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Method and device for detecting bituminous mortar damage self-healing performance

A technology of asphalt mortar and detection device, which is applied in the direction of applying stable tension/compression to test the strength of materials and the preparation of test samples. It can solve the problems of little research on the self-healing mechanism of asphalt and affect the repair effect of asphalt pavement. Achieve the effect of true and accurate detection results, small human error and simple method

Active Publication Date: 2013-01-16
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The self-healing of asphalt materials will directly affect the repair effect of asphalt pavement. At present, the research generally focuses on the effect of the intermittent period on the service life extension of asphalt materials. There is little research on the causes and forms of cracks and the self-healing mechanism of asphalt few

Method used

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  • Method and device for detecting bituminous mortar damage self-healing performance
  • Method and device for detecting bituminous mortar damage self-healing performance
  • Method and device for detecting bituminous mortar damage self-healing performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] see figure 1 , the device of the present embodiment consists of a constant temperature box 1, a heating device 2, a base plate 3, a left fixed baffle 4, a frame 5, a scale 6, a displacement sensor 7, a fixed fixture 8, a movable fixture 9, a movable baffle 10, and a telescopic rod 11. Right fixed baffle 12, temperature sensor 13, cooling device 14, data acquisition unit 15, control unit 16, computer 17, temperature control unit 18, stress sensor 19 and power unit 20 are connected to form.

[0029] A heating device 2 is arranged at the bottom of the incubator 1, a bottom plate 3 is installed above the heating device 2 in the incubator 1, and a cooling device 14 is arranged on the side wall of the incubator 1, and the test piece is placed in advance when the test piece is detected. Heat the bottom plate 3 to 5°C and keep it warm. A temperature sensor 13 is installed on the top of the incubator 1 to sense the temperature in the incubator 1 and transmit it to the data acqui...

Embodiment 2

[0043] In this embodiment, when the detection device for self-healing property of asphalt mortar damage in Example 1 is used for self-healing detection, the specific steps are as follows:

[0044] (1) Same as Example 1.

[0045] (2) Adjust the temperature of the incubator 1 to 40°C through the temperature control unit 18 and the heating device 2, fix the two small cylinders through the above-mentioned fixed fixture 8 and movable fixture 9 respectively, set parameters through the computer 17, and the computer 17 sends a command to the control unit 16 to control the power unit 20 to act. After the power unit 20 starts, it pushes the movable clamp 9 to move towards the fixed clamp 8, and applies a constant pressure of 0.1 MPa to the two small cylinders. During the action process, the two small cylinders will press each other to produce self-healing, and the self-healing time will be up to 8 hours. After the power device 20 stops applying pressure, the two small cylinders will sel...

Embodiment 3

[0054] In this embodiment, when the detection device for self-healing property of asphalt mortar damage in Example 1 is used for self-healing detection, the specific steps are as follows:

[0055] (1) Same as Example 1.

[0056] (2) Adjust the temperature of the incubator 1 to 70°C through the temperature control unit 18 and the heating device 2, fix the two small cylinders through the above-mentioned fixed fixture 8 and movable fixture 9 respectively, set parameters through the computer 17, and the computer 17 sends a command to the control unit 16 to control the power unit 20 to act. After the power unit 20 starts, it pushes the movable clamp 9 to move towards the fixed clamp 8, and applies a constant pressure of 0.1 MPa to the two small cylinders. During the action process, the two small cylinders will press each other to produce self-healing, and the self-healing time will be up to 4 hours. After the power device 20 stops applying pressure, the two small cylinders will sel...

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Abstract

The invention relates to a method and a device for detecting bituminous mortar damage self-healing performance. The method includes pressing two bituminous mortar test samples for a while to form a self-healing test piece; stretching the self-healing test piece unidirectionally at the same strain rate; and determining change situation of tensile strength of the test piece since the test piece is healed by itself so as to evaluate self-healing performance of the bituminous mortar. By the method, self-healing performance of bituminous mortar can be evaluated quantitatively. As the corresponding device for detecting bituminous mortar damage self-healing performance is provided, defect in research on self-healing performance of bituminous and mixture thereof is overcome. In addition, the method can be used for detecting bituminous mortar test pieces with different proportions, the self-healing process of bituminous mortar can be simulated vividly on conditions of different test temperature, healing time and pressure, the method is simple and practical, the device is simple in structure, the whole detecting process can be controlled by computers, personal error is low, and detecting results are real and accurate.

Description

technical field [0001] The invention belongs to the application technical field of rheological characteristic detection of asphalt mortar, and in particular relates to a detection device and a detection method for the damage self-healing property of asphalt mortar. Background technique [0002] With the vigorous development of expressway construction, the corresponding demand for road construction materials has increased, thus putting forward higher requirements for material performance. Judging from the current situation, the asphalt pavement in our country is seriously damaged in the early stage of the service design period and requires frequent maintenance and repairs. Therefore, how to effectively modify and enhance the use quality of asphalt pavement to prolong the service life of the road and reduce related maintenance and repair costs seems to be a problem. especially urgent. [0003] At the same time, the problem of damage to asphalt pavement of high-grade highways ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N1/28
Inventor 裴建中赵晓康常明丰任仲山杜群乐杨彤
Owner CHANGAN UNIV
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