section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full-depth asphalt pavement. Consists of 40% trucks. If classification studies have shown that the truck factor can be taken as 0.45, design a suitable flexible pavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year of operation is 1000. It is expected that construction will be completed five years from now, and pi =4.5 and pt = 2.5. Growth rate = 4%. Design life = 20 years. The pavement structure will be exposed to moisture levels approaching saturation 20% of the time, and it will take about one week for drainage of water. Effective CBR of the subgrade material is 7. CBR of the base and subbase are 70 (Mr=30000 lb/in2 ) and 22 (Mr=13500 lb/in2 ), respectively, and Mr for the asphalt mixture, 400,000 lb/in2
section of a two-lane rural highway is to be realigned and replaced by a four-lane highway with a full-depth asphalt pavement. Consists of 40% trucks. If classification studies have shown that the truck factor can be taken as 0.45, design a suitable flexible pavement using the 1993 AASHTO procedure if the AADT on the design lane during the first year of operation is 1000. It is expected that construction will be completed five years from now, and pi =4.5 and pt = 2.5. Growth rate = 4%. Design life = 20 years. The pavement structure will be exposed to moisture levels approaching saturation 20% of the time, and it will take about one week for drainage of water. Effective CBR of the subgrade material is 7. CBR of the base and subbase are 70 (Mr=30000 lb/in2 ) and 22 (Mr=13500 lb/in2 ), respectively, and Mr for the asphalt mixture, 400,000 lb/in2
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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section of a two-lane rural highway is to be realigned and replaced by a four-lane highway
with a full-depth asphalt pavement. Consists of 40% trucks. If classification studies have
shown that the truck factor can be taken as 0.45, design a suitable flexible pavement using
the 1993 AASHTO procedure if the AADT on the design lane during the first year of
operation is 1000. It is expected that construction will be completed five years from now, and
pi =4.5 and pt = 2.5. Growth rate = 4%. Design life = 20 years.
The pavement structure will be exposed to moisture levels approaching saturation 20% of the
time, and it will take about one week for drainage of water. Effective CBR of the subgrade
material is 7. CBR of the base and subbase are 70 (Mr=30000 lb/in2
) and 22 (Mr=13500
lb/in2
), respectively, and Mr for the asphalt mixture, 400,000 lb/in2
.
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