Method for determining wax contents in asphalt

Abstract

The invention relates to a method for determining wax contents in asphalt, and belongs to the field of road engineering asphalt quality detection. The method comprises the steps of: preparing a sample, collecting an infrared spectrum of the sample by using an infrared spectrometer, and obtaining an average spectrum figure through an ATR manner; selecting an appropriate spectral segment as a modeling interval, carrying out baseline correction processing and peak processing on the spectrum by utilizing relevant software, and carrying out regression or fitting analysis on data of the modeling interval by using a mathematic method so as to establish a regression model; and predicting wax content in the unknown sample by utilizing the model. The method is low in error rate and is capable of carrying out real-time, in-situ, non-destructive, rapid and quantitative analysis on asphalt wax contents.

Description

technical field [0001] The invention belongs to the field of road engineering asphalt quality detection, and in particular relates to a method for measuring wax content in asphalt. Background technique [0002] Asphalt pavement is widely used in our country because of its excellent road performance and good service performance. As a binder to improve the performance of asphalt pavement, more and more attention has been paid to the performance of asphalt during use, among which wax content, softening point and penetration are the most important. On the one hand, it is because the wax is dispersed in the asphalt after crystallization and precipitation in a low-temperature environment, which reduces the compactness between the asphalt molecules and significantly reduces the low-temperature ductility of the asphalt; Decrease, increase sensitivity to asphalt. Wax can also reduce the adhesion between asphalt and the stone surface, and in the presence of water, it is easy to caus...

AI Technical Summary

Problems solved by technology

The existing standard uses the cracking method to detect the wax content of asphalt. The method is cumbersome, the operation is complicated, and a large amount of toxic solvents are used, which consumes a long time. At the same time, there are human factors in the measurement process, and the repeatability and reproducibility are poor. Therefore, It is not conducive to the rapid detection of asphalt samples, and it is not suitable for quality control analysis in the asphalt production process and road construction process. Therefore, it is of great practical significance to study an accurate, fast, pollution-free and easy-to-operate asphalt detection method

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