Given: Flexible pavement in rural interstate highway. Design ESAL 3000000 Subbase exposed to moisture saturation 5% of time & drainage quality is fair. Base saturation level 10% of time (Fair drainage quality). Mr (HMA) = 420,000 psi Mr (base) = 24,000 psi Mr (subbase) = 10,000 psi CBR (Subgrade) = 1.0 Reliability Level R = 85% So = 0.45 APSI = 2 Required: Design the pavement by the AASHTO method

Q: Why do the majority of the state highway departments of the United follow the standards of the…

A: The American Association of State Highway and Transportation Officials (AASHTO) is a standard for…

Q: 1. Determine the maximum load P that can be applied to the beam if the bearing plates A' and B' have…

A:

Q: How does traffic engineering contribute to road safety?

A: Different disciplines of traffic engineering optimize the movement of both vehicles and pedestrians…

Q: Describe total cost, average cost, marginal cost, and economies of scale in Highway engineering.

A: Describe total cost, average cost, marginal cost, and economies of scale in Highway engineering.

Q: The center-point loading flexure strength test was performed on a concrete beam having a cross…

A: To determine the flexure strength of concrete from the center-point flexure strength test.   Give,…

Q: What are the basic similarities among all state highway specifications?

A: The State Highways are the arterial roads of a state which connects the national highways of the…

Design of pavements

Pavement is a structure that is made up of different layers such as sub-base course layer, base course layer, binder course, and a surface course formed with different materials such as gravel, above the subgrade soil constructed to act as a path or carriageway enabling the movement of vehicles. The surface of the pavement should possess characteristics such as adequate friction, light reflection, and drainage. The pavements are classified based on structural design into rigid pavements, flexible pavements, composite pavements, and unpaved pavements. The process of determining a suitable pavement type, its constituent layers, and its thickness is called pavement design.