Microstructure analysis method of asphalt and modifier thereof

Abstract

The invention relates to a microstructure analysis method of asphalt and a modifier thereof, and belongs to the technical field of microstructure analysis of modified asphalt. The problem that the microstructures of asphalt and the modifier thereof cannot be comprehensively, stereoscopically and clearly analyzed by using only one characterization method at present is solved. According to the microstructure analysis method provided by the invention, neutron small-angle scattering samples of an SBS modifier, matrix asphalt and SBS modified asphalt are prepared at first, a neutron small-angle scattering test is performed on the samples to obtain initial experimental data, and the initial experimental data are processed to obtain an absolute intensity scattering curve, and then different models are fitted through the absolute intensity scattering curves of the samples to quantitatively analyze the microstructures of the SBS modifier, the matrix asphalt and the SBS modified asphalt. Throughthe analysis of the microstructures of the asphalt and the modifier thereof, the modification mechanism of the SBS modified asphalt can be better revealed, and a relationship between the microstructure of the modified asphalt and the macroscopic properties thereof can be established, so that the performance of the SBS modified asphalt, and the service level and the service life of asphalt pavements can be better improved.

Description

technical field [0001] The invention relates to a microstructure analysis method for asphalt and its modifier, and belongs to the technical field of microstructure analysis of modified asphalt. Background technique [0002] Asphalt is the main material for road construction. Compared with cement pavement, asphalt pavement has the advantages of comfortable driving, stable and low noise, and convenient maintenance. It is the first choice for highway construction in various countries. In recent years, my country's economy has achieved rapid development, urban car ownership has increased rapidly, and expressway traffic volume has increased year by year, which has brought new challenges to the use of roads at all levels, especially for the performance of asphalt pavement on high-grade highways. The requirements are becoming stricter and stricter, but asphalt pavement is prone to oil flooding in high temperature seasons and cracking in low temperature seasons, which affects the ser...

AI Technical Summary

Problems solved by technology

[0011] The invention provides a method for analyzing the microstructure of asphalt and its modifier. The method studies the microstructure of modified asphalt from the perspective of studying the nanoscale structure of matrix asphalt and SBS block copolymer, thereby solving the current problems. The use of OM microstructure characterization is insufficient; SEM and TEM can only observe local information; AFM can only detect the microstructure of the surface, which solves the problem that only one characterization method cannot be comprehensive, three-dimensional, clear, quantitative, and accurate. Problems in analyzing the microstructure of asphalt and its modifiers