Using the AASHTO rigid design procedure, design a pavement for a provincial road with an expected design ESAL of 20 x 106. The pavement structure is to consist of Portland cement concrete with an elastic modulus of 5.0 x 106 psi and a modulus of rupture of 550 psi, and a 12 in. thick unbounded granular material as subbase. The pavement is to be plain jointed and jointed reinforced concrete with tied P.C.C. shoulder and having load transfer devices. The climate consists of a wet season (November-April) and a dry season (May-October). Freezing of the subbase and subgrade is considered negligible. The elastic modulus of the subbase is 20,000 psi during the dry season and 15,000 psi during the wet season. The elastic modulus of the subgrade is 6,000 psi during the dry season and 3,500 psi during the wet season. The subgrade depth to the bedrock is 5ft. It is estimated that it will take a day for water to drain from the pavement and that the pavement will be saturated about 20 percent of the time. Assume that a reliability level of about 95% is required and that the initial serviceability index is 4.0 and the final serviceability index is 2.5. Assume So= 0.35.

Using the AASHTO rigid design procedure, design a pavement for a provincial road with an expected design ESAL of 20 x 106. The pavement structure is to consist of Portland cement concrete with an elastic modulus of 5.0 x 106 psi and a modulus of rupture of 550 psi, and a 12 in. thick unbounded granular material as subbase. The pavement is to be plain jointed and jointed reinforced concrete with tied P.C.C. shoulder and having load transfer devices. The climate consists of a wet season (November-April) and a dry season (May-October). Freezing of the subbase and subgrade is considered negligible. The elastic modulus of the subbase is 20,000 psi during the dry season and 15,000 psi during the wet season. The elastic modulus of the subgrade is 6,000 psi during the dry season and 3,500 psi during the wet season. The subgrade depth to the bedrock is 5ft. It is estimated that it will take a day for water to drain from the pavement and that the pavement will be saturated about 20 percent of the time. Assume that a reliability level of about 95% is required and that the initial serviceability index is 4.0 and the final serviceability index is 2.5. Assume So= 0.35.

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 13P: Repeat Problem 19-7 using two different depths of untreated aggregate bases of 6 in. and 12 in....

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