Application of Atomic Force Microscopy as Advanced Asphalt Testing Technology: A Comprehensive Review

Area of Science:

• Materials Science
• Civil Engineering
• Surface Science

Background:

• Extensive research links asphalt composition, macro performance, and microstructure.
• Atomic Force Microscopy (AFM) is a key tool for studying asphalt microstructure and mechanisms.
• Previous studies have analyzed asphalt performance from its microstructure, proposing evaluation indices and modification methods.

Purpose of the Study:

• To review the application and analysis of AFM in studying asphalt aging, regeneration, and modification.
• To introduce the history of rheological, chemical, and AFM-based asphalt testing.
• To provide research directions for popularizing AFM in asphalt studies and standardizing testing methods.

Main Methods:

• Review of existing literature on AFM applications in asphalt science.
• Analysis of AFM principles and various operational modes for asphalt microstructure investigation.
• Synthesis of historical data on rheological, chemical, and AFM testing of asphalt.

Main Results:

• AFM has been extensively used to observe and analyze asphalt microstructure, linking it to macro performance.
• Various evaluation indices and modification strategies for asphalt materials have been developed based on microstructural insights.
• The review highlights AFM's role in understanding asphalt aging, regeneration, and modification properties.

Conclusions:

• AFM is crucial for understanding the relationship between asphalt microstructure and macro performance.
• Standardizing AFM testing methods is essential for future research and applications in asphalt science.
• This review provides a valuable reference for researchers aiming to advance AFM applications in asphalt materials.