Traffic and Highway Engineering
5th Edition
ISBN: 9781305156241
Author: Garber, Nicholas J.
Publisher: Cengage Learning
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Chapter 21, Problem 11P
To determine
The age at which the PCR reaches the value of
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Pavement Condition Index (PCI) Survey is developed by US Army Corps of Engineers to quantify the condition of pavement section so it will enable decision- makers to decide on the most suitable maintenance method for the pavement section. Through the fieldwork survey and then the deskwork, the PCI values, which is used to indicate the general condition of a pavement section are obtained.
List FIVE (5) factors that influence the PCI values and elaborate briefly the relationship of each factor with the PCI values
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.
DESIGN OF A RIGID PAVEMENT1. Give a summary of rigid pavement design procedure by AASHTO method (1993), anddescribe the variables used in the method.2. Explain the CBR test; how to conduct the test and its purposes. Where are the usages oftest results in practical applications? Explain its advantages and disadvantages.3. Determine the thickness of a rigid pavement (thickness of concrete slab) by using thedata provided below:DATA PROVIDED:1. Cumulative 18kips ESAL = 5.000.0002. Overall standard deviation = 0.33. Reliability = 95%4. Design serviceability loose =1.75. Drainage coefficient = 16. Load transfer coefficient = 3.27. Mean concrete modulus of rupture = 650 psi8. Elastic modulus of the concrete to be used = 5.000.000psi9. Results of CBR test on subgrade material in the laboratory (Table 1):10. Standard force-penetration data.
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- The following are the results of pavement distress survey: Distresses identified are: Alligator cracks, patching, raveling and bleeding. The corresponding factors are: 2.4, 2.0, 2.1, 1.5, respectively. The weights are: 9, 6, 3, 3, respectively. Compute the distress rating. Blank 1 Blank 1 Add your answerarrow_forwardPublic Works Department (PWD) received a complaint from the traffic user on the increasing number of pavement deformations such as potholes and crocodile cracks at Jalan Ayer Dalam, Petaling Jaya, Selangor. A site investigation conducted by the PWD revealed that at 5 cm below the center of the tire load, a deflection of 0.889 mm was detected due to a wheel carrying a 30 KN load. The contact radius is measured at 13 cm and the Poisson ratio is 0.5. In order to analyse the pavement's performance, you are requested to determine the pavement's modulus of elasticity.arrow_forwardA transportation agency is planning a pavement roughness data collection program to monitor statewide pavement performance. Assuming that 10 percent of change in roughness should be detectable at 95% confidence level, how many 1-mile pavement segments should be included in the annual condition survey? There are 20,000 center-line miles of pavement in total.arrow_forward
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