Experimental Study on Effect of Road Performance, Using Carbon Nano materials/SBS as Modified Asphalt

Abstract

The development and utilization of high-performance polymer modified asphalt is an important mean to improve the resistance ability of asphalt pavement, prolong the life of pavement by reducing the maintenance cost. The development of carbon nanomaterials provides more possibilities for modified asphalt technology. In order to explore the road performance of carbon nanomaterial modified asphalt mixture, five kinds of carbons were prepared under high speed shearing method: 0.1 Wt.%, 0.3 Wt.%, 0.6 Wt.%, 1 Wt.%, 2 Wt.%. The modified asphalt with nanomaterial content was studied by the comparative analysis of the basic performance indexes of base asphalt and five modified asphalts to study the compatibility between carbon nanomaterials and base asphalt. The modified asphalt with 0.3 Wt.%, 1 Wt.% and 2 Wt.% was used as the research object. The traditional carbon nanomaterials and optimized carbon nanomaterials were analyzed by macroscopic mechanics, microstructure and chemical composition. Based on the basic technical indicators and the macroscopic properties of the mixture, the formation mechanism of the microstructure and macroscopic properties of the carbon nanomaterial/SBS modified asphalt was explained by Scanning Electron Microscopy (SEM), fluorescence microscopy and infrared spectroscopy (FTIR). The results show that the optimum content of carbon nanomaterials is 1%, and the high and low temperature properties and storage stability of the modified asphalt are improved under the optimal dosage. The optimized carbon nanomaterials have become a bridge between SBS and asphalt due to their microscopic cyclic structure and conjugated bonds. The good microscopic compatibility with asphalt is the key to improving the modification performance.