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Dedicated clamp for stretching

A special fixture and fixture technology, applied in the field of special fixtures, can solve the problems of deviation, splitting test can not completely simulate the stress shape of concrete bond strength, etc., to achieve the effect of ensuring success rate, guaranteeing damage, and accurate experimental results

Pending Publication Date: 2019-07-09
SINOHYDRO BUREAU 12 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there is no direct indoor test method for concrete bond strength in China, and the split test is used to indirectly calculate the concrete bond strength, and the split test cannot completely simulate the stress form of concrete bond strength, so the test results are different from the actual bond strength. certain deviation

Method used

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Embodiment Construction

[0031] The structures involved in the present invention or the technical terms used are further described below. In the following detailed description, reference texts accompanying the legends are a part hereof, and are presented by way of illustration of certain embodiments in which the invention may be practiced. We do not exclude that the present invention can implement other specific solutions and change the structure of the present invention without departing from the scope of use of the present invention.

[0032] Such as Figure 1-5 As shown, the tensile special fixture of the concrete tensile bond strength test of the present invention is composed of two parts: the upper fixture 100 and the lower fixture 200, through the cooperation of the upper fixture 100 and the lower fixture 200, the specimen is clamped, wherein, The test piece includes a base test piece 400 and a concrete test piece 300 bonded together, and the base test piece 400 is a surrounding rock structure....

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Abstract

The invention provides a dedicated clamp for stretching. The clamp is used for a concrete tensile bonding strength test, and comprises an upper clamp and a lower clamp; the upper clamp comprises two side plates, a pressing plate, a cover plate, and bolts for fixing the side plates and the cover plate; a bending part is arranged at the top of each side plate and used for bearing the cover plate; corresponding through holes for inserting of the bolts are arranged at the bending parts of the side plates and the end part of the cover plate; the lower clamp comprises a groove for holding a test piece, a support plate located in the groove and springs located at the bottoms of the support plate and the groove. Through the dedicated clamp for stretching provided by the invention, a clamping testpiece can be adhered at the side, the eccentric force influence is eliminated, the first damage in the test piece in the test is avoided, the bonding surface damage is guaranteed, and the test successful rate is guaranteed; and the spring of the lower clamp can counteract the dead weight of the test piece when clamping the test piece, the test piece can counteract the dead weight in the stress testing, and the experimental result is accurate.

Description

technical field [0001] The invention belongs to the field of water conservancy and hydropower engineering construction, and in particular relates to a special clamp for clamping concrete specimens in concrete tensile bond strength tests. Background technique [0002] The bond strength detection value in the lining support design process of hydraulic engineering is of great significance to determine the design strength level of concrete. During the construction process, the bond strength test data can be used to optimize the concrete strength mix ratio, so the bond strength test is a clear design parameter. and an important part of the construction plan. [0003] At present, there is no direct indoor test method for concrete bond strength in China, and the split test is used to indirectly calculate the concrete bond strength, and the split test cannot completely simulate the stress form of concrete bond strength, so the test results are different from the actual bond strength...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04G01N19/04
CPCG01N3/04G01N19/04G01N2203/0017G01N2203/0429G01N2203/0676G01N2203/0682
Inventor 卢长波徐敏徐文杰邸元秀赵慧
Owner SINOHYDRO BUREAU 12 CO LTD
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