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Self-healing concrete crack repair inspection method

An inspection method and self-healing technology, applied in the direction of instruments, sustainable waste treatment, solid waste management, etc., can solve the problems of the test process, computational complexity, etc., and achieve the advantages of preliminary screening, easy-to-understand principles and simple molds Effect

Pending Publication Date: 2022-06-03
POWERCHINA XIBEI ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For the stage of preliminary research and big data screening of self-healing materials, the test process and calculation mechanism are relatively complicated

Method used

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  • Self-healing concrete crack repair inspection method
  • Self-healing concrete crack repair inspection method
  • Self-healing concrete crack repair inspection method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] refer to Figure 1-Figure 3 A self-healing concrete crack repair inspection method shown, comprising the following steps:

[0065] Step 1: prepare self-healing concrete mortar;

[0066] Step 2: Molding

[0067] According to the preset crack repair test group and impermeability repair test group, put the self-healing mortar prepared in step 1 into different groups of test molds to prepare impermeability samples and mortar samples. Prepare at least three samples for each group;

[0068] Step 3: Prefabricate cracks for impermeable samples;

[0069] Step 4: Standard Care

[0070] For the mortar sample in step 2 and the impermeability sample with prefabricated cracks in step 3, the temperature is 20±2℃, and the humidity is not less than 95%.

[0071] Step 5: Prefabricate cracks on the cement sample cured in Step 4;

[0072] Step 6: Preset Mode Maintenance

[0073] The impermeable samples cured in step 4 and the mortar samples with prefabricated cracks in step 5 are re...

Embodiment 2

[0083] refer to figure 1 , figure 2 and image 3 A self-healing concrete crack repair inspection method is shown. On the basis of the first embodiment, the test mold in the second step includes a frustoconical metal test mold and a mortar test mold, and a frustoconical metal test mold. It is used to prepare impermeable samples, and the mortar mold is used to prepare mortar samples.

[0084] In the specific application, the frustoconical metal test mold and the mortar test mold used are the mortar impermeability test mold and crack observation stipulated in the construction industry standard of the People's Republic of China "Concrete Test Mode" (JG 237-2008). For the test mold, the test mold specified by the existing specification is adopted, and there is no need to customize the mold. The test method is universal and saves costs.

Embodiment 3

[0086] refer to figure 1 , figure 2 and image 3 A self-healing concrete crack repair inspection method is shown. On the basis of Embodiment 1, the specific method for prefabricating cracks in the impermeable sample in the third step is: preparing the impermeable sample test mold in the second step. Insert a blade with a width of 20mm and a thickness of 0.3-0.35mm wrapped with tape on the impermeable sample perpendicular to the surface of the sample, and the blade penetrates the upper and lower surfaces of the sample; shake the blade after 1.5-2.5 hours of mold installation to avoid sticking, and pull it out when it reaches initial setting A blade will do.

[0087] In this technical solution, the blade is shaken 1.5-2.5 hours after the mold is installed to avoid bonding. At this time, the mortar will harden to a certain extent, but the initial setting has not been reached. The shaking will not cause slight damage to the interior and surface of the mortar sample. Pre-cracks...

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Abstract

The invention belongs to the technical field of concrete material inspection, and particularly relates to a self-healing concrete crack repair inspection method. The crack repairing performance of the self-healing concrete is detected through six steps of preparing self-healing concrete mortar, filling a mold, prefabricating cracks for an anti-permeability sample, performing standard curing, performing crack prefabrication on the cured mortar sample and performing repairing detection test. The device is easy to operate, the real environment where the concrete structure is located is simulated through different test environments, and the requirements of different concrete materials for environment research are met. By the adoption of the self-healing concrete crack repairing and detecting method, large-scale repairing and detecting can be conducted, the repairing effect of self-healing materials of different types and mixing amounts on concrete can be qualitatively and quantitatively researched, and preliminary screening of test materials and comparison testing of various environments are facilitated. The mold adopted by the invention is simple and does not need to be customized, so that the production cost is saved.

Description

technical field [0001] The invention belongs to the technical field of concrete material inspection, in particular to a self-healing concrete crack repair inspection method. Background technique [0002] Concrete is the most widely used man-made building material. Long-term service in complex and harsh environments will cause micro-damages and micro-cracks, and expand under continuous load to form macro-crack diseases, reducing the mechanical properties and durability of concrete. Studies have shown that cement concrete itself has a certain self-healing ability, but its self-healing efficiency is relatively low, which cannot meet the needs of practical engineering. Therefore, by incorporating self-healing materials into traditional concrete materials to improve the self-healing properties of concrete, self-healing concrete is prepared, also known as "self-healing concrete". The more extensive type of research on self-healing concrete materials is that the self-healing perfo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/28G01N15/08G01B21/02
CPCG01N1/28G01N15/08G01B21/02Y02W30/91
Inventor 贺晶晶胡炜狄圣杰卢浩丹樊李浩黄鹏
Owner POWERCHINA XIBEI ENG
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