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Assessment system and method of concrete chloride ion diffusion coefficient

A chloride ion diffusion and concrete technology, applied in diffusion analysis, measuring devices, instruments, etc., can solve problems such as inconvenience in scientific research, and achieve the effect of shortening the cycle

Active Publication Date: 2016-04-06
JSTI GRP INSPECTION & CERTIFICATION CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The main method for evaluating the chloride ion diffusion coefficient of concrete in my country is the RCM method. However, as a rapid test method, the RCM method generally lasts for 48 hours or 96 hours in the actual application process. , which brings a lot of inconvenience to large-scale testing work and scientific research

Method used

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  • Assessment system and method of concrete chloride ion diffusion coefficient
  • Assessment system and method of concrete chloride ion diffusion coefficient
  • Assessment system and method of concrete chloride ion diffusion coefficient

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Choose a group of 56d test pieces, each group has three pieces, numbered 1~3, corresponding to the initial current value I 1 ~I 3 , The chloride ion diffusion coefficient is recorded as D 1 ~D 3 ,According to the RCM method, put the test piece into the rubber sleeve after being saturated with water under vacuum. After tightening, it is placed on the support with the cathode plate in the test tank. The anode plate is placed in the rubber sleeve and injected into the rubber sleeve and the test tank. 0.3mol / L NaOH solution and 10% NaCl solution, the inner and outer liquid levels are flush, connect the power supply to the cathode and anode, turn on the power, and read the initial current value I of the test piece 1 ~I 3 , Followed by 8mA, 9mA, 9mA, and the RCM method and the present invention are used to evaluate the chloride ion diffusion coefficient. 1~3 The test piece is tested according to the RCM method (60V voltage is continuously applied for 48h) to obtain D 1 =2.0×10 -...

Embodiment 2

[0067] Choose a group of 56d test pieces, each group has three pieces, numbered 1~3, corresponding to the initial current value I 1 ~I 3 , The chloride ion diffusion coefficient is recorded as D 1 ~D 3 ,According to the RCM method, put the test piece into the rubber sleeve after being saturated with water under vacuum. After tightening, it is placed on the support with the cathode plate in the test tank. The anode plate is placed in the rubber sleeve and injected into the rubber sleeve and the test tank. 0.3mol / L NaOH solution and 10% NaCl solution, the inner and outer liquid levels are flush, connect the power supply to the cathode and anode, turn on the power supply, and read the initial current I of the test piece 1 ~I 3 , Followed by 13mA, 15mA, and 16mA. The chloride ion diffusion coefficient was evaluated by the RCM method and the present invention respectively. No. 1 to No. 3 specimens are tested according to the RCM method (continuous pressure for 24 hours, No. 1 specimen...

Embodiment 3

[0070] Choose a group of 28d test pieces, each group has three pieces, numbered 1-3, and the corresponding initial current is marked as I 1 ~I 3 , The chloride ion diffusion coefficient is recorded as D 1 ~D 3 ,According to the RCM method, put the test piece into the rubber sleeve after being saturated with water under vacuum. After tightening, it is placed on the support with the cathode plate in the test tank. The anode plate is placed in the rubber sleeve and injected into the rubber sleeve and the test tank. 0.3mol / L NaOH solution and 10% NaCl solution, the inner and outer liquid levels are flush, connect the power supply to the cathode and anode, turn on the power supply, and read the initial current I of the test piece 1 ~I 3 , Followed by 20mA, 21mA, 21mA, and the RCM method and the present invention are used to evaluate the chloride ion diffusion coefficient. No. 1~3 specimens are tested according to the RCM method (continuous application of 40V voltage for 24h) to obtain...

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Abstract

The present invention discloses an assessment system of concrete chloride ion diffusion coefficient. The system includes a detection device, a processing device and a result output device. The detection device is used for detecting an initial current value of a concrete specimen, and an initial temperature, a finish temperature and a chloride ion penetration depth of an anode solution of the concrete specimen, and transmitting the results to the processing device; the processing device is used for receiving the initial current value transmitted by the detection device, comparing the initial current value with a preset threshold; when the initial current value is less than the preset threshold, the assessment result is directly delivered to the result output device; and when the initial current value is greater than or equal to the preset threshold, the processing device according to a preset algorithm calculates an assessment result by using an average value of the initial temperature and the finish temperature of the anode solution of the specimen, and the chloride ion penetration depth. The present invention also provides an assessment method of concrete chloride ion diffusion coefficient. The assessment system provided by the invention greatly reduces the assessment cycle of the concrete chloride ion diffusion coefficient.

Description

Technical field [0001] The invention relates to the technical field of concrete quality control, in particular to a concrete chloride ion diffusion coefficient evaluation system, and also to a concrete chloride ion diffusion coefficient evaluation method. Background technique [0002] In the ocean and in the environment where deicing salt is often used, the durability of concrete has become increasingly prominent. The reduction in structural service life caused by the penetration of chloride ions is particularly serious in the overall durability problem. The steel bars in reinforced concrete structures are often caused by chlorine. The penetration of ions leads to corrosion, which in turn destroys the durability of the concrete structure, which greatly affects the service life of the building structure. Therefore, the evaluation of the anti-chloride ion permeability of concrete in marine engineering, that is, the assessment of the chloride ion diffusion coefficient of concrete is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N13/04
CPCG01N13/04G01N2013/003
Inventor 董跃华卫兵吴海兵孟文专
Owner JSTI GRP INSPECTION & CERTIFICATION CO LTD
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