Evaluating methods of concrete surface coatings to extend the durability life of concrete structures

A concrete structure and concrete surface technology, applied in the direction of surface/boundary effect, weather resistance/light resistance/corrosion resistance, instruments, etc.

Active Publication Date: 2021-06-11
JIANGSU UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, from the background information of life365, coating anti-corrosion measures have more elements of empirical judgment on the quantifiable indicators of prolonging the durability life.
[0003] Domestic quantitative research on the extension of the durability life of concrete structures by coating anti-corrosion measures has not yet been reported. Although some current codes provide coating protection to extend the durability life of concrete structures, this parameter is only obtained based on experience. The value of , and there is no relevant research as support

Method used

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  • Evaluating methods of concrete surface coatings to extend the durability life of concrete structures
  • Evaluating methods of concrete surface coatings to extend the durability life of concrete structures
  • Evaluating methods of concrete surface coatings to extend the durability life of concrete structures

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Experimental program
Comparison scheme
Effect test

Embodiment

[0027] Taking the 5-year exposure data in the splash zone of Qingdao Exposure Test Station as an example, the coating is calculated to prolong the service life of the concrete structure.

[0028] Assuming that the service life of the coating itself is 20 years, the coating will fail after 20 years and lose its protective effect; the thickness of the concrete protective layer is 50mm. Within the protection period of the coating, the average chloride ion concentration on the surface of the coated concrete is calculated by the following formula. The average surface concentration of chloride ions on the surface of the coated concrete for 20 years is 0.191 (%, relative to the mass percentage of the concrete).

[0029] (1)

[0030] = 0.191 (%, relative to the mass percentage of concrete)

[0031] Within the protection period of the coating, the average diffusion coefficient of the coated concrete is 0.11×10 -12 m 2 / s.

[0032] (2)

[0033] = 0.11 (×10 -12 m 2 / s)

...

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Abstract

The invention relates to a method for evaluating the concrete surface coating to prolong the durability life of a concrete structure, which mainly includes the following steps: (1) preparing concrete specimens and curing them; (2) after the surface of the specimens is dry, partially test One part is coated with concrete surface coating, and the other part is not coated with concrete surface coating; (3) After the coating is cured, the concrete specimen is exposed to a chloride salt environment; (4) After exposure to different ages, the specimen is taken out (5) According to Fick's second law, quantitatively evaluate the concrete surface coating to extend the durability life of the concrete structure. The invention has the advantages that: the invention can quantitatively calculate and evaluate the concrete surface coating to prolong the durability life of the concrete structure, realize the precise design of the protection life of the coating, and ensure the durability and service safety of the concrete structure.

Description

technical field [0001] The invention relates to the field of durability and corrosion protection of concrete structures in marine environments, in particular to a method for quantitatively evaluating concrete surface coatings to prolong the durability life of concrete structures. Background technique [0002] Concrete surface coating can effectively isolate the intrusion of harmful media in the environment, and is the most commonly used additional anti-corrosion measure to improve concrete structures. The protective effect of coatings is the most concerned issue for engineering designers and builders. A lot of research has been done on the protective effect of coatings. The research results show that: coatings can effectively isolate the intrusion of harmful media in the environment. Durability of tall concrete structures. However, these studies are all qualitative and concluded that the coating has a good protective effect. It is not possible to quantitatively assess that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N13/00G01N17/00
CPCG01N13/00G01N17/00G01N2013/003
Inventor 汤雁冰倪静姁杨海成刘志红刘刚郭浩吴百公许静田伯强苏贞
Owner JIANGSU UNIV OF SCI & TECH
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