18. Refer to Tables 2-1.1 and 2-1.2 and Figure 18.9 attached. What would be the thickness of asphalt concrete according to the Asphalt Institute required to support 950,000 ESAL over a 4-inch granular base? Use the resilient modulus data provided in Table 2-1.2 to perform your calculations. Select the best answer.a. 4.0 inchesb. 5.0 inchesc. 7.0 inchesd. 12.0 inches Figure 18.9 Design Chart for Pavements with Asphalt Concrete Surface and Untreated Aggregate Base 4 in. ThickSubgrade Resilient Modulus, M, (lb/in.2)dominfraraumbririh rPETO PAPIAsphalt ConcreteUntreated BaseSubgrade3 ln. minimum345678910¹4 incies4 in. minimum5 in4567891023 In.5678910Equivalent 18,000 lb Single-Axle Load9 in2บ 01111 in.12 In.13 In614 In.910'내외16 in.VIZL215College Park, Md., September 1981.Source: Reproduced from Thickness Design-Asphalt Pavements for Highways and Streets, Manual Series No. 1, The Asphalt Institute,5 6 7 8 910 Table 2-1.1Table 2-1.2Traffic Level,ESALS< 10,00010,000 - 1,000,000> 1,000,000Test Value, Mrpsi1620015700149001410013000120001100010000Design SubgradeValue, Percent607587.5Number Equal to orGreater Than12345678Percent Equal To orGreater Than12.52537.55062.57587.5100

Answered: 18. Refer to Tables 2-1.1 and 2-1.2 and…

Structural Analysis

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ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

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18. Refer to Tables 2-1.1 and 2-1.2 and Figure 18.9 attached. What would be the thickness of asphalt
concrete according to the Asphalt Institute required to support 950,000 ESAL over a 4-inch granular
base? Use the resilient modulus data provided in Table 2-1.2 to perform your calculations. Select the
best answer.
a. 4.0 inches
b. 5.0 inches
c. 7.0 inches
d. 12.0 inches

Figure 18.9 Design Chart for Pavements with Asphalt Concrete Surface and Untreated Aggregate Base 4 in. Thick
Subgrade Resilient Modulus, M, (lb/in.2)
dominfraraumbririh r
PETO PAPI
Asphalt Concrete
Untreated Base
Subgrade
3 ln. minimum
345678910¹
4 incies
4 in. minimum
5 in
45678910
2
3 In.
5678910
Equivalent 18,000 lb Single-Axle Load
9 in
2
บ 01
1
11 in.
12 In.
13 In
6
14 In.
910'
내외
16 in.
VIZL
2
15
College Park, Md., September 1981.
Source: Reproduced from Thickness Design-Asphalt Pavements for Highways and Streets, Manual Series No. 1, The Asphalt Institute,
5 6 7 8 910

Table 2-1.1
Table 2-1.2
Traffic Level,
ESALS
< 10,000
10,000 - 1,000,000
> 1,000,000
Test Value, Mr
psi
16200
15700
14900
14100
13000
12000
11000
10000
Design Subgrade
Value, Percent
60
75
87.5
Number Equal to or
Greater Than
1
2
3
4
5
6
7
8
Percent Equal To or
Greater Than
12.5
25
37.5
50
62.5
75
87.5
100

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