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A road surface icing adhesion strength test device and its test method

A technology for testing devices and adhesion strength, applied in measuring devices, mechanical devices, instruments, etc., can solve problems such as noise pollution, non-adjustable drop weight, complicated drop-weight impact test process, etc., and achieve a quiet test environment and secure fixation The effect of action

Active Publication Date: 2019-06-07
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] 1) Whether it is a falling rod or a falling hammer, it can only provide a vertical impact force, and there is no transverse shear stress during the impact process. Therefore, simple falling weight rods and hammers cannot vividly simulate the wheels. The dynamic process of pressure gauge icing;
[0005] 2) The falling weight of the falling rod or hammer cannot be adjusted, and the impact force can only be changed by adjusting the falling height;
[0006] 3) Neither the drop bar nor the drop weight device provides an effective fixture for the test specimen, which may lead to slippage during the impact process;
[0007] 4) The noise of the falling weight impact is relatively large, which is easy to cause noise pollution;
[0008] 5) The falling weight impact test process is complicated and inconvenient for test operation

Method used

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  • A road surface icing adhesion strength test device and its test method
  • A road surface icing adhesion strength test device and its test method
  • A road surface icing adhesion strength test device and its test method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] Adhesion Strength Test of Ice on Cement Concrete Pavement

[0049] 1) Take a cubic cement concrete specimen 100mm×100mm×100mm and weigh it in m a ;

[0050] 2) Adjust the bolts at both ends of the fixing clamp seat to fix the concrete specimen with the clamp seat;

[0051] 3) Adjust the telescopic rod so that the swing head and the surface of the test piece are at the height of level V, and add 1 weight;

[0052] 4) Release the control handle, allow the swing head to swing freely, exchange the specimen left and right, repeat 2) 3) operation once;

[0053] 5) Remove the crushed ice on the surface of the test piece, weigh the residual ice and the mass of the test piece m b ;

[0054] 6) Scrape the ice on the surface of the concrete specimen with a scraper, and weigh the cement concrete specimen as m c .

[0055] The data of each group is as follows:

[0056]

[0057]

[0058] Compute the adhesion coefficient for ice:

[0059]

[0060] Recorded as: Ⅴ 1 0.58...

Embodiment 2

[0062] Adhesion Strength Test of Ice on Cement Concrete Pavement

[0063] 1) Take a cubic cement concrete specimen 100mm×100mm×100mm and weigh it in m a ;

[0064] 2) Adjust the bolts at both ends of the fixing clamp seat to fix the concrete specimen with the clamp seat;

[0065] 3) Adjust the telescopic rod so that the swing head and the surface of the test piece are at the height of level V, and add 2 weights;

[0066] 4) Release the control handle, let the swing head swing freely, repeat 2) 3) operation once;

[0067] 5) Remove the crushed ice on the surface of the test piece, weigh the residual ice and the mass of the test piece m b ;

[0068] 6) Scrape the ice on the surface of the concrete specimen with a scraper, and weigh the cement concrete specimen as m c .

[0069] The data of each group is as follows:

[0070]

[0071] Compute the adhesion coefficient for ice:

[0072]

[0073] Recorded as: Ⅴ 2 0.492.

Embodiment 3

[0075] Adhesion Strength Test of Ice on Cement Concrete Pavement

[0076] 1) Take a cubic cement concrete specimen 100mm×100mm×100mm and weigh it in m a ;

[0077] 2) Adjust the bolts at both ends of the fixing clamp seat to fix the concrete specimen with the clamp seat;

[0078] 3) Adjust the telescopic rod so that the swing head and the surface of the test piece are at the height of level IV, and add 1 weight;

[0079] 4) Release the control handle, let the swing head swing freely, repeat 2) 3) operation once;

[0080] 5) Remove the crushed ice on the surface of the test piece, weigh the residual ice and the mass of the test piece m b ;

[0081] 6) Scrape the ice on the surface of the concrete specimen with a scraper, and weigh the cement concrete specimen as m c .

[0082] The data of each group is as follows:

[0083] mass (g)

1

2

3

4

5

6

7

m a

2330

2350

2330

2340

2330

2340

2340

m b

2321

2341

...

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Abstract

The invention provides an icy pavement adhesion strength testing device and a test method thereof. The device comprises a fixed part and a swinging part. Specifically, the fixed part comprises a host base, a fixation clamp seat and a dial, and the fixation clamp seat and the dial are fixed on the base by bolts. The swing part includes a swing head, weights, a shrinkage rod and a control handle, wherein one end of the shrinkage rod end is hinged to the control handle, the lower end is connected to the swing head through thread, and the swing head is provided with a raised vertical rod, different numbers of weights are sleeved on the vertical rod to achieve free adjustment of the self weight of the swinging part. The invention can simulate the rolling effect of running tires on the road through the swinging part freely swinging downward, the mass change of ice attached to the test piece before and after swing stop is determined to indirectly characterize the strength of adhesion force of ice adhered to the pavement.

Description

technical field [0001] The patent of the present invention relates to the technical field of road traffic pavement testing, in particular, to a test device for road icing adhesion strength and a test method thereof. Background technique [0002] my country has a vast territory, great differences in topography and landforms, and different climates in different regions. Road traffic is greatly affected by the natural environment, especially road icing. It has long affected the normal operation of passenger and freight transportation in Northeast China, northern Inner Mongolia and some southern mountainous areas, posing a huge hidden danger to the lives and property of the general public. According to incomplete statistics, the traffic accidents caused by winter freezing in my country over the years account for about 30% of the annual traffic accidents, and the accident rate is 4 to 5 times that of usual times. During the ice and snow disaster in 2008, highway traffic in 23 pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N19/04
CPCG01N19/04
Inventor 高英力黄亮代凯明李学坤马路肖敏强邹超
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY