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Detection device and method for self-healing property of asphalt

A detection device and self-healing technology, applied in measurement devices, flow characteristics, instruments, etc., can solve the problems of cumbersome evaluation process, difficult to popularize and popularize, and high operation requirements, and achieve simple detection steps, accurate detection, easy effect of operation

Active Publication Date: 2012-12-26
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although this method can evaluate the self-healing performance of asphalt to a certain extent, the evaluation process is cumbersome and has high requirements for operation, so it is difficult to popularize

Method used

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  • Detection device and method for self-healing property of asphalt
  • Detection device and method for self-healing property of asphalt
  • Detection device and method for self-healing property of asphalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] see figure 1 , the asphalt self-healing detection device of the present embodiment consists of a base 1, a support 2, a constant temperature water bath 3, a torsional shear mechanism 4, a sample container 5, a rotating rod 6, a rotational speed sensor 7, a power unit 8, a torque sensor 9, a temperature The sensor 10, the speed control unit 11, the A / D converter 12, the computer 13, the temperature control unit 14, the heater 15 and the support base 16 are connected to form.

[0035] A constant temperature water bath box 3 is placed on the base 1 and a rectangular support 2 is also fixed by threaded fasteners. The rectangular support 2 is supported on the top of the constant temperature water bath box 3, and a heater 15 and temperature are installed in the constant temperature water bath box 3. The sensor 10 is also equipped with a support base 16 at the bottom of the constant temperature water bath box 3, and a sample container 5 that is filled with a common asphalt sam...

Embodiment 2

[0054] In this embodiment, the torsional shear mechanism 4 includes a central torsional shear bar 4-3 and two auxiliary torsional shear bars 4-1 arranged on the outer edge of the central torsional shear bar 4-3, and two auxiliary torsional shear bars 4-1 Evenly distributed on the same circumference, the center of the circle is on the central axis of the central torsional shear rod 4-3, the rod bodies of the central torsional shear rod 4-3 and the auxiliary torsional shear rod 4-1 are cylindrical, and the end of the rod body is conical , the radius of the body of the central torsional shear bar 4-3 is 2.5 cm, the radius of the body of the auxiliary torsional shear bar 4-1 is 1 cm, and the two auxiliary torsional shear bars 4-1 are evenly distributed on the same axis as the central torsional shear bar 4-3 On the same circumference, the wall of the auxiliary torsional shear bar 4-1 is 1.5cm from the wall of the central torsional shear bar 4-3, and the side wall of the auxiliary to...

Embodiment 3

[0057] In this embodiment, the torsional shear mechanism 4 includes a central torsional shear bar 4-3 and two auxiliary torsional shear bars 4-1 arranged on the outer edge of the central torsional shear bar 4-3, and two auxiliary torsional shear bars 4-1 Evenly distributed on the same circumference, the center of the circle is on the central axis of the central torsional shear rod 4-3, the rod bodies of the central torsional shear rod 4-3 and the auxiliary torsional shear rod 4-1 are cylindrical, and the end of the rod body is conical , the radius of the body of the center torsional shear bar 4-3 is 2.5cm, the radius of the body of the auxiliary torsional shear bar 4-1 is 1.5cm, and the two auxiliary torsional shear bars 4-1 are evenly distributed on the same side as the center torsional shear bar 4-3. On the same circumference of the shaft, the wall of the auxiliary torsional shear bar 4-1 is 2.5 cm from the wall of the central torsional shear bar 4-3, and the side wall of the...

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Abstract

The invention relates to a detection device and method for self-healing property of asphalt. A fixed shear rate is applied to the asphalt through a reduced order test of an equal shear rate; after the asphalt is in a stable state, the shear rate is abruptly reduced; a variation process in which the torque of the asphalt is gradually restored in a period of time after detection until the corresponding recovery rate is balanced, so that the self-healing coefficient of the asphalt is calculated, the self-healing capacity of the asphalt can be directly reflected, the corresponding detection steps are simple and convenient and are easy to operate, the defects in self-healing research of the asphalt and a mixed material thereof are overcome; and according to the detection method provided by the invention, the self-healing property evaluation of the asphalt can also be modified, meanwhile, a plurality of reduced order tests can be performed according to specific requirements, and the continuous healing effect of the asphalt material is researched. The detection device has a simple structure and is convenient to operate, the self-healing process of the asphalt can be truly simulated, and the self-healing property of the asphalt can be accurately detected.

Description

technical field [0001] The invention belongs to the research field of viscoelastic properties of asphalt, and in particular relates to a detection device and a detection method for asphalt self-healing property. Background technique [0002] A self-healing material is a material that can repair itself partly damaged during service. Researchers have long discovered that asphalt materials have the ability to heal themselves. Many studies have shown that asphalt materials can achieve self-healing during the intermittent period and when the ambient temperature is high, and the modulus will continue to recover as the intermittent time increases, automatically extending the service life of the pavement. Self-healing can reflect the recovery ability of asphalt performance. Therefore, for asphalt roads, it is important to ensure that the pavement materials and structures have good self-healing ability, and can actively and automatically repair the cracks and damaged parts of the a...

Claims

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Application Information

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IPC IPC(8): G01N11/16
Inventor 裴建中李彦伟赵晓康杜群乐包得祥贾传峰
Owner CHANGAN UNIV
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