Nanomaterial Composite Compatibilized Rubber–Plastic Elastomer–Asphalt Interface Mechanism and Performance Evaluation.
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| Title: | Nanomaterial Composite Compatibilized Rubber–Plastic Elastomer–Asphalt Interface Mechanism and Performance Evaluation. |
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| Authors: | Xie, Tangxin1 (AUTHOR), He, Zhongming1,2 (AUTHOR), Li, Jue1,2,3 (AUTHOR) lijue1207@126.com, Huang, Chao1,3 (AUTHOR), Wang, Pengxu1,2 (AUTHOR), Zhao, Qiao1,3 (AUTHOR) |
| Source: | Materials (1996-1944). May2026, Vol. 19 Issue 9, p1857. 18p. |
| Subjects: | Asphalt modifiers, Interface dynamics, Heat storage, Thermoplastic elastomers, Plastic scrap, Nanocomposite materials, Titanium dioxide nanoparticles |
| Abstract: | Conventional rubber–plastic modified asphalt often suffers from poor compatibility and thermal storage stability, which limits its engineering application. To address this issue, this study proposes a prefabricated nano-reinforced rubber–plastic thermoplastic elastomer (TPE) modification strategy. The specific objective was to comparatively investigate how different waste plastic matrices (HDPE, LDPE, and PP) and two representative nano-oxides (ZnO and TiO2) affect the interfacial evolution, storage stability, rutting resistance, fatigue durability, and low-temperature cracking resistance of modified asphalt. The prefabricated nano-reinforced TPE modifier was incorporated into the base asphalt, and its storage stability, interface evolution and multi-scale rheological properties were evaluated. The results show that all modified binders exhibited good thermal storage stability, with softening point differences below 2.5 °C. The enhancement mechanism was mainly governed by physical blending, swelling adsorption, and interfacial synergistic interactions rather than the formation of new chemical functional groups. A clear synergistic matching relationship between plastic type and nanoparticle type was identified. LDPE-based systems showed better phase compatibility and fatigue/low-temperature performance, whereas HDPE-based systems were more favorable with respect to improvement of high-temperature rutting resistance. In addition, ZnO contributed more significantly to storage stability, rutting resistance, and fatigue resistance, while TiO2 was more beneficial for low-temperature crack resistance. These findings provide new insight into the interfacial design of nano-reinforced rubber–plastic modified asphalt and offer guidance for performance-oriented and sustainable pavement materials. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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