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A test method for multidirectional seepage of asphalt mixture with constant head

A technology of asphalt mixture and test method, which is applied to the analysis of materials, permeability/surface area analysis, suspension and porous material analysis, etc., and can solve the problems of inability to distinguish vertical, horizontal and coupled seepage, and limitations of permeability coefficients, etc. , to achieve true and accurate test results, simple molding methods, and easy test replacement

Active Publication Date: 2022-08-05
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing asphalt mixture seepage test method cannot distinguish vertical, transverse and coupled seepage according to the actual situation of the road surface, the measured permeability coefficient has limitations, and further provides a constant water head asphalt mixture with multiple To seepage test method

Method used

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  • A test method for multidirectional seepage of asphalt mixture with constant head
  • A test method for multidirectional seepage of asphalt mixture with constant head
  • A test method for multidirectional seepage of asphalt mixture with constant head

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specific Embodiment approach 1

[0053] Specific implementation one: as Figures 1 to 8As shown, the steps of the multi-directional seepage test method for asphalt mixtures with constant head described in this embodiment are as follows:

[0054] Step 1. Prepare Marshall test piece:

[0055] According to the test method of "Asphalt and Asphalt Mixture Test Regulations for Highway Engineering", the asphalt mixture test piece was made, and the hollow Marshall test piece was formed by the hollow Marshall test piece. The inner diameter of the Marshall test piece was 7mm to 40.8mm. The outer diameter is 101mm, and the height of the Marshall test piece ranges from 43.5mm to 83.5mm;

[0056] Step two, vacuum water retention:

[0057] Place the formed Marshall test piece at room temperature for 24 hours, and then use a vacuum pump to vacuum the Marshall test piece for water retention for 5 to 20 minutes;

[0058] Step 3. Sealing treatment:

[0059] When measuring vertical seepage: insert the hollow anti-seepage ru...

specific Embodiment approach 2

[0079] Embodiment 2: In step 1 of this embodiment, the inner diameter of the Marshall test piece ranges from 10 mm to 30 mm, and the height of the Marshall test piece ranges from 50 to 80 mm. In this way, the inner diameter range and height range of the Marshall test piece are within the scope of the asphalt and asphalt mixture test regulations, in line with the "Highway Engineering Asphalt and Asphalt Mixture Test Regulations". Other components and operation steps are the same as in the first embodiment.

specific Embodiment approach 3

[0080] Embodiment 3: In step 1 of this embodiment, the inner diameter of the Marshall test piece ranges from 15 mm to 25 mm, and the height of the Marshall test piece ranges from 55 to 70 mm. In this way, the inner diameter range and height range of the Marshall test piece are within the scope of the asphalt and asphalt mixture test regulations, in line with the "Highway Engineering Asphalt and Asphalt Mixture Test Regulations". Other compositions and operation steps are the same as in the second embodiment.

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Abstract

A multi-directional seepage test method for asphalt mixture with constant head, which relates to a seepage test method. The invention solves the problem that the existing asphalt mixture seepage test method cannot distinguish vertical, lateral and coupled seepage according to the actual conditions of the road surface, and the measured permeability coefficient has limitations. Step 1, prepare a Marshall test piece; Step 2, place the formed Marshall test piece at room temperature for 24 hours, and then use a vacuum pump to hold the Marshall test piece in a vacuum for 5 to 20 minutes; Step 3, sealing treatment: vertical seepage sealing, Transverse seepage seal, coupled seepage seal; Step 4, install seepage device: put the sealed Marshall test piece into the lower cavity of the seepage device, connect the upper and lower cavity connecting parts to the Marshall test piece to ensure sealing and connection The upper cavity, the connecting piece and the lower cavity; Step 5, water through the seepage device; Step 6, calculate the total water head. The invention is used for multi-directional seepage test of asphalt mixture with constant head.

Description

technical field [0001] The invention relates to an asphalt mixture seepage test method, in particular to a multidirectional seepage test method of an asphalt mixture with a constant water head. Background technique [0002] Asphalt pavement is a typical porous medium material, and it is unavoidable that various types of diseases will be caused by the coupling effect of vehicle load, temperature and humidity in the service process. It is the main reason for the early damage of asphalt pavement. The seepage of water in the asphalt mixture accelerates the peeling of the asphalt from the aggregate surface, thereby reducing the adhesion between the asphalt and the aggregate, and eventually leading to pits, oiling, and looseness on the asphalt pavement. Therefore, the seepage characteristics of water is an important index parameter to characterize the durability of asphalt pavement. On the other hand, in recent years, the application of drainage asphalt pavement has become an im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N15/08
CPCG01N15/0826
Inventor 董泽蛟隋鑫刘志杨杨晨
Owner HARBIN INST OF TECH