To investigate the effect of graphene on the fatigue properties of base asphalt mastics, graphene nanoplatelets (GNPs)-modified asphalt mastics and base asphalt mastics were prepared. A dynamic shear rheometer (DSR) was used to conduct the tests in the stress-controlled mode of a time-sweep test. The results showed that GNPs can improve the fatigue life of asphalt mastic. Under a stress of 0.15 MPa, the average fatigue life growth rate ($\overline{\omega }$) was 17.7% at a filler-asphalt ratio of 0.8, 35.4% at 1.0, and 45.2% at 1.2; under a stress of 0.2 MPa, the average fatigue life growth rate ($\overline{\omega }$) was 17.9% at a filler-asphalt ratio of 0.8, 25.6% at 1.0, and 38.2% at 1.2. The growth value (ΔT) of fatigue life of GNPs-modified asphalt mastics increased correspondingly with the increase of filler–asphalt ratio, the correlation coefficient R² was greater than 0.95, and the growth amount showed a good linear relationship with the filler–asphalt ratio. In the range of 0.8~1.2 filler–asphalt ratio, the increase of mineral powder can improve the fatigue life of asphalt mastics, and there is a good linear correlation between filler–asphalt ratio and fatigue life. The anti-fatigue mechanism of GNPs lies in the interaction between GNPs and asphalt, as well as its own lubricity and thermal conductivity.

Large-scale comprehensive utilization of industrial solid waste is a worldwide problem. The application than the fly ash and the carbide slag are used as road construction materials is a comprehensive utilization method of large amount consumption of industrial solid waste. Combined the physical and chemical properties of fly ash and carbide slag, the changes of compressive strength, flexural strength and elasticity modulus of different cement content are studied. Considered the climatic conditions and traffic conditions of rural road in Three Gorges reservoir area, the impermeability, the frost resistance, the wear resistance, the dry shrinkage and the thermal shrinkage of fly ash-carbide slag residue concrete are analyzed. The results indicate that the fly ash-carbide slag residue concrete has good road performance and can meet the requirements of road construction in Three Gorges reservoir area; It provides a new method for the solid waste disposal, the environmental protection and rural road construction in Three Gorges reservoir region.