Influence of Carbon Primary Nano Materials in Polymer Modified Binders on the Temperature Sensitivity of Asphalt Concrete During Operation

Abstract

The influence of the content of single-walled carbon nanotubes on the basic physical and mechanical properties of polymer-bitumen binders is studied. The effect of nanomodifiers on the morphostructural features of polymer-bitumen binders was studied using optical methods and fluorescence microscopy. The rational content of the modifying additive (0.0001 %) in the composition of the binder, which ensures the achievement of the specified parameters, is established. The influence of single-walled carbon nanotubes on morphostructural features is established. the nanomodifier initiates the processes of structuring interfacial layers, which leads to strengthening of physical bonds between the polymer macromolecules and the dispersed phase of the organic binder, which naturally affects the improvement of heat resistance, adhesive and cohesive strength of the binder. The study of polymer-bituminous binder films allowed us to record that when the nanomodifier is introduced, the polymer macromolecules decrease and their distribution over the binder volume is more uniform, which ensures its stability. It was found that the introduction of a rational amount of nanomodifier allows you to expand the required temperature range of asphalt concrete pavement performance by 25-34 %, while reducing the polymer content by 38 %.