve. Plot the percent
passing versus sieve size on
a. a semilog gradation chart, and
b. a 0.45 gradation chart (Figure A.22).
5.18 A sieve analysis test was performed on a sample of coarse aggregate
and produced the following results:
Sieve Size
Amount Retained, lb
3 in.
0
2 in.
0
1-1/2 in.
5.2
1 in.
18.1
3/4 in.
14.8
1/2 in.
16.3
3/8 in.
25.0
No. 4
8.5
Pan
1.6
a. Calculate the percent passing through each sieve.
b. What is the maximum size?
c. What is the nominal maximum size?
d. Plot the percent passing versus sieve size on a semilog gradation
chart.
e. Plot the percent passing versus sieve size on a 0.45 gradation chart
(Figure A.22).
f. Referring to ASTM C33, what is the closest size number and does
it meet the gradation for that standard size?
5.19 Draw a graph to show the cumulative percent passing through the
sieve versus sieve size for well-graded, gap-graded, open-graded,
and one-sized aggregates.
5.20 Table P5.20 shows the grain size distributions of aggregates A, B,
and C. The three aggregates must be blended at a ratio of 15:25:60
by weight, respectively. Using a spreadsheet program, determine the
grain size distribution of the blend.
Table P5.20
Percent Passing
Size
25
19
12.5
9.5
4.75
1.18
0.60
0.30
0.15
mm
mm
mm
mm
mm
mm
mm
mm
mm
Aggregate A
100
100
100
83
67
49
37
25
18
Aggregate B
100
100
74
51
32
24
19
13
7
Aggregate C
100
82
66
42
27
14
5
0
0
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