A flexible pavement has a 4-inch sand-mix asphalt wearing surface, 10-inch soil cement base, and a 10 inch crushed stone subbase. It is designed to withstand 400 20-kip single axle loads and 900 35-kip tandem axle loads per day. The subgrade CBR is 8, overall standard deviation is 0.45, initial PSI is 4.2 and the final PSI is 2.5. What is the probability that this pavement will have a PSI above 2.5 after 30 years? Assume the drainage coefficients are 1.0.

Structural Analysis
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ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
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A flexible pavement has a 4-inch sand-mix asphalt wearing surface, 10-inch soil cement base, and
a 10 inch crushed stone subbase. It is designed to withstand 400 20-kip single axle loads and 900
35-kip tandem axle loads per day. The subgrade CBR is 8, overall standard deviation is 0.45, initial
PSI is 4.2 and the final PSI is 2.5. What is the probability that this pavement will have a PSI above
2.5 after 30 years? Assume the drainage coefficients are 1.0.
Transcribed Image Text:A flexible pavement has a 4-inch sand-mix asphalt wearing surface, 10-inch soil cement base, and a 10 inch crushed stone subbase. It is designed to withstand 400 20-kip single axle loads and 900 35-kip tandem axle loads per day. The subgrade CBR is 8, overall standard deviation is 0.45, initial PSI is 4.2 and the final PSI is 2.5. What is the probability that this pavement will have a PSI above 2.5 after 30 years? Assume the drainage coefficients are 1.0.
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