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Method for evaluating shape memory performance of gutta-percha modified asphalt

A technology of modified asphalt and evaluation method, which is applied in the field of asphalt pavement materials, and can solve the problems of lack of characterization methods, difficulty in determining the best formula of eucommia gum modified asphalt, and singleness

Inactive Publication Date: 2019-10-18
NANJING FORESTRY UNIV
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Problems solved by technology

[0009] The purpose of the present invention is to provide an evaluation method for the shape memory performance of eucommia gum modified asphalt, to solve the single test method and lack of characterization methods for the shape memory performance of eucommia gum modified asphalt at present, and it is difficult to determine the eucommia gum with shape memory performance Optimum formulation of modified asphalt

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  • Method for evaluating shape memory performance of gutta-percha modified asphalt

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Embodiment Construction

[0021] The invention provides a method for evaluating the shape memory performance of eucommia gum modified asphalt, and the specific implementation steps are as follows:

[0022] (1) Prepare eucommia gum-modified asphalt, process it into a cuboid specimen with a length of 15 mm, a width of 15 mm, and a height of 60 mm, and properly lubricate the upper inner edge of the middle part of the torsion test device for testing shape memory performance to reduce friction , to facilitate the rotation of the upper part, and place the specimen in the groove of the torsion test device for testing the shape memory performance;

[0023] (2) Hold the upper rotating handle at room temperature and rotate slowly. When the upper part (top cover) of the device rotates to a certain angle, stop the rotation, and insert the fixing rod from the upper part (top cover) of the device through the middle part (sleeve) of the device. Fix it in the socket of the fixing rod, and record the torsion angle θ of...

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Abstract

The invention relates to a method for evaluating shape memory performance of gutta-percha modified asphalt, belongs to the technical field of asphalt pavement materials and aims to solve the problemsthat the existing method for testing the shape memory property of gutta-percha modified asphalt is single, the characterization method is lacked, the related test operation is complicated and the optimal formula is difficult to determine. The method comprises the following steps of firstly, preparing gutta-percha modified asphalt, and processing the gutta-percha modified asphalt into a cuboid testpiece; then, testing by using a torsion device for testing the shape memory performance, and measuring the torsion angle of the gutta-percha modified asphalt after different operation steps from torsion to recovery; and finally, calculating the fixation rate and the recovery rate of the gutta-percha modified asphalt, evaluating the shape memory performance of the gutta-percha modified asphalt, and further optimizing the formula and the preparation process of the gutta-percha modified asphalt according to the evaluation. The shape memory performance evaluation method provided by the inventionnot only solves the problem that the shape memory performance test method of the gutta-percha modified asphalt is lacked at present, but also enriches the shape memory performance evaluation method ofa shape memory polymer.

Description

technical field [0001] The invention relates to an evaluation method for the shape memory performance of eucommia gum modified asphalt, which belongs to the technical field of asphalt pavement materials. Background technique [0002] In recent years, due to the development of science and technology and application requirements, various new materials have been vigorously developed. Shape memory polymers have been widely used in many fields because of their excellent shape memory effect. Studies have found that shape memory polymers have a two-phase structure, that is, a stationary phase that remembers the initial shape and can reversibly solidify and soften with temperature changes. the reversible phase. Among them, the cross-linked structure of the polymer, the partial crystalline structure, the glassy state of the polymer, the entanglement of ultra-high molecular chains, etc. are the stationary phases, and the partial crystalline phase with reversible changes in crystalliz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/42G01N3/22
CPCG01N3/22G01N33/42G01N2203/0003G01N2203/0021G01N2203/0641G01N2203/0682
Inventor 李宁许涛许俊杰袁峻
Owner NANJING FORESTRY UNIV
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