### Understanding the Structural Number in Flexible Pavements**Question:**The structural number is a function of the thickness and material of the three layers of flexible pavements.1. ○ True2. ○ False---**Explanation:**In the context of flexible pavement design, the structural number (SN) is indeed a function that represents the overall structural capacity of the pavement. This value is calculated based on the thickness and material properties of the three primary layers, which typically include:1. **Surface Course** - The top layer, which is directly exposed to traffic.2. **Base Course** - The middle layer, providing strength and distributing loads.3. **Subbase Course** - The bottom layer, primarily for additional support, especially in areas of poor subgrade soils.The structural number is determined through a formula that combines the layer coefficients (which reflect the material properties) and layer thicknesses, ensuring the pavement can adequately support expected traffic loads.**Answer:**- True

A flexible pavement is composed of a surface layer of bitumen-bound aggregate (asphalt concrete),…

Answered: The structural number is a function of…

The structural number is a function of the thickness and material of the three layers of flexible pavements. O True O False

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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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.

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