Pavement Structural Design

Pavement Design Principle:

Pavement design is a process of selection of appropriate pavement and surfacing materials to ensure that the pavement performs satisfactory meeting functional and structural requirements with minimal maintenance under the anticipated traffic loading for the design period. This selection process involves adoption of material types, thicknesses and configurations of the pavement layers to meet the design objectives.

Objective of Pavement Design are to:

  • provide safe and comfortable riding conditions to all road users
  • provide minimum whole of life cost
  • comply with relevant standards and guideline ( In Australia with AUSTROADS and State/Territory Road Authorities Standards and Guidelines

Pavement Types:

Pavements can be classified into either flexible or into rigid pavements. Some common types of pavements are as below:

  • Granular Pavements with Sprayed Seal Surface
  • Cemented Granular Bases with Sprayed Seal Surface
  • Granular Pavements with Thin Asphalt Surface
  • Thick Asphalt over Granular Pavements
  • Asphalt Pavements
  • Concrete Pavements

Design Period

Generally design period of 20 years for flexible pavement and 40 years for rigid pavements adopted. Whole of Life Cycle Cost analysis should be carried out to check it to be minimum but at the same time safety and public concern should be considered.

Austroads Guide to Pavement Technology Part 2 contains procedures for the design of the various forms of pavement. State and Territory road authorities may have their own standards and guidelines as supplement to the Austroads guidelines.

Click on the links below to download some state’s supplement to Austroads design guidelines:

Queensland Pavement Design Supplement

South Australian Supplement to Austroads Design Guide

Western Australia_Engineering Road Note 9