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Device and method for testing frost heaving stress and release characteristics thereof of porous asphalt mixture

A technology for asphalt mixture and frost heave, which is applied in measurement devices, analysis of suspensions and porous materials, and measurement of force, etc., can solve the problem of no unified standard method, etc. Effect

Inactive Publication Date: 2019-12-20
江苏宿迁交通工程建设有限公司
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

As for the testing of frost heave stress and the analysis of release characteristics, there is no uniform standard and specific method in each country.

Method used

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  • Device and method for testing frost heaving stress and release characteristics thereof of porous asphalt mixture
  • Device and method for testing frost heaving stress and release characteristics thereof of porous asphalt mixture
  • Device and method for testing frost heaving stress and release characteristics thereof of porous asphalt mixture

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Embodiment

[0042] The device and method can be applied not only to porous asphalt mixtures, but also to research on the frost heave stress and release characteristics of porous cement mixtures.

[0043] In the following, the test method of the frost heave stress and release characteristics of the porous cement mixture rut board is described as an example. The test piece used in the examples is a porous cement mixture rut board, and its mixing ratio and void ratio are shown in Table 1.

[0044] Table 1 The mixing ratio and void ratio of the porous cement mixture used in the embodiment

[0045]

[0046] Form the porous cement mixture rut plate specimen (hereinafter referred to as the specimen) according to the mixing ratio of Table 1, and cure it under standard curing conditions for 28 days. Use a vernier caliper to measure the rut plate specimen length 30cm, width 30cm, height 5cm, and calculate the rut board The volume of the test piece is 4500cm 3 .

[0047] Wrap the bottom and sides of the po...

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Abstract

The invention discloses a testing device and method for measuring frost heaving stress and release characteristics thereof of a rutting plate of porous asphalt mixture, and the device comprises a rutting plate fixing device, a resistance earth pressure box, and a static strain tester. The use of the device includes the following steps of forming a test piece of the rutting plate of the porous asphalt mixture, controlling its pore water saturation, simulating the freeze-thaw process of the rutting plate of the porous asphalt mixture, outputting strain through the static strain tester, and calculating stress through a formula. By comparing the stress changes in different directions, the directional differences of frost heaving stress and release characteristics are analyzed. By observing thestress change of the rutting plate during melting, the stress release characteristics during melting are analyzed. By comparing the frost heaving stress and release characteristics of the rutting plate with or without ruts, the influence of ruts on the freeze-thaw durability is judged.

Description

Technical field [0001] The invention belongs to the field of stress testing of porous mixtures, and specifically relates to the testing of frost heave stress changes and release characteristics of porous mixture rut plates. Background technique [0002] Porous asphalt pavement has become an important form of road paving due to its many advantages such as anti-skid, noise reduction, safe driving in rainy weather, and effective supplement of groundwater resources. However, the problem of insufficient freeze-thaw durability caused by freeze-thaw damage has affected the wide application of porous asphalt pavements. Therefore, in order to promote the popularization and application of porous asphalt pavements, research on freeze-thaw damage caused by frost heave and residual stress should be carried out in depth. [0003] The particularity of the internal pore structure of porous asphalt mixtures makes the freeze-thaw process and damage conditions significantly different from those of o...

Claims

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Application Information

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IPC IPC(8): G01N33/42G01L1/22G01N15/08
CPCG01L1/2206G01N15/0893G01N33/42
Inventor 吴胜坤朱文兵周俊臧小双桂佳佳周大松刘野陈雷冯浩
Owner 江苏宿迁交通工程建设有限公司
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