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Auxiliary device and method for detecting rust resistance of reinforcing steel bar under pure bending

An auxiliary device, pure bending technology, used in measuring devices, weather resistance/light resistance/corrosion resistance, and the use of stable torsion to test the strength of materials, etc. There are no reported problems such as corrosion performance, to avoid stress measurement errors, good practicability, and avoid complex stress

Inactive Publication Date: 2020-02-11
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the action of loads such as bending moments, the corrosion resistance of steel bars will be affected, thereby affecting the structural durability of reinforced concrete
At present, there is no report on the research on the corrosion resistance of steel bars under uniform bending moment and no shear force.

Method used

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  • Auxiliary device and method for detecting rust resistance of reinforcing steel bar under pure bending
  • Auxiliary device and method for detecting rust resistance of reinforcing steel bar under pure bending
  • Auxiliary device and method for detecting rust resistance of reinforcing steel bar under pure bending

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] An auxiliary device for detecting the corrosion resistance of steel bars under pure bending, such as figure 1 As shown, it includes a container 1 and a loading device fixed in the container 1. The loading device includes a fixed base 3, a loading knob 5, a spiral vertical strut 6, a ball-type torque eliminator 7, an embedded liquid crystal display force measurement 9, loading part 8 and loading slot 4. The container 1 is filled with an erosion simulating liquid 2 , and the loading device is immersed in the erosion simulating liquid 2 .

[0028] like figure 2 As shown, the fixed base 3 is a strip-shaped structure and is located on both sides of the bottom of the container 1, so that the loading device can be kept stable in the erosion simulation liquid 2, that is, it is used to fix the loading device.

[0029] like figure 1 As shown, the fixed base 3 is provided with a loading slot 4 , the wall of the loading slot 4 is provided with a specimen fixing jaw 13 , and the...

Embodiment 2

[0036] A method for detecting the corrosion resistance of steel bars under pure bending, the specific steps are as follows:

[0037] (1) Handling of specimens: such as figure 1 As shown, the surface of the test piece 10 is wrapped with a layer of epoxy resin, and then closed with a soft adhesive layer to form a sealing coating 11, and an exposed area 12 is provided in the middle of the test piece 10, and the length of the exposed area 12 is 1~ 1.5 cm in width and 0.8-1 cm in width; one end of the test piece 10 is welded with an enameled wire 14 , and the exposed metal part of the enameled wire 14 is wrapped in the sealing coating 11 .

[0038] (2) Loading load: Fix the processed specimen 10 at the specimen fixing jaw 13 of the loading tank 4, and then rotate the loading knob 5 to drive the spiral vertical support rod 6 to move upward, so that the two The force-bearing tip 17 touches the test piece 10 above it, and continues to rotate to give a load to the test piece 10. The e...

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Abstract

The invention discloses an auxiliary device and a method for detecting rust resistance of a reinforcing steel bar under pure bending. The auxiliary device includes a container and a loading device inthe container. The container contains erosion simulation liquid. The loading device in the container is connected to the container through a fixed base and immersed in the erosion simulation liquid. The loading device comprises the fixed base, a loading knob, a spiral vertical support rod, a ball torque eliminator, an embedded liquid crystal display dynamometer, a loading component and a loading groove. The embedded liquid crystal display dynamometer is embedded between the loading component and the ball torque eliminator. The loading groove is provided with a sample fixing clamp for fixing asample. The loading component loads the sample to provide a uniform bending moment through two action points under the action of the lower loading knob. The auxiliary device of the present invention can provide the uniform bending moment on an exposed part of the reinforcing steel bar without interference of shear force. The auxiliary device can accurately display a stress value in real time during use, is convenient to use, easy to operate and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of material performance testing, and in particular relates to an auxiliary device and method for detecting the anti-corrosion performance of steel bars under pure bending action. Background technique [0002] Corrosion of steel bars is the most important factor causing the decrease of the durability of concrete structures, and corrosion of chloride salts is the main cause of corrosion of steel bars. A large number of early concrete structures deteriorated before their useful life, resulting in premature failure of the structure, resulting in huge direct and indirect losses. At present, my country is in the peak period of infrastructure construction and maintenance, and it is the region that uses the most reinforced concrete structures in the world. In this context, testing the corrosion resistance of steel bars is of great and far-reaching significance for improving the durability of reinforced concrete and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N17/02G01N17/00G01N3/22
CPCG01N3/22G01N17/006G01N17/02
Inventor 宋子健张英杰刘浪蒋林华王婉怡骆玉叶
Owner HOHAI UNIV
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