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Method and device for detecting compression strength of concrete by anti-shearing method

A technology of compressive strength and shear strength, which is applied in the field of concrete compressive strength detection, can solve problems such as inaccurate test results, complex stress conditions, and damage to tested components, and achieve simple and easy testing process, low cost, and wide range wide effect

Inactive Publication Date: 2012-04-25
CHINA ACAD OF BUILDING RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a method and device for detecting the compressive strength of concrete by anti-shear method. It is necessary to solve the problem that most of the existing methods for testing the compressive strength of concrete have certain damage to the components to be tested, and there are many restrictions during the test. The medium stress situation is complicated, which often leads to technical problems of inaccurate test results

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  • Method and device for detecting compression strength of concrete by anti-shearing method
  • Method and device for detecting compression strength of concrete by anti-shearing method
  • Method and device for detecting compression strength of concrete by anti-shearing method

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Embodiment

[0031] In an embodiment, a method for detecting the compressive strength of concrete by the shearing method, the steps are as follows:

[0032] Step one: randomly drill three shear test specimens 6 on the tested concrete structure or component; when drilling the shear test specimens, a hollow rhinestone is used, and the inner diameter of the hollow rhinestone is not less than 44mm.

[0033] Step two, the first shear test piece is placed in the test piece conduit 11 of the shear device, and the movable section of the test piece conduit 11 is 11. 1 Connect the connecting nut and the power transmission rod 7, and tighten the nut 1 slightly, adjust the load meter 8 to zero, start the hand oil pump 9, the hand oil pump 9 is pressurized, the jack 2 cylinder is filled with oil, and through the power transmission rod 7 Apply shear to the section of the shear test piece located at the movable section of the pipe of the test piece;

[0034] Step three, gradually increase the shear force until ...

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Abstract

The invention relates to a method and a device for detecting the compression strength of concrete by an anti-shearing method. The method comprises the following steps of: calculating anti-shearing strength by recording the anti-shearing load and the area of a broken fracture surface when the concrete is broken; and building a correlated relationship according to the anti-shearing strength and the strength of a corresponding cubic test piece with the edge length of 150mm, so that the compression strength of the concrete is presumed. The influence factor during testing can be reduced by applying pure shear force to a test component, the test precision can be improved, and the test process is simple and easy. The method and the device can be widely used for detecting the solid strength of concrete structures in the industries such as building, railway, traffic, water transport, harborwork and the like.

Description

technical field [0001] The invention relates to a method and a device for detecting the compressive strength of concrete. Background technique [0002] At present, the methods for testing the compressive strength of concrete include rebound method, core drilling method, ultrasonic rebound comprehensive method, post-anchor method and shear compression method. The following table compares the principles and existing defects of the above test methods. [0003] [0004] In summary, the closest test method with the present invention is the shear compression method, and its similarity is to utilize the test shear strength to estimate the compressive strength. The difference is that the shear compression method has the following defects: Concrete structural members have certain damage, and it is only the strength of the concrete surface to be tested, and is limited by conditions such as the shape of the test specimen, the selection of the location, the range of the compressiv...

Claims

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Application Information

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IPC IPC(8): G01N3/24
Inventor 邱平葛树奎朱跃武李杰成王文明王宇新
Owner CHINA ACAD OF BUILDING RES
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