Sealing method for impermeability test of concrete

Abstract

The invention discloses a sealing method for impermeability test of concrete. The method comprises the following steps: step 1, maintaining a truncated-cone-shaped test block used for impermeability test, taking the test block in one hour before the impermeability test, cleaning the side surface of truncated-cone-shaped test block by wiping and removing burrs; step 2, uniformly smearing the side surface of truncated-cone-shaped test block with a weather-proof neutral silicone adhesive so as to form an annular sealing adhesive strip; step 3, cleaning a test block sleeve by wiping, sleeving the test block smeared with the weather-proof neutral silicone adhesive with the test block sleeve; step 4, spraying the weather-proof neutral silicone adhesive into gaps formed in joint of the test block and test block sleeve, flattening and compacting the gaps so as to form an annular adhesive ring on the surfaces of the gaps and carrying out indoor standing for 5.5 to 6.5 h until the annular adhesive ring on the surfaces of the gaps, thereby obtaining a treated test block; and step 5, loading the treated test block on an impermeability instrument for impermeability test. The method provided by the invention improves the efficiency of the impermeability test of concrete, reduces work intensity of testing personnel, saves cost and decreases environmental pollution.

Description

technical field [0001] The invention relates to the field of sealing concrete anti-seepage test blocks, in particular to a method for sealing concrete anti-seepage tests. Background technique [0002] The impermeability of concrete is a very important indicator of the durability of concrete. Whether the effective sealing of the test block can be completed in the impermeability test is the key to whether the impermeability test can be carried out smoothly. At present, the test method of concrete impermeability performance in my country is carried out in accordance with the standard of long-term performance and durability test method of ordinary concrete. Regarding the sealing of the test block of the impermeability test, although the standard introduces the paraffin sealing method and the cement plus butter sealing method, However, these two methods not only have complicated processes and pollute the environment, but also have unsatisfactory sealing effects under the action of...

AI Technical Summary

Problems solved by technology

Compared with the above-mentioned method, although the steps are simple, there is no need to heat the test mold, and the time required for the sealing of the test block is short, but on the one hand, because the butter is in a plastic state and mixed with cement, it will pollute the laboratory environment and is not easy to clean. , causing great resistance to the experimenters in terms of sensory perception, and the test mold is not easy to clean after the test

On the other hand, this method has poor sealing performance, and the pressure water can easily pass through the part where the concrete contacts with the test mold and cause side leakage, which makes the test fail.

[0005] Concrete impermeability test block sealing limits concrete impermeability test research and affects concrete durability research, so a simple, clean and effective new sealing method is needed

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