Bridge deck bonding layer torsional shearing device and detection method thereof

A bonding layer and device pairing technology, applied in the field of testing instruments for evaluating bridge deck performance, can solve the problem of difficulty in realizing bridge deck bonding layer monitoring and unification of indoor and outdoor tests, poor field operability, and large bridge deck damage and other problems, to achieve the effect of comprehensive test results, strong integrity, and easy operation

Inactive Publication Date: 2012-09-26
CHANGAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Some people in the industry have disclosed methods and instruments for the shear performance test of the bonded layer, but most of the instruments have complex and bulky structures, poor on-site operability, and great damage to the bridge deck during the test. Monitoring of bondlines and unification of indoor and outdoor testing

Method used

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  • Bridge deck bonding layer torsional shearing device and detection method thereof
  • Bridge deck bonding layer torsional shearing device and detection method thereof
  • Bridge deck bonding layer torsional shearing device and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] see figure 1 , The bridge deck bonding layer torsion shear device in this embodiment is composed of a torque wrench 1 , a torque measuring instrument 2 , a torsion shear head 6 , a torsion shear plate 3 , a bolt 4 , and an adapter 5 .

[0028] The above-mentioned torque wrench 1 selects a conventional manual torque wrench 1, and a hexagonal torsion shear head 6 that is perpendicular to the torque wrench 1 is installed at one end of the torque wrench 1, and the torque measuring instrument 2 is installed on the torque wrench 1 and can sense the change of torque, It is displayed in digital form. The lower end of the torsion shear head 6 is connected to the upper end of the hexagonal bolt 4 through the adapter 5, and the other end of the bolt 4 is welded to the center of the torsion shear plate 3. The torsion shear plate 3 is in the shape of a disc, and the bottom surface is flat, which is connected with the torque wrench. The center plane of 1 is parallel, and it is bonde...

Embodiment 2

[0041] In the bridge deck bonding layer torsion shear device of this embodiment, the torsion shear plate 3 is a square structure with a side length of 100 mm, the connecting end of the bolt 4 and the adapter 5 is processed into a square structure, and the lower end of the torsion shear head 6 is connected to the rotating The end connected by the joint 5 is also processed into a square structure. The adapter 5 fastens the torsion shear head 6 and the bolt 4, and the torsion shear disc 3 will not rotate when the torsion shear wrench is rotated. Other components and their connection relationships are the same as those in Embodiment 1.

[0042] The method for testing the shear resistance of the adhesive layer of the test piece using this device is the same as that in Example 1.

Embodiment 3

[0044] In the bridge deck bonding layer torsion shear device of this embodiment, the torsion shear head 6 and the adapter 5 are welded into an integral structure, and the torsion shear plate 3 is a rectangular structure with an area larger than that of the drill core. Other components and their connection relationships and implementation Example 1 is the same.

[0045] The method for testing the shear resistance of the adhesive layer of the test piece using this device is the same as that in Example 1.

[0046] The technical scheme of the present invention is further verified by the torsion shear instrument and the shear resistance detection method in Example 1 below, and the results are as follows:

[0047] 1. Detection of different mixture specimens

[0048] Using the detection method in the above-mentioned Example 1, six kinds of mixed material test pieces including SMA-13, FAC-13, AC-13, FAC-20, AC-20 and SP-C were used for torsion shear test. The test data are shown in ...

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Abstract

The invention relates to a bridge deck bonding layer torsional shearing device and a detection method of the bridge deck bonding layer torsional shearing device. A torque spanner is connected with a torsional shear tray by a rotary joint, torsion is transmitted to a test piece to be detected by the torsional shear tray when the torque spanner is twisted to apply torque, the maximum torque value when the concrete layer and an asphalt paving layer of the test piece to be detected are separated is recorded, thus obtaining the shearing strength of the bonding layer of the test piece to be detected.. The device has a simple structure, is convenient to carry, and can conduct interior test and on-site detection, thus being simple and convenient to operate. The method can conduct test on interior simulation of different bridge floor treatment conditions, different bonding layers, and mixture paving structures of different paving layers, is accurate in measurement result, comprehensively consider the area and torque size of the test piece, and ensure that the measurement result is complete, and strong in integrity.

Description

technical field [0001] The invention relates to a test instrument and method for evaluating the performance of bridge deck, in particular to a test instrument for the shear strength of a bridge deck bonding layer and a method for detecting the shear strength of the bridge deck bonding layer by using the device. Background technique [0002] In bridge construction, the main diseases of asphalt concrete pavement on concrete bridge decks are the spalling, loosening, and wrapping of the concrete surface layer. Therefore, the shear resistance of the bonding layer is an important factor in determining its service life. [0003] At present, there is no standard test method and procedure for evaluating the shear resistance of bridge deck bonding layer in my country. Therefore, there is no unified testing method in the actual testing process. Some people in the industry have disclosed the methods and instruments for the shear resistance test of the bonding layer, but most of the ins...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/24
Inventor 刘红瑛郝培文袁成刚徐金枝汪海年
Owner CHANGAN UNIV
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