石墨尾矿掺量对沥青胶浆性能的影响

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中图分类号：U414 文献标志码：A 文章编号：1008-0562（2026）01-0034-08

Effect of graphite tailings content on the properties of asphalt mastic

LIQuishi'， LUO Xuanpei'，HANDan² （1.SchoolofCiviland Transportation Engineering，NortheastForestry University，Harbin 15o040，China; 2.Institute ofEngineering Technology，Heilongjiang College of Ecological Engineering， Harbin150025，China）

Abstract：Aiming atthe dual needs of resource utilization of graphite tailings and sustainable replacement of road engineering fillrs，the influence mechanism and optimal dosage of graphite tailings partiallyreplacing limestone powder on the performance of asphalt mortar were studied.The microstructure of graphite tailings and limestone powder was analyzed by scanning electron microscopy （SEM）.The asphalt mastic with diferent content of graphite tailings was prepared，and the high temperature rheology，low temperature rheologyand fatigue resistance test were carred out.The results show that when the substitution rate of graphite tailings is 25% ，the high temperature performance of asphalt mortar is improved.Compared with limestone asphalt mastic，the Brinell viscosity of graphite tailings asphalt mortar at 135∘C increased by 83.3% ，thedynamic shear rheological rut factor at 46°C increased by 63.2% ，and the peak stress measured by linear amplitude scanning test increased by 32.6% . SEM microscopic analysis shows that the edges of graphite tailings are mostly irregularly serrated and the surface is rough，which can enhance the strength of asphalt-filer interface.The addition of graphite tailings leads to the attenuation of the low temperature performance of asphalt mortar.At -18°C ，the creep stiffness increases by 17.7% and the creep rate decreases by 22% compared with limestone asphalt mortar.The research conclusions provideabasis for the high-value utilization of graphite tailings and the development ofsustainable road materials.

Keywords：road construction; graphite tailings; content; asphalt mastic;mobility;microscopic morphology;antifatigue performance

0引言

能的影响，确定石墨尾矿的最佳摻量。（剩余12848字）