Conference presentation
Towards a fourth generation of Pavement Management
USC Research Conference, 2014 (Sunshine Coast, Australia, 14-Jul-2014–18-Jul-2014)
University of the Sunshine Coast
2014
Abstract
Background: The design of road pavement has been postulated on the fact that there are two critical conditions that cause road pavement to fail; these are: • Horizontal Tensile Strain at the underside of the bound lay - causing Fatigue cracking. • Vertical Compressive Strain at the top of the subgrade materials - causing permanent deformation of all layers above the subgrade. The research aims to assess the effects of climate and traffic on pavement quality and its impact on the economy, using a seasonally adjusted method and Simulation Techniques to design flexible pavements using the Mechanistic. The project has been broken into six separate studies • A study of environment effects on the behaviour of an asphalt pavement • The effect of solar radiation on pavement surface layer tempera • The effect of rapid changes in moisture content of pavement behaviour • Long term pavement deterioration in fatigue, rutting and ravelling modes under traffic and environment conditions. The initial Research findings • There is a clear that both strains (Bound and Unbound layers are increasing (but faster than may be predicted). • Heating & Cooling: It has become apparent that there is a different pathway for strains versus temperature as a function of weather pattern is in the "heating" or "cooling" phase. • The quantum of heat developed in the pavement on a daily basis together with ratio of heating to cooling the pavement heats at about twice the rate that it cools. • Based on the Standard Axle Repetitions computed, it can be seen the terminal limits of 40 milling Million SAR would be -112µÉ› and + 750 µÉ› for surface layer and sub layer strains respectively. • The result revealed that 400,000 SAR has consumed about half of the theoretical terminal strain limit. • The major conclusion of the study to date is designs should be adjusted for critical strains on a seasonal basis. This approach has indicated potential saving in road construction costs of $1 million per road kilometre.
Details
- Title
- Towards a fourth generation of Pavement Management
- Authors
- Abdelrazek A Abdelrazek (Author) - University of the Sunshine Coast - Faculty of Science, Health, Education and Engineering
- Conference details
- USC Research Conference, 2014 (Sunshine Coast, Australia, 14-Jul-2014–18-Jul-2014)
- Publisher
- University of the Sunshine Coast
- Date published
- 2014
- Copyright note
- Copyright © 2014 The Author.
- Organisation Unit
- School of Science and Engineering - Legacy; University of the Sunshine Coast, Queensland
- Language
- English
- Record Identifier
- 99448941402621
- Output Type
- Conference presentation
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