Structural Behavior of Asphalt Pavements

Intergrated Analysis and Design of Conventional and Heavy Duty Asphalt Pavement

Lijun Sun

• Publisher: Butterworth-Heinemann
• Year: 2016
• Print ISBN: 9780128028575
• eBook ISBN: 9780128028933
• Topic: Technology & Engineering
• Subtopic: Materials Science
• Index: Technology & Engineering

Structural Behavior of Asphalt Pavements provides engineers and researchers with a detailed guide to the structural behavioral dynamics of asphalt pavement including: pavement temperature distribution, mechanistic response of pavement structure under the application of heavy vehicles, distress mechanism of pavement, and pavement deterioration performance and dynamic equations.An authoritative guide for understanding the key mechanisms for creating longer lasting pavements, Structural Behavior of Asphalt Pavements describes the intrinsic consistency between macroscopic performance and microscopic response, structure and material, as well as global and local performances, and demonstrates the process of pavement analyses and designs, approaching science from empirical analyses.- Analyzes the external and internal factors influencing pavement temperature field, and provide a review of existing pavement temperature prediction models- Introduces a "Bridge Principle through which pavement performance and fatigue properties are consolidated- Defines the intrinsic consistency between macroscopic performance and microscopic response, structure and material, as well as global and local performance- Summaries the mechanistic response of pavement structure under the application of heavy vehicle, distress mechanism of pavement, pavement deterioration performance and dynamic equations, and life cycle analysis of pavement

Chapter 1

Introduction

Abstract

Pavement structure is a part of road structure, which consists of the following elements: subgrade, subbase course, base course, and asphalt layer, all of which directly bear the effects of heavy loads and environmental conditions. The basic requirements for pavement are durability, smoothness, and safety (ie, skid resistance). Pavement should also be constructed in a way that is as friendly to environment as possible. Durability means longer service life; that is, the pavement structure must have enough strength and resistance to deformation. In fact, all of the current pavement design methods were established based on durability, which is the core of pavement design. The smoothness of pavement ensures riding comfort, which is more important for drivers on freeways and highways because of faster travel speeds. If the pavement is smooth, it not only ensures a high quality of riding, but it also diminishes the potential damage due to the dynamic loads of vehicles to pavements. As a result, the pavement will last longer. In order to ensure a pavement's smoothness, proper structure, material design, and construction are necessary. Skid resistance is the requirement to the surface characteristics of pavement, means the driving safety provided by the pavement wearing course, traditionally not included in the structure design.

Keywords

Pavement design; California bearing ratio; Structure number; AASHO; Present serviceability index

1.1 Pavement Design Requirements

Pavement structure is a part of road structure, which consists of the following elements: subgrade, subbase course, base course, and asphalt layer, all of which directly bear the effects of heavy loads and environmental conditions. The basic requirements for pavement are durability, smoothness, and safety (ie, skid resistance). Pavement should also be constructed in a way that is as friendly to environment as possible. Durability means longer service life; that is, the pavement structure must have enough strength and resistance to deformation. In fact, all of the current pavement design methods were established based on durability, which is the core of pavement design. The smoothness of pavement ensures riding comfort, which is more important for drivers on freeways and highways because of faster travel speeds. If the pavement is smooth, it not only ensures a high quality of riding, but it also diminishes the potential damage due to the dynamic loads of vehicles to pavements. As a result, the pavement will last longer. In order to ensure a pavement's smoothness, proper structure, material design, and construction are necessary. Skid resistance is the requirement to the surface characteristics of pavement, means the driving safety provided by the pavement wearing course, traditionally not included in the structure design.

A pavement can become distressed in various ways, including cracking (eg, fatigue cracking, low-temperature cracking, and reflective cracking), deformation and new emerging distresses. When pavement becomes distressed early on, it means that it was constructed with inadequate durability. Too much distress means the pavement is no longer usable; therefore, it is said to have a short lifespan. This is why limiting and delaying distress are the main objectives in pavement design.

When compared with other structures of highway engineering, the lifespan of pavement structure is very short. Generally, the design lifetime for the asphalt pavements is only 15 years in China to save the initial construction cost. With increasing traffic volume, the effects of pavement maintenance and rehabilitation on the highway traffic become more and more significant, so the design lifetime of pavement tends to be longer, which gradually evolved into the long-life pavemen...

Table of contents

• Cover image
• Title page
• Table of Contents
• Copyright
• Preface
• Chapter 1: Introduction
• Chapter 2: Distribution of the temperature field in a pavement structure
• Chapter 3: Analysis of load stress for pavement structure
• Chapter 4: General damage characteristics for asphalt pavement
• Chapter 5: The mechanism of initial damage for asphalt pavement
• Chapter 6: The structural behavior equation for asphalt pavements
• Chapter 7: The structural behavior of overlaid asphalt pavements
• Chapter 8: LCCA-based design method for asphalt pavement
• Chapter 9: Predictions of rutting on asphalt pavements
• Chapter 10: The Bridge Principle: Universal pavement behavior equations
• Chapter 11: Shear strength measurements for asphalt mixture
• Chapter 12: Integrated pavement structural and material design
• Chapter 13: Asphalt mix homogeneity
• Chapter 14: The precise design of asphalt pavement
• Appendix I: Development of a static device for the tire-pavement contact pressure test
• Appendix II: Tests of tire-pavement contact pressure
• Appendix III: Analysis of the test results of tire-pavement contact pressure
• Appendix IV: Climatic data for six regions and monthly average air temperature in 1951–80 for the provincial capitals
• Index