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Asphalt pavement load temperature coupling testing device and testing method thereof

A technology of asphalt pavement and test device, which is applied in the direction of measuring device, strength characteristics, preparation of test samples, etc., to achieve the effects of good test stability, high test accuracy and high degree of automation

Active Publication Date: 2014-03-19
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Most of the existing evaluations on the coupling effect of road load temperature coupling use the finite element method for simulation analysis, which cannot measure and quantify the road load temperature coupling effect.

Method used

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  • Asphalt pavement load temperature coupling testing device and testing method thereof
  • Asphalt pavement load temperature coupling testing device and testing method thereof
  • Asphalt pavement load temperature coupling testing device and testing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] in figure 1 In this embodiment, the test device for load temperature coupling effect of asphalt pavement is composed of cantilever beam 1, hydraulic cylinder 2, pressure plate 3, air intake fan 4, variable resistor 5, programmable controller 6, electronic thermometer 7, right bracket 8, computer 9. The stress sensor 10, the temperature isolation box 11, the left bracket 12, the test piece table 13, the test piece holding box 14, the exhaust fan 15, the heating plate 16, and the solenoid valve 18 are connected.

[0038] A test piece table 13 is placed at the bottom of the temperature isolation box 11. The left side of the test piece table 13 is fixedly connected with a left bracket 12 with a threaded fastening connector, and the right side of the test piece table 13 is fixedly connected with a threaded fastening connector. Right bracket 8, the left end of the cantilever beam 1 is fixedly connected to the left bracket 12 with a threaded fastening connector, the right end of ...

Embodiment 2

[0064] The test piece container 14 is also placed on the test piece table 13. The test piece container 14 is an open container on the upper surface, and the test piece container 14 is used to place the test piece 17 and 12 stress sensors are laid in the test piece 17 10. The stress sensor 10 is arranged in three layers in the test piece 17 with a layer spacing of 5 cm, 4 in each layer horizontally and 3 vertically, uniformly arranged. The stress sensor 10 is connected to the computer 9 through a wire.

[0065] The other parts and the connection relationship and working principle of the parts are the same as in the first embodiment.

[0066] The method of using the above-mentioned asphalt pavement load-temperature coupling effect test device to carry out the asphalt pavement load-temperature coupling effect test is the same as in Example 1.

Embodiment 3

[0068] The test piece container 14 is also placed on the test piece table 13. The test piece container 14 is an open container on the upper surface. The test piece container 14 is used to place the test piece 17, and 9 stress sensors are laid in the test piece 17 10. The stress sensor 10 is arranged in three layers in the test piece 17 with a layer spacing of 4 cm, each layer is arranged 3 horizontally and 3 longitudinally, uniformly arranged. The stress sensor 10 is connected to the computer 9 through a wire.

[0069] The other parts and the connection relationship and working principle of the parts are the same as in the first embodiment.

[0070] The method of using the above-mentioned asphalt pavement load-temperature coupling effect test device to carry out the asphalt pavement load-temperature coupling effect test is the same as in Example 1.

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Abstract

The invention discloses an asphalt pavement load temperature coupling testing device and testing method thereof. The method comprises the following steps: uniformly heating a test piece to be tested by adopting a heating plate, applying pressure to the test piece to be tested through a hydraulic cylinder, and controlling an air inlet fan, an exhaust fan and the heating plate through a computer, so that the temperature is in sine curve change during test; and recording the stress change of each point inside the test piece to be tested under load and temperature changes though a stress sensor embedded inside the test piece to be tested. The experiment is carried out through step-related experimental conditions, the experimental result is compared to determine a coupling effect of the asphalt pavement load temperature, the experimental device is reasonable in structure, high in testing accuracy and high in testing stability, and the test method is clear in steps, simple in operation and high in degree of automation.

Description

Technical field [0001] The invention belongs to the technical field of equipment or devices for testing stress on newly-built pavements and completed pavements, and specifically relates to a test device and a test method for the load-temperature coupling effect of an asphalt pavement. Background technique [0002] Asphalt mixture is the most commonly used surface layer material in pavement paving, and it directly bears the repeated action of traffic load. At the same time, asphalt mixture is a temperature-sensitive material whose performance depends heavily on the ambient temperature. When the external environment changes, unstable heat flow is generated in the road surface, which constitutes the temperature field of the road structure. Under the action of the cyclically changing temperature field, a large temperature stress will be generated inside the asphalt pavement. Coupled with the repeated action of the traffic load, when the overall strength of the base layer is low, a l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G01N1/28G01N3/02
Inventor 李蕊王凯马伟思任仲山陆瑞国刘虎军张梦丽杜慧黎宇阳贺明明刘乙丁孙昌乐
Owner CHANGAN UNIV
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