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Test method of cement-based material chloride ion penetration depth

A technology for chloride ion penetration and cement-based materials, which is applied in the field of testing the depth of chloride ion penetration of cement-based materials. Test manpower and time, the effect of short test time

Active Publication Date: 2014-03-26
SHENZHEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for testing the depth of chloride ion penetration of cement-based materials, which aims to solve the problems of easy damage of molds and cement specimens, non-repeatable detection, large errors, and inconvenient operation in the existing testing methods.

Method used

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  • Test method of cement-based material chloride ion penetration depth
  • Test method of cement-based material chloride ion penetration depth
  • Test method of cement-based material chloride ion penetration depth

Examples

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Embodiment 1

[0032] A cement-based material chloride ion penetration depth test method, comprising the following steps:

[0033] (1) Inject the composite Portland cement into the mold disclosed by the patent No. ZL201120473976.2 to carry out cement specimen curing, remove the electrode plates at both ends of the mold and place the molds at 300mg / L, 3000mg / L, and 6000mg / L respectively. Osmosis is carried out in a sodium chloride solution with a chloride ion concentration of L.

[0034] In step (1), the 525 composite Portland cement produced by Shenzhen Starfish Onoda Cement Co., Ltd. is injected into the mold disclosed by the patent No. ZL201120473976.2 (see the use disclosed in the third page of the embodiment of the specification part of the patent document for details) The mold used for the online test of electrochemical impedance spectroscopy in the cement hydration process, the model specification of the mold is specifically described in the paragraph 0030 of the embodiment: "The mater...

Embodiment 2

[0059] A cement-based material chloride ion penetration depth test method, comprising the following steps:

[0060] (1) Inject the composite Portland cement into the mold disclosed by the patent No. ZL201120473976.2 to carry out the curing of the cement specimen, remove the electrode plates at both ends of the mold and place the mold in sodium chloride solutions with different chloride ion concentrations. penetration.

[0061] In step (1), the 525 composite Portland cement produced by Shenzhen Starfish Onoda Cement Co., Ltd. is injected into the mold disclosed by the patent No. ZL201120473976.2 (see the use disclosed in the third page of the embodiment of the specification part of the patent document for details) The mold used for the online test of electrochemical impedance spectroscopy in the cement hydration process, the model specification of the mold is specifically described in the paragraph 0030 of the embodiment: "The material of the bottom plate 1, the side plate 2 an...

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Abstract

The invention provides a test method of a cement-based material chloride ion penetration depth. The method uses a mould disclosed in a patent of which the patent number is 'ZL201120473976.2' and used for an electrochemical impedance spectroscopy online test in a cement hydration process to carry out full-course maintenance and a chloride ion penetration test for cement materials. Electrode plates of 40mm*40mm arranged at two ends of the mould are detached during chloride penetration to enable the cement materials to be eroded by the chloride ions; when the test is to be carried out, the electrode plates are mounted at the two ends of the mould to carry out the electrochemical impedance spectrum test; finally the chloride ion penetration depth of the cement materials are reflected and calculated through regular variation of electrochemical parameters. The test method disclosed by the invention has the advantages that the mould and cement test pieces are not easy to damage, repeatable detection is achieved, the error is small and the operation is convenient.

Description

technical field [0001] The invention belongs to the field of cement material penetration test methods, in particular to a cement-based material chloride ion penetration depth test method. Background technique [0002] Chloride ion intrusion into the interior of cement concrete causes steel bar corrosion, structural bearing capacity decrease and durability decrease, which is one of the main reasons for the failure of reinforced concrete structures in coastal areas. Chloride ions affect the microstructure of cement-based materials. The chemical combination is mainly the process of forming Friedel's salt, and the physical adsorption is mainly the effect of gel on chloride ions. When the concentration of chloride ions in concrete is high, it can react with materials to form compounds, and its expansion causes cracks in cement concrete. In the corrosion process of steel bars, chloride ions are used as intermediate products to improve the efficiency of corrosion cells and acceler...

Claims

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Application Information

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IPC IPC(8): G01N15/08G01N13/04
Inventor 董必钦邢锋袁伟鹏尹远陈立邱启文张健超徐伟伟房国豪王琰帅
Owner SHENZHEN UNIV
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