Concrete crack making method

A production method and concrete technology, applied in the preparation of test samples, etc., can solve problems such as complexity, difficulty in operation, high cost, and lack of pertinence, and achieve the effects of easy handling, simple and reliable implementation, and good use effects

Active Publication Date: 2019-04-12
XIAN HIGHWAY INST +1
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Problems solved by technology

In the existing technology, the method of simple operation and low cost all uses fixed molds to make cracks. The obvious disadvantage of this method is that the finished cracks have a single shape and a smooth crack section. It is desirable to study simple problems, but for engineering The research on the more complex problems in the study is not targeted, and it is not suitable for the production of large cracks; the use of new technologies such as 3D printing technology, complex and expensive methods can perfectly simulate the crack shape, but due to the cracks grow larger Its operation difficulty and cost increase accordingly. It is too complicated to study practical engineering problems, such as exploring the sealing effect of new materials, and has no direct guiding significance for the sealing of natural cracks in actual engineering.

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Embodiment Construction

[0033] like Figure 1 to Figure 4 Shown, a kind of concrete crack making method of the present invention comprises the following steps:

[0034] Step 1, mold making: make a wooden mold without a top plate according to the size of the concrete test block 1 to be made, the size of the wooden mold is greater than the size of the concrete test block 1, the wooden mold is made of planks, and There are two through-hole pairs reserved on the side wall of the mold, the number of the through-hole pairs is two, the central axes of the two through-hole pairs are parallel, and the plane where the two central axes are located is parallel to the horizontal plane. The hole pair includes two through holes with the same size, and the distance β between the lower edge of the through hole in the through hole pair and the inner surface of the wooden mold bottom plate satisfies: 0<β<10cm;

[0035] In this embodiment, the thickness of the wooden board is not less than 4mm, so as to prevent the con...

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Abstract

The invention discloses concrete crack making method. The method comprises the following steps that 1, a mold is made; 2, a tie bar is reserved; 3, concrete is poured; 4, holes are drilled and cleaned; 5, a concrete test block is demolded; 6, a concrete expansive agent is prepared and poured; 7, the concrete teat block is maintained and a concrete crack is formed; and 8, the concrete crack is washed. A steel wire is arranged in the concrete test block in a pouring mode to ensure that the concrete test block does not break into two parts after the crack occurs. The concrete expansive agent is poured in a row of holes to make the concert crack. The row of holes can lead the concrete crack to form. The method is simple, the cost is low, a natural crack in practical engineering can be estimated, and a reliable basis is provided for the subsequent repair of tunnel cracks. The crack cross section is natural, and acceptability is achieved for studying practical problems.

Description

technical field [0001] The invention belongs to the technical field of making concrete cracks, and in particular relates to a method for making concrete cracks. Background technique [0002] Tunnel cracks are one of the important hazards of tunnel lining, so the repair of tunnel cracks is of great significance to the operation and maintenance of completed tunnels. For the repair of tunnel cracks, composite materials are currently mainly used for sealing. The sealing effect of composite materials on cracks must first be verified by laboratory tests, and then the cracks in the tunnel itself should be repaired. Therefore, the making of cracks in concrete test blocks has become an essential key link in the test. In the existing technology, the method of simple operation and low cost all uses fixed molds to make cracks. The obvious disadvantage of this method is that the finished cracks have a single shape and a smooth crack section. It is desirable to study simple problems, but...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28
CPCG01N1/28
Inventor 苗建宝袁卓亚袁帅石雄伟冯威许冰柯亮亮赵庭张小亮张森豪司晓东
Owner XIAN HIGHWAY INST
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