考虑微观形貌的纳米填料增强沥青混合料性能研究

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中图分类号：TQ522.65 文献标志码：A 文章编号：1001-5922（2025）07-0068-04

Study on the performance of nano-filler enhancing asphalt mixture considering microscopic morphology

YANG Hanming （Sujiaoke Group Co. ，Ltd.，Nanjing 210017，China）

Abstract：Domestic A7O# straight-run asphalt and industrial-grade multi-walled carbon nanotubes were selected as the main materials，and the nanofiller reinforced asphalt mixture specimens with mass fractions of 0.3%，0.5% ， 0.7% and 1.0% were prepared，respectively，and the mechanical properties and road properties of the material specimens were studied.The results showed that theaddition of nano-filler to asphalt mixture would play an obvious rolein bridging and strengthening in the microscopic morphology of the fault area.The average indirect tensile strength of specimen No.4 with a nanofiller mass fraction of 1.0% was 1.91 MPa，the indirect tensile strength ratio was O.83 before and after freezing and thawing，and the rutting depth reached -16.1 mm after 20 000 loads. The dynamic modulus value of the specimen was the lowest in the high-frequencyenvironmentand the highest in the low-frequency condition，which proves that itsperformanceisbeter than thatofother specimensinall aspects. When the mass fraction of nanomaterials was 0.7% ，the nanofiller reinforced asphalt mixture had the best tensile properties，viscoelastic properties，low-temperature crack resistance and water damage resistance.

Keywords：microscopic morphology;nano filers;asphalt mixture;preparation;mechanical properties;road performance

纳米填料作为一种新型的增强材料，被广泛应用于沥青混合料的改性中，能够有效改善沥青的微观结构[1]。（剩余5272字）