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Multifunctional asphalt mixture dynamic water scouring test device and test method

A technology of asphalt mixture and test equipment, which is applied in the directions of measuring equipment, analyzing materials, testing wear resistance, etc., can solve the problems of not distinguishing between semi-dynamic water erosion and full-dynamic water erosion, and insufficient evaluation methods, and achieve test results Real and accurate, rich test methods and evaluation indicators, reasonable and reliable test results

Pending Publication Date: 2017-05-03
UNIV OF SCI & TECH BEIJING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to more realistically simulate the dynamic water scouring effect on the asphalt pavement caused by automobile tires passing by, in order to solve the problem that the existing asphalt mixture dynamic water scouring test device cannot really introduce the direct load effect, and does not distinguish between semi-dynamic water Based on technical problems such as scouring and full dynamic water scouring, and limited evaluation methods caused by the size of asphalt mixture specimens, a multifunctional dynamic water scouring of asphalt mixture with coupling effects of water, temperature and load is provided. Test device and method

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  • Multifunctional asphalt mixture dynamic water scouring test device and test method
  • Multifunctional asphalt mixture dynamic water scouring test device and test method

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specific Embodiment approach 1

[0032] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, the multifunctional asphalt mixture dynamic water scouring test device of the water, temperature, load coupling effect of this embodiment consists of an upper scouring bucket 1, a lower scouring bucket 2, a flange plate 3, an upper water pressure gauge 4, and a lower scouring bucket. Water pressure gauge 5, upper water pipe 6, lower water pipe 7, upper valve 8, lower valve 9, constant temperature water tank 10, piston 11, air valve 12, wheel 13, loading spring 14, guide rod 15, connecting member 16, adapter fittings 17 and so on. The upper flushing barrel 1 and the lower flushing barrel 2 are sealed and connected by the bolts 22 of the flange 3, and there are steps inside, and the heightening sleeve 19 can be used to fix the asphalt mixture test pieces 18 of different heights, and it is easy to install and disassemble. An upper airtight area 23 is formed between the upper surfac...

specific Embodiment approach 2

[0033] Specific implementation mode two: combination figure 1 To illustrate this embodiment, the test device of the present invention uses solid cylindrical pads to fill the lower airtight area 24, closes the lower valve 9, opens the upper valve 8, and cooperates with the upper water pipe 6 to introduce the water in the constant temperature water tank 10 into the upper airtight area 23, which can be realized in The upper surface of the asphalt mixture test piece 18 is washed with semi-dynamic water in the upper airtight area 23 .

specific Embodiment approach 3

[0034] Specific implementation mode three: combination figure 2To illustrate this embodiment, the piston 11 of the test device of the present invention reciprocates up and down, drives the wheel 13 on the guide rod 15 to reciprocate horizontally on the upper surface of the asphalt mixture test piece 18 through the connecting member 16, and realizes the wheel pairing test through the loading spring 14. The load is applied to the upper surface of the part, and the load can be controlled by adjusting the thickness of the spring. Wherein, the wheel 13 is a replaceable part, and a rubber wheel and a steel wheel can be used to respectively act on the upper surface of the asphalt mixture test piece 19 for comparison.

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Abstract

The invention belongs to the technical field of road engineering material performance testing, and relates to a multifunctional asphalt mixture dynamic water scouring test device with coupling effect of water, temperature and load and a corresponding test method. The test device comprises an upper scouring barrel, a lower scouring barrel, a flange plate, an upper water pressure gauge, a lower water pressure gauge, an upper water pipe, a lower water pipe, an upper valve, a lower valve, a constant temperature water tank, a piston, a gas valve, a wheel, a loading spring, a guide rod, a connecting member, a transit accessory and the like. The upper surface of an asphalt mixture specimen is subjected to semi dynamic water scouring, the dynamic water scouring effect on an asphalt pavement surface caused by vehicle tires is more actually simulated, a test environment is close to an actual work condition, and test results are true and accurate. With a height-padding sleeve, the dynamic water scouring test of the asphalt mixture specimen at different heights is achieved, the size limit of a conventional Marshall specimen is broken through, the test measuring method and evaluation indexes of the performance changes of the asphalt mixture before and after scouring are more abundant, and the test results are more reasonable and reliable.

Description

technical field [0001] The invention belongs to the technical field of performance testing of road engineering materials, and in particular relates to a multifunctional asphalt mixture dynamic water scouring test device and a corresponding test method under the coupling effect of water, temperature and load. Background technique [0002] Precipitation in rainy days will cause the surface of the asphalt pavement to be covered by a water film. When the vehicle passes by, the tire will squeeze the water in front into the gap on the road surface to generate hydrodynamic pressure; when the tire passes through, it will generate a vacuum in the rear. Suck the water out of the voids. The dynamic water pressure formed by this repeated extrusion and suction process will continuously scour the surface of the asphalt pavement, and gradually peel the asphalt film from the surface of the aggregate, resulting in loosening and pitting of the asphalt mixture, eventually resulting in asphalt ...

Claims

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Application Information

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IPC IPC(8): G01N3/56G01N3/02
CPCG01N3/02G01N3/567Y02A30/30
Inventor 汪林兵王文涛郭猛
Owner UNIV OF SCI & TECH BEIJING