Air bag sealing device for concrete test block penetration test

Abstract

The invention discloses an air bag sealing device for a concrete test block penetration test. The air bag sealing device comprises a base used for bearing a test block, a sleeve arranged on the base,the cross section of the air bag being annular, and an upper cover which covers the sleeve. The air bag is higher than or equal to the test block; an inflation cavity is formed in the air bag; a gap is reserved between the inner wall of the air bag and the side surface of the test block before the air bag is inflated; after the air bag is inflated, the inner wall of the air bag is tightly attachedto the side face of the test block, an inflation opening communicated with the inflation cavity is formed in the outer wall of the air bag, an opening is formed in the position, corresponding to theinflation opening, of the side wall of the sleeve, at least one water injection channel is formed in the base, and water injection openings of the water injection channels are formed in the peripheralwall of the base. The air bag sealing device for the concrete test block penetration test is simple in structure, time-saving, labor-saving, high in sealing efficiency and capable of guaranteeing thesealing quality.

Description

technical field [0001] The invention belongs to the field of concrete detection devices, and in particular relates to a sealing device for concrete impermeability test. Background technique [0002] Concrete impermeability is one of the important indicators of concrete durability. When performing an impermeability test on a concrete test block, it is necessary to make a circular table with a diameter of 175mm on the upper bottom, a diameter of 185mm on the lower bottom, and a height of 150mm according to the national standard. Block, the test water needs to penetrate from one bottom surface of the test block to the other bottom surface, but cannot penetrate from the side (cone surface) of the test block, so the side of the test block must be sealed. The sealing treatment of the test block is particularly important. If the sealing is not good, the impermeability of the concrete cannot be accurately tested. [0003] There are mainly two types of sealing methods in the prior a...

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Problems solved by technology

[0004] The first method is to use an elastic sealing sleeve with a certain thickness to seal the test block. The size of the elastic sealing sleeve is slightly smaller than the test block. If the size of the sleeve is too large, there will be a problem of fitting, and if it is too small, it will not be easy to fit outside the test block, and it cannot take into account the difficulty of fitting and the degree of fit with the side of the test block;

[0005] The second method is to use paraffin to seal the test block. This method needs to heat the paraffin until it is completely melted, then roll the side of the test block in the melted paraffin for a week, and then wait for cooling to form a paraffin sealing layer on the side of the test block. This method takes a long time, and there may be tiny pores on the sealing layer, which cannot guarantee the sealing quality and affects the test results

[0006] The above two methods adopt manual sealing, which has the problems of time-consuming and labor-intensive, low sealing efficiency and unguaranteed sealing quality.

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