Research method of aging performance of modified asphalt based on gray relational method

Abstract

The invention discloses a modified asphalt aging property research method based on the grey association method, which includes the following steps: firstly, the changes of molecular weight and distribution before and after the aging of modified asphalt are calculated; the calculation of grey association method parameters is then carried out; secondly, a grey association entropy analysis about the influences of the changes of molecular weight and distribution on the change of macro-property indexes of the modified asphalt is carried out; secondly, the orders of the influences of the changes of molecular weight and distribution on aging property are determined; and finally, the main influence factors of the aging resistance of stress-absorbing layer modified asphalt binder are determined, providing a reference for the control of the quality of the stress-absorbing layer asphalt binder. By means of an advanced analysis means, beginning from the micro-composition of the asphalt, the invention is intended to research the relation between the macro-properties and micro-structure change of the asphalt and essentially research the aging mechanism of the asphalt to ensure the quality of the road stress-absorbing layer asphalt binder in use and provide a reference for the control of the quality of the stress-absorbing layer asphalt binder.

Description

Technical field [0001] The invention belongs to the technical field of road engineering, and relates to a method for studying the aging performance of road stress absorbing layer modified asphalt, in particular to a method for studying the aging performance of road stress absorbing layer modified asphalt based on a gray correlation method. Background technique [0002] Grey relational analysis method, referred to as grey relational method, is an effective method for analysis of poor information systems. It is based on the micro or macro geometric closeness of the behavior factor sequence, analyzes the degree of influence between factors, distinguishes the main and minor factors, and determines the influence of the factors on the main behavior Effective method of contribution measurement. Its purpose is to quantify and sequence the factors of incomplete information and a few uncertain systems, and then analyze it from a micro perspective. [0003] Highways play a pivotal role in th...

AI Technical Summary

Problems solved by technology

Although road workers in our country are also actively exploring and researching on improving the performance and durability of pavement, they have a relatively deep understanding of the changes in the physical properties of asphalt after aging under the action of natural factors. The level of technical analysis needs to be further improved

[0004] The composition of asphalt is very complex, and most of the current technologies focus on the relationship between the change of asphalt components and the change of asphalt macroscopic properties, which has certain limitations for the study of asphalt aging mechanism

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