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Method for evaluating high-temperature performance of modified asphalt

A technology of high temperature performance and modified asphalt, applied in the direction of flow characteristics, measuring devices, instruments, etc., can solve the problems of poor consistency of test results, ambiguous evaluation indicators, and inability to truly analyze the high temperature performance of modified asphalt.

Inactive Publication Date: 2019-07-23
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

However, the ZSV test is very labor-intensive and time-consuming, and the consistency of test results using different methods is very poor, so it is difficult to promote
[0012] From the above research results, it can be seen that the current high-temperature performance tests of modified asphalt binder are mainly penetration test, softening point test and dynamic shear rheological test, and the evaluation index of high-temperature performance of modified asphalt is still based on the results of the above three tests It is calculated, but the evaluation index is ambiguous, and it cannot truly analyze the high temperature performance of modified asphalt

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  • Method for evaluating high-temperature performance of modified asphalt

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Embodiment Construction

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0038] The present invention takes BRA modified asphalt as an example to illustrate the technical concept of the present invention:

[0039] 1. Preparation of BRA modified asphalt

[0040] In the present invention, the dosage of Buton rock asphalt adopts 6 dosages such as 0, 5%, 10%, 15%, 20% and 25% (all are the ratio of pure asphalt and base asphalt of BRA rock asphalt), and the concrete preparation The process is as follows:

[0041] (1) Sieve the Buton r...

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Abstract

The invention discloses a method for evaluating high-temperature performance of modified asphalt. According to the analysis method, the high-temperature shear rheological performance of the modified asphalt is analyzed from a new angle, and then the high-temperature performance of the modified asphalt can be researched more accurately and more scientifically. The accuracy of the analysis method isfurther verified through tests such as needle penetration and equivalent softening points.

Description

technical field [0001] The invention relates to the technical field of road engineering, in particular to a method for evaluating the high-temperature performance of modified asphalt. Background technique [0002] The penetration classification method has been adopted in my country's road asphalt technical standards, and is a typical empirical standard. Up to now, there are two types of classification standards for road asphalt, namely, penetration classification and viscosity classification. These two classification methods are still used by most countries and institutions. Although the viscosity grading standard has improved compared with the penetration grading standard, it is still empirical. Regarding the evaluation method of high-temperature performance of modified asphalt, there has been no unified standard in the world. Countries basically follow the evaluation method of ordinary asphalt, and evaluate the high-temperature performance of modified asphalt with two ind...

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Application Information

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IPC IPC(8): G01N11/00
CPCG01N11/00
Inventor 吕松涛张乃天鲁巍巍贺芳伟侯贵
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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