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Integrated Design of Materials and Structures for Flexible Base Asphalt Pavement
Bin Huang1,2,3,4, Qinxue Pan1,2,3, Xiaolong Chen1,2,3
1School of Transportation, Changsha University of Science and Technology, Changsha 410114, China.
Materials (Basel, Switzerland)
|August 14, 2025
Summary
This study introduces a dual-modulus theory for asphalt pavement design, linking material properties to structural performance. Optimized designs improve stress distribution and extend pavement service life.
Area of Science:
- Civil Engineering
- Materials Science
- Geotechnical Engineering
Background:
- Current asphalt pavement design methods lack quantitative links to material properties and ignore tensile-compressive disparities, leading to analysis errors.
- Existing models often fail to accurately predict pavement performance due to simplified material behavior assumptions.
Purpose of the Study:
- To develop an integrated material-structure design approach for flexible base asphalt pavements using dual-modulus theory.
- To numerically analyze pavement structural responses and fatigue life under varied configurations.
- To determine optimal layer mixes based on mechanical parameter modeling.
Main Methods:
- Employed dual-modulus theory for numerical analysis of flexible base asphalt pavements.
- Investigated the influence of layer thickness and modulus on structural responses and fatigue life.
- Modeled mechanical parameters to optimize layer mixes for integrated design.
Main Results:
- Structural responses and fatigue life were found to vary nonlinearly with pavement thickness and modulus.
- Material modulus had a greater impact than thickness, with tensile modulus effects being more pronounced than compressive ones.
- Surface transverse strain exhibited the highest sensitivity to both thickness and modulus.
Conclusions:
- Recommended compressive-tensile modulus ratios for upper, lower, and base layers (1.5, 2.0, and 1.2, respectively).
- The integrated design method achieved superior stress distribution and significantly extended pavement service life.
- This approach yields more realistic pavement design lifetimes by accounting for material behavior.
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