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. 2025 Jul 27;18(15):3523.
doi: 10.3390/ma18153523.

Research on the Adhesion Performance of Fast-Melting SBS-Modified Emulsified Asphalt-Aggregate Based on the Surface Free Energy Theory

Hao Zhang  1 , Haowei Li  2 , Fei Guo  3 , Shige Wang  1 , Jinchao Yue  3
Affiliations

Research on the Adhesion Performance of Fast-Melting SBS-Modified Emulsified Asphalt-Aggregate Based on the Surface Free Energy Theory

Hao Zhang et al. Materials (Basel). .

Abstract

Aiming at the problems of complex process flow, high energy consumption, and difficult emulsification in the preparation of traditional SBS-modified emulsified asphalt, a preparation method of fast-melting SBS (referred to as SBS-T) modified emulsified asphalt based on the integration of modification and emulsification is proposed. Based on surface free energy theory, the contact angles between three rapid-melting SBS-modified emulsified asphalts with different dosages and three probe liquids (deionized water, glycerol, and formamide) were measured using the sessile drop method. The adhesion performance of the asphalt-aggregate system was studied by means of micromechanical methods. The evaluation indicators such as the cohesion work of the emulsified asphalt, the adhesion work of asphalt-aggregate, the spalling work, and the energy ratio were analyzed. The results show that the SBS-T modifier can significantly improve the thermodynamic properties of emulsified asphalt. With increasing modifier content, the SBS-T-modified emulsified asphalt demonstrated enhanced cohesive work, improved asphalt-aggregate adhesive work, and increased energy ratio, while showing reduced stripping work. At equivalent dosage levels, the SBS-T-modified emulsified asphalt demonstrates a slight improvement in adhesion performance to aggregates compared to conventional SBS-modified emulsified asphalt. The SBS-T emulsified modified asphalt provides an effective technical solution for the preventive maintenance of asphalt pavements.

Keywords: adhesion performance; fast-melting SBS; modified emulsified asphalt; surface free energy.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
SBS-T (left) and SBS (right) modifier.
Figure 2
Figure 2
Integrated preparation process of modification and emulsification.
Figure 3
Figure 3
Optical contact angle measuring instrument: (a) physical diagram; (b) schematic diagram (right).
Figure 4
Figure 4
Contact angle samples of asphalt binders.
Figure 5
Figure 5
Cohesive work of SBS- and SBS-T-modified emulsified asphalt.
Figure 6
Figure 6
Adhesion work of SBS- and SBS-T-modified emulsified asphalt to aggregates.
Figure 7
Figure 7
Stripping work of SBS- and SBS-T-modified emulsified asphalt to aggregates.
Figure 8
Figure 8
Energy ratio of SBS- and SBS-T-modified emulsified asphalt to aggregates.
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