The Modification Mechanism, Evaluation Method, and Construction Technology of Direct-to-Plant SBS Modifiers in...

Area of Science:

• Materials Science
• Chemical Engineering
• Civil Engineering

Background:

• Styrene-butadiene-styrene (SBS) modified asphalt is crucial for durable road construction.
• Direct-to-plant SBS modifiers offer processing advantages but require further research for optimal performance.

Purpose of the Study:

• To analyze the development and classification of direct-to-plant SBS modifiers.
• To summarize methods for evaluating the modification effects on asphalt.
• To discuss practical application and construction processes.

Main Methods:

• Classification of SBS modifiers based on action mechanisms (instant dissolution, intramolecular lubrication, non-granulation, vulcanization).
• Performance evaluation using fluorescence microscopy, Atomic Force Microscopy (AFM), and molecular dynamics simulations.
• Analysis of construction stages from design to on-site application.

Main Results:

• Common direct-to-plant SBS modifiers utilize small particle sizes (<200 mesh) or specific models, often with additives like EVA, oils, sulfur, or resins.
• These modifiers enhance melting, lubricity, stability, and cross-linking with asphalt components.
• Evaluation methods range from observing particle residue to macroscopic and microscopic analysis of modified asphalt properties.

Conclusions:

• Future development should integrate direct-to-plant SBS modifier properties with field application requirements.
• Targeted research is needed for high-performance modifiers and region-specific production technologies.
• Improving modification effect evaluation and establishing a comprehensive theoretical system are essential.