Answered: Percent Passing Size 12.5 9.5 4.75 2.36…

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Question

Table shows the grain size distribution for two aggregates and the specification limits for an asphalt concrete. Determine the blend proportion required to meet the specification and the gradations of the blend. On a semilog gradation graph, plot the gradations of aggregate A, aggregate B, the selected blend,and the specification limits.

Percent Passing
Size
12.5
9.5
4.75
2.36
0.60
0.30
0.15
0.075
19 mm
mm
mm
mm
mm
mm
mm
mm
mm
(3/4 in.) (1/2 in.) (3/8 in.) (No. 4) (No. 8) (No. 30) (No. 50) (No. 100) (No. 200)
Spec. limits
35-50
4–10
100
80–100 70–90
50–70
18–29
13–23
8–16
41
38
Aggregate A
Aggregate B
100
100
100
79
66
21
12
100
92
54
24
3

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