Give a summary of rigid pavement design procedure by AASHTO method (1993), and describe the variables used in the method.
Give a summary of rigid pavement design procedure by AASHTO method (1993), and describe the variables used in the method.
Traffic and Highway Engineering
5th Edition
ISBN:9781305156241
Author:Garber, Nicholas J.
Publisher:Garber, Nicholas J.
Chapter19: Design Of Flexible Highway Pavements
Section: Chapter Questions
Problem 16P
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Question
DESIGN OF A RIGID PAVEMENT
- Give a summary of rigid pavement design procedure by AASHTO method (1993), and describe the variables used in the method.
- Explain the CBR test; how to conduct the test and its purposes. Where are the usages of test results in practical applications? Explain its advantages and disadvantages.
- Determine the thickness of a rigid pavement (thickness of concrete slab) by using the data provided below:
DATA PROVIDED:
- Cumulative 18kips ESAL = 5.000.000
- Overall standard deviation = 0.3
- Reliability = 95%
- Design serviceability loose =1.7
- Drainage coefficient = 1
- Load transfer coefficient = 3.2
- Mean concrete modulus of rupture = 650 psi
- Elastic modulus of the concrete to be used = 5.000.000psi
- Results of CBR test on subgrade material in the laboratory (Table 1):
10. Standard force-penetration data.
Transcribed Image Text:DESIGN OF A RIGID PAVEMENT
1. Give a summary of rigid pavement design procedure by AASHTO method (1993), and
describe the variables used in the method.
2. Explain the CBR test; how to conduct the test and its purposes. Where are the usages
of test results in practical applications? Explain its advantages and disadvantages.
3. Determine the thickness of a rigid pavement (thickness of concrete slab) by using the
data provided below:
DATA PROVIDED:
Table 1.
Table Standard force-penetration
1. Cumulative 18kips ESAL = 5.000.000
Penetration
Load
relationship (CBR = 100%)
2. Overall standard deviation = 0.3
(millimetres) (kN)
Penetration Load
3. Reliability = 95%
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
1.6
(mm)
(kN)
3.3
4. Design serviceability loose =1.7
4.9
11.5
17.6
6.6
8.2
9.3
10.5
11.4
12.2
13.0
4
5. Drainage coefficient = 1
22.2
6. Load transfer coefficient = 3.2
26.3
30.3
33.5
10
12
7. Mean concrete modulus of rupture = 650
psi
5.0
8. Elastic modulus of the concrete to be used = 5.000.000psi
9. Results of CBR test on subgrade material in the laboratory (Table 1):
10. Standard force-penetration data.
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