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Smart Self-Healing Capability of Asphalt Material Using Bionic Microvascular Containing Oily Rejuvenator
Peng Yang1, Li-Qing Wang2, Xu Gao2
1School of Civil Engineering and Management, Guangzhou Maritime University, Guangzhou 510725, China.
Materials (Basel, Switzerland)
|November 13, 2021
Summary
Intelligent asphalt pavements use bionic microvasculars with rejuvenators for self-healing micro-cracks. This study confirms microvasculars enhance asphalt healing efficiency, prolonging pavement life.
Area of Science:
- Materials Science
- Civil Engineering
- Nanotechnology
Background:
- Asphalt pavement degradation necessitates innovative repair strategies.
- Bionic microvascular systems offer a promising approach for self-healing materials.
Purpose of the Study:
- To investigate the self-healing capability of asphalt incorporating microvasculars filled with rejuvenators.
- To analyze the impact of microvasculars on asphalt microstructure and mechanical properties.
Main Methods:
- Microstructure observation using optical microscopy and Micro-CT scanning.
- Tensile testing to evaluate self-healing efficiency under varying conditions.
- Development of a preliminary mathematical model for healing efficiency.
Main Results:
- Successful demonstration of microcrack healing via rejuvenator diffusion from microvasculars.
- Enhanced tensile strength and significant self-healing efficiency (up to 86%) observed.
- Healing efficiency positively correlated with microvascular content, healing time, and temperature (0-30 °C).
Conclusions:
- Microvasculars containing rejuvenators are effective in the self-healing of asphalt pavements.
- The study validates the practical role of this bionic approach in extending pavement lifespan.
- Healing efficiency is governed by rejuvenator release, penetration, and diffusion dynamics.
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