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Experimental device used for evaluation of water stability of bituminous mixture and experimental method

A technology of asphalt mixture and water stability, which is applied in the direction of applying stable tension/pressure to test material strength, measuring devices, and using repeated force/pulsation force to test material strength, etc., which can solve the problem of water environment. Problems such as the difference in the use state of asphalt mixture

Inactive Publication Date: 2017-04-26
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The indirect tensile fatigue test can evaluate the fatigue life of asphalt mixture under the influence of water, but this test method cannot be carried out in the environment with water, and there are still differences with the actual use state of asphalt mixture

Method used

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  • Experimental device used for evaluation of water stability of bituminous mixture and experimental method
  • Experimental device used for evaluation of water stability of bituminous mixture and experimental method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Example 1: Indirect Tensile Test Evaluation of Water Stability

[0037] Using the above experimental device, the indirect tensile test was used to evaluate the water stability of asphalt mixture under multi-field coupling, including the following steps:

[0038] Step 1: According to the designed gradation and the amount of asphalt, use a gyratory compactor or a Marshall compactor to form a cylindrical asphalt mixture specimen 5 with a height of 100mm and a diameter of 63.5mm, and measure the height h and diameter d of the specimen , calculate the cross-sectional area A of the test piece, and keep it at room temperature for 24 hours for later use.

[0039] Step 2: The bottom of the working box 2 is provided with screw holes, the spacing of which is the same as that of the fixed screw holes on the workbench 11, and the fixing device 10 is used to closely connect the workbox 2 and the workbench 11.

[0040] Step 3: The lower bead 7 of the indirect tensile test device is f...

Embodiment 2

[0046] Example 2: Indirect Tensile Fatigue Test Evaluation of Water Stability

[0047] Step 1: Form the same cylindrical asphalt mixture specimen 5 as in Example 1, measure the height h and diameter d of the specimen, calculate the cross-sectional area A of the specimen, and keep it at room temperature for 24 hours before use.

[0048] Step 2: The bottom of the working box 2 is provided with screw holes, the spacing of which is the same as that of the fixed screw holes on the workbench 11, and the fixing device 10 is used to closely connect the workbox 2 and the workbench 11.

[0049] Step 3: The lower bead 7 of the indirect tensile test device is fixed on the fixture 9, the fixture 9 and the column 4 are tightly connected to the bottom of the working box 2 through the screw holes, the upper bead 3 is fixed on the two columns 4, and can slide up and down freely. The upper bead and the lower bead are arranged in parallel and opposite to each other.

[0050] Step 4: Slowly inje...

Embodiment 3

[0055] Embodiment 3: Water stability performance evaluation under dynamic temperature field

[0056] Step 1: Form the same cylindrical asphalt mixture specimen 5 as in Example 1, measure the height h and diameter d of the specimen, calculate the cross-sectional area A of the specimen, and keep it at room temperature for 24 hours before use.

[0057] Step 2: The bottom of the working box 2 is provided with screw holes, the spacing of which is the same as that of the fixed screw holes on the workbench 11, and the fixing device 10 is used to closely connect the workbox 2 and the workbench 11.

[0058] Step 3: The lower bead 7 of the indirect tensile test device is fixed on the fixture 9, the fixture 9 and the column 4 are tightly connected to the bottom of the working box 2 through the screw holes, the upper bead 3 is fixed on the two columns 4, and can slide up and down freely. The upper bead and the lower bead are arranged in parallel and opposite to each other.

[0059] Step ...

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Abstract

The invention discloses an experimental device used for evaluation of water stability of a bituminous mixture and an experimental method. The experimental device comprises dynamic load loading equipment, a working box, an indirect tensile test device, a temperature control device and fixed equipment. The experimental device can simulate an external environment of the bituminous mixture in the practical use condition. By adopting a method of conducting an indirect tensile fatigue test in the experimental device, the evaluation of water stability performance of the bituminous mixture under multi-field coupling of stress field, temperature field, waterpower field and dynamic change is achieved, and a fatigue life is used to evaluate the water stability performance of the bituminous mixture in different use environments. The experimental device and the experimental method can be used for studying the water stability performance of the bituminous mixture in the practical use environment, and have very good evaluating effectiveness.

Description

technical field [0001] The invention relates to an experimental device and a test method for evaluating the water stability of asphalt mixture, belonging to the field of road engineering. Background technique [0002] By the end of 2014, the total mileage of highways in my country reached 4.4639 million kilometers, and the total mileage of expressways reached 111,900 kilometers. During the construction process, in order to improve road performance and reduce diseases, road workers have carried out continuous exploration. However, judging from the current usage conditions, the road surface diseases are still very serious, mainly rutting disease and water damage, and the proportion of water damage is increasing. There are many reasons for water damage, mainly including asphalt properties, aggregate properties, filler properties, additives, construction quality and environmental factors. Road workers have been seeking various methods to evaluate the influence of various influ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/18G01N3/32
CPCG01N3/18G01N3/32G01N2203/0017G01N2203/0073G01N2203/0224G01N2203/0226G01N2203/0252G01N2203/0266
Inventor 顾兴宇王晓威倪富健吴江涛刘勇
Owner SOUTHEAST UNIV
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