An interstate highway pavement composed of asphalt surface course, cement treated base course and sand- gravel subbase course is to be designed for an ESAL of 1.2 x 10%. The quality of drainage is considered fair because water can be removed from the subbase within a week. However, there is a large amount of precipitation, so more than 25% of the time the pavement will be exposed to moisture levels approaching saturation. The materials properties are as follows: effective roadbed soil resilient modulus = 5500 psi, resilient modulus of subbase = 15000 psi, unconfined compressive strength of cement-treated base = 500 psi and resilient modulus of asphalt layer 4.3 x 10 psi. Determine the thicknesses of surface, base and subbase courses.
An interstate highway pavement composed of asphalt surface course, cement treated base course and sand- gravel subbase course is to be designed for an ESAL of 1.2 x 10%. The quality of drainage is considered fair because water can be removed from the subbase within a week. However, there is a large amount of precipitation, so more than 25% of the time the pavement will be exposed to moisture levels approaching saturation. The materials properties are as follows: effective roadbed soil resilient modulus = 5500 psi, resilient modulus of subbase = 15000 psi, unconfined compressive strength of cement-treated base = 500 psi and resilient modulus of asphalt layer 4.3 x 10 psi. Determine the thicknesses of surface, base and subbase courses.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:An interstate highway pavement composed of asphalt surface course, cement treated base course and sand-
gravel subbase course is to be designed for an ESAL of 1.2 x 10%. The quality of drainage is considered
fair because water can be removed from the subbase within a week. However, there is a large amount of
precipitation, so more than 25% of the time the pavement will be exposed to moisture levels approaching
saturation. The materials properties are as follows: effective roadbed soil resilient modulus = 5500 psi,
resilient modulus of subbase = 15000 psi, unconfined compressive strength of cement-treated base = 500
psi and resilient modulus of asphalt layer 4.3 x 10 psi. Determine the thicknesses of surface, base and
subbase courses.
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