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An experimental device and test method for evaluating the high-temperature performance of drainage asphalt pavement under the action of multi-field coupling

A drainage asphalt, high-temperature performance technology, applied in the direction of applying stable tension/pressure to test material strength, measuring devices, strength characteristics, etc., can solve problems such as dynamic changes in temperature field

Active Publication Date: 2019-06-04
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This test method uses a constant temperature field and only considers a single saturated hydraulic field, but the pavement is not always in a saturated state
Secondly, changes in the hydraulic field will lead to dynamic changes in the temperature field, not a constant temperature field, which was not considered in previous studies

Method used

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  • An experimental device and test method for evaluating the high-temperature performance of drainage asphalt pavement under the action of multi-field coupling
  • An experimental device and test method for evaluating the high-temperature performance of drainage asphalt pavement under the action of multi-field coupling

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Example 1: High temperature performance evaluation of multi-field coupling under rainfall saturation

[0033] Such as figure 1 Shown: An experimental device for evaluating the high-temperature performance of drainage asphalt pavement under the action of multi-field coupling, including a loading bar 1, a universal testing machine column 2, a working box 3, a pressure head 4, a piezometric tube 5, and a water pressure dissipation device 6 , flaring and drainage port 7, heater 8, drainage asphalt mixture test piece 9, temperature control device 10, water outlet 11, cement stabilized gravel pad 12, fixing device 13, workbench 14 and universal testing machine environment box 15 ;

[0034] The universal testing machine environment box 15 is provided with a workbench 14, and the workbox 3 is installed on the workbench 14 through a fixing device 13. A cement stabilized crushed stone pad 12 is placed at the bottom of the workbox 3, and the cement stabilized crushed stone A dra...

Embodiment 2

[0045] Example 2: High temperature performance evaluation of rainfall unsaturated multi-field coupling effect

[0046] Steps 1-6: Same as Steps 1-6 in Example 1.

[0047] Step 7: After the loading of the universal testing machine starts, open the water outlet 11 until the water level is lower than the bottom of the test piece, store the water in the container, place the container in the universal testing machine environmental chamber 15, and keep the temperature at the required temperature. When the water level is lower than the bottom of the test piece, close the water outlet 11 and start timing. After 20 minutes, pour the previously saved water into the working box 3 at one time, open the water outlet 11 at the same time, repeat the above work, and cycle in turn until the end of the test.

[0048] Step 8: Observe the change of the height of the water head in the piezometric tube, and take the maximum change range as the measured value of the hydrodynamic pressure.

[0049]...

Embodiment 3

[0050] Example 3: High temperature performance evaluation of multi-field coupling effect of rainwater fading

[0051] Steps 1-6: Same as Steps 1-6 in Example 1.

[0052] Step 7: After the loading of the universal testing machine starts, open the water outlet 11 until the water level is lower than the bottom of the test piece 9, and then close the water outlet 11. Observe the change of the height of the water head in the piezometric tube during this process, and take the maximum change range as the measured value of the hydrodynamic pressure. Until the end of the test, the high temperature performance evaluation is carried out according to the data recorded by the universal testing machine.

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Abstract

The invention discloses an experimental apparatus and a test method for evaluating the high temperature performance of a drainage asphalt pavement under a multi-field coupling effect. The experimental apparatus comprises a dynamic loading device, a working box, a pressure measurement device, a water pressure dissipation device, a temperature control device, a water outlet and a fixation device. With the experimental apparatus of the present invention, the high temperature performance of the drainage asphalt pavement under the common dynamic change of the dynamic stress field, the temperature field and the hydraulic field can be evaluated, the dynamic water pressure of the drainage asphalt pavement under the dynamic load effect can be measured, and the difference of the high temperature performance of the drainage asphalt pavement during the rainfall process can be simulated; and the experimental apparatus and the test method can be used for the research of the damage on the drainage asphalt pavement in the actual use environment, and have good simulation effects.

Description

technical field [0001] The invention relates to an experimental device and a test method for studying the high-temperature performance evaluation of the drainage asphalt pavement subjected to the actual multi-field coupling action, and can be used for measuring the dynamic water pressure of the pavement, belonging to the field of road engineering. Background technique [0002] With the continuous accumulation of road construction experience in our country, people have put forward higher requirements for the quality of road surfaces, including improving the safety, comfort, and environmental coordination of road surfaces. Research data at home and abroad show that the accident rate of expressways in rainy days is 6 to 10 times that in sunny days, mainly due to the reduction of the anti-skid performance of the road surface caused by rainy days, and the serious accidents caused by water drift and water mist caused by road surface water. Drainage pavements are widely used in Jap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N3/18
CPCG01N3/18G01N2203/0019G01N2203/0048G01N2203/0226
Inventor 王晓威顾兴宇
Owner SOUTHEAST UNIV
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